This study presents a detailed numerical analysis of Fractional Quantum Hall Effect (FQHE) states in three confined 2D geometries: quantum dots, nanoribbons, and Corbino disks. Using Python-based simulations, with Kwant employed for lattice modeling and spectral analysis, the research examines how confinement geometry affects energy spectra, edge state localization, and topological stability, focusing on fractional filling factors = 1/3 and 5/2. Key parameters such as energy gaps, edge state density, and state degeneracy are analyzed across varying system sizes. The results reveal that Corbino disks exhibit superior topological robustness and stable energy gaps under confinement, while nanoribbons and quantum dots are more susceptible to edge degradation and gap suppression. These findings highlight the critical role of geometry in maintaining FQHE phase stability, offering design guidelines for integrating FQHE-based functionalities into scalable quantum electronic devices.
{"title":"Numerical Modeling of Fractional Quantum Hall Effect States in Finite Geometries for Device Miniaturization","authors":"Lokesh Sharma, Priya Mudgal, Shobha Sharma, Deepti Sharma, Debabrata Sikdar","doi":"10.1002/adts.202501582","DOIUrl":"https://doi.org/10.1002/adts.202501582","url":null,"abstract":"This study presents a detailed numerical analysis of Fractional Quantum Hall Effect (FQHE) states in three confined 2D geometries: quantum dots, nanoribbons, and Corbino disks. Using Python-based simulations, with Kwant employed for lattice modeling and spectral analysis, the research examines how confinement geometry affects energy spectra, edge state localization, and topological stability, focusing on fractional filling factors <span data-altimg=\"/cms/asset/c9fb2bee-a341-4d5b-8fd8-d358b1029d95/adts70275-math-0001.png\"></span><mjx-container ctxtmenu_counter=\"1\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"><mjx-math aria-hidden=\"true\" location=\"graphic/adts70275-math-0001.png\"><mjx-semantics><mjx-mrow><mjx-mi data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"bold-italic\" data-semantic- data-semantic-role=\"greekletter\" data-semantic-speech=\"bold italic nu\" data-semantic-type=\"identifier\"><mjx-c></mjx-c></mjx-mi></mjx-mrow></mjx-semantics></mjx-math><mjx-assistive-mml display=\"inline\" unselectable=\"on\"><math altimg=\"urn:x-wiley:25130390:media:adts70275:adts70275-math-0001\" display=\"inline\" location=\"graphic/adts70275-math-0001.png\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><semantics><mrow><mi data-semantic-=\"\" data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"bold-italic\" data-semantic-role=\"greekletter\" data-semantic-speech=\"bold italic nu\" data-semantic-type=\"identifier\" mathvariant=\"bold-italic\">ν</mi></mrow>${bm{nu }}$</annotation></semantics></math></mjx-assistive-mml></mjx-container> = 1/3 and 5/2. Key parameters such as energy gaps, edge state density, and state degeneracy are analyzed across varying system sizes. The results reveal that Corbino disks exhibit superior topological robustness and stable energy gaps under confinement, while nanoribbons and quantum dots are more susceptible to edge degradation and gap suppression. These findings highlight the critical role of geometry in maintaining FQHE phase stability, offering design guidelines for integrating FQHE-based functionalities into scalable quantum electronic devices.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145753137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The crucial role of organic cation orientation in shaping the optoelectronic properties of hybrid organic–inorganic perovskites (HOIPs) is revealed through a systematic investigation of a diverse set of organic cations, the orientational preferences of many of which are considered for the first time. 22 different organic cations were incorporated as A‐site cations in the cubic, orthorhombic, and tetragonal crystal phases of . To explore a broad configurational space, these cations were randomly rotated, generating over 2500 structural variations, among which approximately 400 exhibited distinct symmetry. Density functional theory (DFT) calculations on these structures revealed that variations in organic A‐cation orientation can induce formation energy and bandgap differences of up to 0.32 and 0.64 eV, respectively. Rather than aiming to reproduce exactly known experimental compounds for each perovskite, we used a unified modeling approach to systematically explore how the size and orientation of organic cations govern lattice distortion and electronic structure in perovskite frameworks. Through rotational screening, a new orthorhombic phase of the well‐known (MA = ) was identified, in which MA cations are aligned along the [102] and [10 directions. Additionally, a novel pseudocubic triclinic perovskite, (TiZ = ), was discovered and validated as a stable perovskite based on its formation energy, bandgap, effective mass, mechanical properties, and dynamic stability.
{"title":"Organic Cation Orientation Preferences in Hybrid Lead Halide Perovskites","authors":"Somayyeh Alidoust, Adem Tekin","doi":"10.1002/adts.202501645","DOIUrl":"https://doi.org/10.1002/adts.202501645","url":null,"abstract":"The crucial role of organic cation orientation in shaping the optoelectronic properties of hybrid organic–inorganic perovskites (HOIPs) is revealed through a systematic investigation of a diverse set of organic cations, the orientational preferences of many of which are considered for the first time. 22 different organic cations were incorporated as A‐site cations in the cubic, orthorhombic, and tetragonal crystal phases of . To explore a broad configurational space, these cations were randomly rotated, generating over 2500 structural variations, among which approximately 400 exhibited distinct symmetry. Density functional theory (DFT) calculations on these structures revealed that variations in organic A‐cation orientation can induce formation energy and bandgap differences of up to 0.32 and 0.64 eV, respectively. Rather than aiming to reproduce exactly known experimental compounds for each perovskite, we used a unified modeling approach to systematically explore how the size and orientation of organic cations govern lattice distortion and electronic structure in perovskite frameworks. Through rotational screening, a new orthorhombic phase of the well‐known (MA = ) was identified, in which MA cations are aligned along the [102] and [10 directions. Additionally, a novel pseudocubic triclinic perovskite, (TiZ = ), was discovered and validated as a stable perovskite based on its formation energy, bandgap, effective mass, mechanical properties, and dynamic stability.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"151 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the potential use of naturally occurring TCNQ and its derivatives as non‐fullerene acceptors (NFAs) in organic solar cells (OSCs). The density functional theory (DFT) and time‐dependent density functional theory (TD‐DFT) calculations at the B3LYP/6–311G (d,p) levels are employed to analyze the electronic structures and optical behaviors of these compounds. The optoelectronic properties of these molecules in chloroform are investigated. Electronic properties, including the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies, electronic bandgap ( E g ), quantum chemical parameter, excitation energy ( E x ), maximum wavelength ( λ max ), oscillator strength (ƒ), binding energy ( E b ), open‐circuit voltage ( Voc ) and fill factor ( FF ) of the understudy molecules are calculated. Results indicated that the modification in TCNQ reduces the E g , increasing the λ max and the values of Voc and FF , especially for TCNQ11, which has Voc 1.459 V and FF 91.20 % when combined with donor polymer (DP) P3HT. These promising results underscore the potential of our studied molecules for efficient application in organic solar cells and their significant contribution to the advancement of photovoltaic technology.
{"title":"Computational Evaluation of Tetracyano‐p‐quinodimethane TCNQ Based Derivatives as Non‐Fullerene Acceptors for Organic Solar Cells","authors":"Adeel Mubarik, Faiza Shafiq, Xue‐Hai Ju","doi":"10.1002/adts.202501758","DOIUrl":"https://doi.org/10.1002/adts.202501758","url":null,"abstract":"This study investigates the potential use of naturally occurring TCNQ and its derivatives as non‐fullerene acceptors (NFAs) in organic solar cells (OSCs). The density functional theory (DFT) and time‐dependent density functional theory (TD‐DFT) calculations at the B3LYP/6–311G (d,p) levels are employed to analyze the electronic structures and optical behaviors of these compounds. The optoelectronic properties of these molecules in chloroform are investigated. Electronic properties, including the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies, electronic bandgap ( <jats:italic> E <jats:sub>g</jats:sub> </jats:italic> ), quantum chemical parameter, excitation energy ( <jats:italic> E <jats:sub>x</jats:sub> </jats:italic> ), maximum wavelength ( <jats:italic> λ <jats:sub>max</jats:sub> </jats:italic> ), oscillator strength (ƒ), binding energy ( <jats:italic> E <jats:sub>b</jats:sub> </jats:italic> ), open‐circuit voltage ( <jats:italic>V</jats:italic> <jats:sub>oc</jats:sub> ) and fill factor ( <jats:italic>FF</jats:italic> ) of the understudy molecules are calculated. Results indicated that the modification in TCNQ reduces the <jats:italic> E <jats:sub>g</jats:sub> </jats:italic> , increasing the <jats:italic> λ <jats:sub>max</jats:sub> </jats:italic> and the values of <jats:italic>V</jats:italic> <jats:sub>oc</jats:sub> and <jats:italic>FF</jats:italic> , especially for TCNQ11, which has <jats:italic>V</jats:italic> <jats:sub>oc</jats:sub> 1.459 V and <jats:italic>FF</jats:italic> 91.20 % when combined with donor polymer (DP) P3HT. These promising results underscore the potential of our studied molecules for efficient application in organic solar cells and their significant contribution to the advancement of photovoltaic technology.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"9 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The stability, effectiveness, and versatility of perovskite solar cells (PSCs) can only be improved with advanced solar materials, opening the door for future‐oriented green energy solutions. In this study, eight recently developed anthracene‐based triphenylamine hole transporting layers, HTLs, (PEH‐S1‐PEH‐S8), derived from the PEH‐R core with thiophene and acceptor substitutions, are systematically investigated using DFT and TD‐DFT calculations at B3LYP/6‐31G** level. These HTL materials' optical, electrical, and charge‐transport characteristics are thoroughly evaluated to understand the structure‐property relationship. The PEH‐S7 molecule facilitates the efficient transfer of electronic densities from HOMO to LUMO by elucidating the maximum absorbance at 730 nm, the highest oscillator frequency (f = 1.687), the greatest light harvesting efficacy (LHE = 0.979), and the highest electron affinity (EA = 2.96 eV) in tetrahydrofuran (THF) solvent with the highest open circuit voltage (V oc = 1.38 V). This also showed higher solar efficiency (19.89%) than commercial spiro‐OMeTAD. Comparing PEH‐S1‐PEH‐S8 to the PEH‐R, it is discovered that their electron and hole mobilities are higher. These findings show that the energy levels, reorganization energies, optical and charge‐transport properties of HTL materials can be successfully tuned by strategic peripheral substitution with thiophene and electron‐acceptor groups, thereby guiding the design of future high‐performance PSCs and practical device applications.
{"title":"First‐Principles Exploration of Charge Transfer and Optoelectronic Properties in Anthracene‐Based Hole Transporters for Perovskite Solar Cells: Insights Supported by Device‐Level Simulations","authors":"Sidra Manzoor, Faheem Abbas, Muhammad Ishaq, Gadah Albasher, Faiza Shafiq, Mehvish Perveen, Zainab Asif, Saima Noreen","doi":"10.1002/adts.202501774","DOIUrl":"https://doi.org/10.1002/adts.202501774","url":null,"abstract":"The stability, effectiveness, and versatility of perovskite solar cells (PSCs) can only be improved with advanced solar materials, opening the door for future‐oriented green energy solutions. In this study, eight recently developed anthracene‐based triphenylamine hole transporting layers, HTLs, (PEH‐S1‐PEH‐S8), derived from the PEH‐R core with thiophene and acceptor substitutions, are systematically investigated using DFT and TD‐DFT calculations at B3LYP/6‐31G** level. These HTL materials' optical, electrical, and charge‐transport characteristics are thoroughly evaluated to understand the structure‐property relationship. The PEH‐S7 molecule facilitates the efficient transfer of electronic densities from HOMO to LUMO by elucidating the maximum absorbance at 730 nm, the highest oscillator frequency (f = 1.687), the greatest light harvesting efficacy (LHE = 0.979), and the highest electron affinity (EA = 2.96 eV) in tetrahydrofuran (THF) solvent with the highest open circuit voltage (V <jats:sub>oc</jats:sub> = 1.38 V). This also showed higher solar efficiency (19.89%) than commercial spiro‐OMeTAD. Comparing PEH‐S1‐PEH‐S8 to the PEH‐R, it is discovered that their electron and hole mobilities are higher. These findings show that the energy levels, reorganization energies, optical and charge‐transport properties of HTL materials can be successfully tuned by strategic peripheral substitution with thiophene and electron‐acceptor groups, thereby guiding the design of future high‐performance PSCs and practical device applications.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"159 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Water pollution due to heavy metal contamination has been the most challenging area in recent years. The heavy metals introduced into the water through numerous anthropogenic activities such as industrial and agricultural waste, mining etc., accumulate and will lead to adverse health risks to human and aquatic life. Thus, early and efficient detection of these pollutants in water is a growing demand, for which chemiresistive sensors stand as a promising approach due to their simplicity, accuracy, high sensitivity, and real‐time detection capability. To meet the increasing demand, this work investigates the transition metal (TM = Cu, Ni, and Zn) functionalized graphene for their sensing potential toward the toxic heavy metals: Arsenic (As), Chromium (Cr), Mercury (Hg), and Lead (Pb). This work integrates density functional theory (DFT) with Non‐Equilibrium Green's Function (NEGF) to evaluate the adsorption energetics, electronic, and transport properties. The findings reveal that functionalization of graphene with TM improves the adsorption energetics of heavy metals with significant variations in electronic and transport properties. The computed sensor parameters demonstrate a high sensitivity, ranging from 80% to 254% toward the studied heavy metal, and fast recovery, particularly toward the heavy metal mercury. Thus, the observed findings confirm the suitability of TM functionalized graphene for detecting heavy metal contaminants in water, in a real‐time environment.
{"title":"Suitability of Transition Metal Decorated Graphene for Carcinogenic Water Pollutants Detection: Computational Insight","authors":"Monika Srivastava, Anurag Srivastava","doi":"10.1002/adts.202501751","DOIUrl":"https://doi.org/10.1002/adts.202501751","url":null,"abstract":"Water pollution due to heavy metal contamination has been the most challenging area in recent years. The heavy metals introduced into the water through numerous anthropogenic activities such as industrial and agricultural waste, mining etc., accumulate and will lead to adverse health risks to human and aquatic life. Thus, early and efficient detection of these pollutants in water is a growing demand, for which chemiresistive sensors stand as a promising approach due to their simplicity, accuracy, high sensitivity, and real‐time detection capability. To meet the increasing demand, this work investigates the transition metal (TM = Cu, Ni, and Zn) functionalized graphene for their sensing potential toward the toxic heavy metals: Arsenic (As), Chromium (Cr), Mercury (Hg), and Lead (Pb). This work integrates density functional theory (DFT) with Non‐Equilibrium Green's Function (NEGF) to evaluate the adsorption energetics, electronic, and transport properties. The findings reveal that functionalization of graphene with TM improves the adsorption energetics of heavy metals with significant variations in electronic and transport properties. The computed sensor parameters demonstrate a high sensitivity, ranging from 80% to 254% toward the studied heavy metal, and fast recovery, particularly toward the heavy metal mercury. Thus, the observed findings confirm the suitability of TM functionalized graphene for detecting heavy metal contaminants in water, in a real‐time environment.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"1 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lung cancer, with more than 50 approved drugs, is still the deadliest cancer, with 1.80 million annual deaths, necessitating rapid drug development, which can be accelerated by AI‐driven prediction of potent candidates. In this study, we downloaded the lung cancer BioAssay data from ChEMBL and PubChem and filtered at a 5.0 µ m threshold, yielding 4,537 and 8,661 unique active compounds, respectively, and equal inactive molecules are extracted from the big inactive compound library, totalling 26,396 unique, balanced compounds are taken for descriptor computations with QikProp and AlvaDesc software. Mean imputations and standard scaling with PCA for feature sorting, followed by three Deep Learning Models—Residual Neural Network, Feed Forward Neural Network, and Recurrent Neural Network—with an 80:20 split, 50–100 epochs, Adam optimizer, 0.001 learning rate, 32 batch size, early stopping, and ensembled (majority voting, averaging, and stacking) to enhance robustness, accuracy, generalization, stability, and confidence in predicting Activity scores from 1 to 10. A user interface is built to deploy the trained models (h5) for scoring unlabeled compounds (scores 5–10 as highly active), achieving 0.99–1.0 accuracy and F1 scores. The top predicted compound library is docked (HTVS, SP, XP, MM‐GBSA) against ALK, HSP5, KRas, MMP‐8, and tRNA DHDS2, identifying the top three multitargeted hits (PubChem CIDs: 144074375, 440810382, and 48426893) with docking scores from –10.8 to –5.6 kcal/mol and MM‐GBSA energies from –67.7 to –10.4 kcal/mol. Pharmacokinetics and DFT analyses confirmed the drug‐likeness of the compound, while 5 ns WaterMap simulations revealed implicit water roles in interactions, and 100 ns MD simulations showed deviations and fluctuations within 2 Å, with numerous intermolecular interactions. The entire in‐silico study supported and validated the deep learning predictions, identifying the computational potency of compounds against lung cancer proteins—warranting experimental validation.
{"title":"DrLungker: A Deep Ensemble Learning Framework for Predicting Anti‐Lung Cancer Compound Activity and Validating Multitarget Potency through WaterMap, DFT, MD Simulations, and MM‐GBSA Analysis","authors":"Shaban Ahmad, Khalid Raza","doi":"10.1002/adts.202501550","DOIUrl":"https://doi.org/10.1002/adts.202501550","url":null,"abstract":"Lung cancer, with more than 50 approved drugs, is still the deadliest cancer, with 1.80 million annual deaths, necessitating rapid drug development, which can be accelerated by AI‐driven prediction of potent candidates. In this study, we downloaded the lung cancer BioAssay data from ChEMBL and PubChem and filtered at a 5.0 µ <jats:sc>m</jats:sc> threshold, yielding 4,537 and 8,661 unique active compounds, respectively, and equal inactive molecules are extracted from the big inactive compound library, totalling 26,396 unique, balanced compounds are taken for descriptor computations with QikProp and AlvaDesc software. Mean imputations and standard scaling with PCA for feature sorting, followed by three Deep Learning Models—Residual Neural Network, Feed Forward Neural Network, and Recurrent Neural Network—with an 80:20 split, 50–100 epochs, Adam optimizer, 0.001 learning rate, 32 batch size, early stopping, and ensembled (majority voting, averaging, and stacking) to enhance robustness, accuracy, generalization, stability, and confidence in predicting Activity scores from 1 to 10. A user interface is built to deploy the trained models (h5) for scoring unlabeled compounds (scores 5–10 as highly active), achieving 0.99–1.0 accuracy and F1 scores. The top predicted compound library is docked (HTVS, SP, XP, MM‐GBSA) against ALK, HSP5, KRas, MMP‐8, and tRNA DHDS2, identifying the top three multitargeted hits (PubChem CIDs: 144074375, 440810382, and 48426893) with docking scores from –10.8 to –5.6 kcal/mol and MM‐GBSA energies from –67.7 to –10.4 kcal/mol. Pharmacokinetics and DFT analyses confirmed the drug‐likeness of the compound, while 5 ns WaterMap simulations revealed implicit water roles in interactions, and 100 ns MD simulations showed deviations and fluctuations within 2 Å, with numerous intermolecular interactions. The entire in‐silico study supported and validated the deep learning predictions, identifying the computational potency of compounds against lung cancer proteins—warranting experimental validation.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"112 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The advancement of non‐fullerene acceptors has rocketed the power conversion efficiency (PCE) of organic photovoltaic (OPV) devices to values reaching close to 21%. However, the development of complementary donor materials has not kept pace, posing a key challenge for further improving device performance. In this theoretical study, we combine density functional theory (DFT) with Marcus theory to systematically design and evaluate donor molecules with ‐A architectures. Our focus lies in tuning electronic and optical properties – such as frontier molecular orbital energies, and singlet and triplet excitation characteristics – toward more efficient charge generation when coupled to non‐fullerene acceptor Y6. In small donor systems featuring fused thiophene ‐bridges, we find two‐dimensional delocalization of the highest occupied molecular orbital (HOMO) across the backbone and the core's side chain, which enhances the transition dipole moment. Furthermore, while fused ‐bridges lead to relatively stable transition rate constants across various interfacial configurations, they exhibit a limited CT state manifold, which may impede efficient charge separation following excitation of the acceptor. These findings provide molecular design insights critical for next‐generation high‐performance all‐molecule OPV devices.
{"title":"Designing High Performance Organic Donor Molecules for Photovoltaics","authors":"Fabian Bauch, Chuan‐Ding Dong, Stefan Schumacher","doi":"10.1002/adts.202501560","DOIUrl":"https://doi.org/10.1002/adts.202501560","url":null,"abstract":"The advancement of non‐fullerene acceptors has rocketed the power conversion efficiency (PCE) of organic photovoltaic (OPV) devices to values reaching close to 21%. However, the development of complementary donor materials has not kept pace, posing a key challenge for further improving device performance. In this theoretical study, we combine density functional theory (DFT) with Marcus theory to systematically design and evaluate donor molecules with ‐A architectures. Our focus lies in tuning electronic and optical properties – such as frontier molecular orbital energies, and singlet and triplet excitation characteristics – toward more efficient charge generation when coupled to non‐fullerene acceptor Y6. In small donor systems featuring fused thiophene ‐bridges, we find two‐dimensional delocalization of the highest occupied molecular orbital (HOMO) across the backbone and the core's side chain, which enhances the transition dipole moment. Furthermore, while fused ‐bridges lead to relatively stable transition rate constants across various interfacial configurations, they exhibit a limited CT state manifold, which may impede efficient charge separation following excitation of the acceptor. These findings provide molecular design insights critical for next‐generation high‐performance all‐molecule OPV devices.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"11 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sangameswaran Krishnan, Zehua Pan, Zheng Zhong, Zilin Yan
Protonic ceramic fuel cells (PCFCs) represent a significant advancement in fuel cell technology due to their ability to operate at intermediate temperatures, offering enhanced efficiency and reduced material degradation compared to traditional high‐temperature oxygen ion conducting solid oxide fuel cells (O‐SOFCs). While PCFCs hold immense potential for commercialization, their material innovation remains a critical bottleneck to achieving widespread viability. This comprehensive review explores the synergistic integration of density functional theory (DFT) based calculations with machine learning (ML) methodologies, illuminating their collective impact on accelerating PCFC material development. Combination of DFT's atomic‐level precision in material property prediction with ML's sophisticated predictive algorithms, creates a powerful framework for exploring vast compositional spaces of critical materials, including perovskite oxides, double perovskite oxides, Ruddlesden‐Popper oxides, and other similar systems. The integration not only enhances computational efficiency but also enables the systematic investigation of complex structure–property relationships essential for advancing PCFC technology. The review methodically examines three interconnected themes: First, it delves into the cutting‐edge strategies and material developments that have propelled recent advances in PCFC applications; second, it analyzes DFT's pivotal role in facilitating PCFC progress through accurate atomic‐scale modeling; and third, it elucidates the revolutionary impact of ML integration with DFT methodologies and its implications for PCFC developments. By focusing on seminal contributions within each domain, this work provides a strategic perspective on the convergence of computational chemistry and ML in PCFC's future advancements.
{"title":"Leveraging DFT Calculations and Machine Learning toward Materials Innovations for Proton Ceramic Fuel Cells (PCFCs): A Comprehensive Review","authors":"Sangameswaran Krishnan, Zehua Pan, Zheng Zhong, Zilin Yan","doi":"10.1002/adts.202500855","DOIUrl":"https://doi.org/10.1002/adts.202500855","url":null,"abstract":"Protonic ceramic fuel cells (PCFCs) represent a significant advancement in fuel cell technology due to their ability to operate at intermediate temperatures, offering enhanced efficiency and reduced material degradation compared to traditional high‐temperature oxygen ion conducting solid oxide fuel cells (O‐SOFCs). While PCFCs hold immense potential for commercialization, their material innovation remains a critical bottleneck to achieving widespread viability. This comprehensive review explores the synergistic integration of density functional theory (DFT) based calculations with machine learning (ML) methodologies, illuminating their collective impact on accelerating PCFC material development. Combination of DFT's atomic‐level precision in material property prediction with ML's sophisticated predictive algorithms, creates a powerful framework for exploring vast compositional spaces of critical materials, including perovskite oxides, double perovskite oxides, Ruddlesden‐Popper oxides, and other similar systems. The integration not only enhances computational efficiency but also enables the systematic investigation of complex structure–property relationships essential for advancing PCFC technology. The review methodically examines three interconnected themes: First, it delves into the cutting‐edge strategies and material developments that have propelled recent advances in PCFC applications; second, it analyzes DFT's pivotal role in facilitating PCFC progress through accurate atomic‐scale modeling; and third, it elucidates the revolutionary impact of ML integration with DFT methodologies and its implications for PCFC developments. By focusing on seminal contributions within each domain, this work provides a strategic perspective on the convergence of computational chemistry and ML in PCFC's future advancements.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"6 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mahasen H. Albelbeisi, Saleh Chebaane, Sana Ben Khalifa, Norah A. M. Alsaif
The primary causes of the high cost of perovskite solar cells are metal electrodes and hole transport layers. In this theoretical work, we examine the outputs of a hole transport layer‐free carbon‐based solar cell with an FTO/ETL/Cs 2 PtI 6 /Carbon electrode structure using the Solar Cell Capacitance Simulator (SCAPS‐1D). The paper studied various carbon electrode types‐Graphene/Carbon Black (G/CB) (5 eV), Graphene (4.9 eV), Graphene Oxide (GO) (4.8 eV), and Bio‐carbon (4.5 eV)‐ and electron transport layers‐SnO 2 , TiO 2 , LBSO, and WO 3 . The studied parameters included perovskite and ETL layer thickness, doping density, and defect density. The outputs showed that the best PCE of 15.50% resulted from using G/CB electrode and TiO 2 as the ETL, with a thickness of 0.09 µm, and a doping density of 10 × 10 19 cm −3 . Additionally, for the Cs 2 PtI 6 absorber layer, a Cs 2 PtI 6 composition with a thickness of 1.2 µm, a defect density of 1× 10 15 cm −3 , and a doping density of 10 × 10 12 cm −3 demonstrated superior performance, resulting in a PCE of 15.50%. These findings suggest that the FTO/TiO 2 /Cs 2 PtI 6 /G/CB structure, particularly with optimized TiO 2 and Cs 2 PtI 6 layers, holds great potential for hole transport layer‐free‐carbon‐based solar cell fabrication. Furthermore, machine learning models with a random forest algorithm evaluated the relative importance of the features on cell efficiency, and predicted the efficiency of the suggested configuration with R 2 of 0.93 underscoring the potential of machine learning in enhancing solar cell design and performance.
{"title":"Advancing HTL‐Free Cs 2 PtI 6 Carbon Perovskite Solar Cells: Insights from Hybrid Simulation and Machine Learning","authors":"Mahasen H. Albelbeisi, Saleh Chebaane, Sana Ben Khalifa, Norah A. M. Alsaif","doi":"10.1002/adts.202501860","DOIUrl":"https://doi.org/10.1002/adts.202501860","url":null,"abstract":"The primary causes of the high cost of perovskite solar cells are metal electrodes and hole transport layers. In this theoretical work, we examine the outputs of a hole transport layer‐free carbon‐based solar cell with an FTO/ETL/Cs <jats:sub>2</jats:sub> PtI <jats:sub>6</jats:sub> /Carbon electrode structure using the Solar Cell Capacitance Simulator (SCAPS‐1D). The paper studied various carbon electrode types‐Graphene/Carbon Black (G/CB) (5 eV), Graphene (4.9 eV), Graphene Oxide (GO) (4.8 eV), and Bio‐carbon (4.5 eV)‐ and electron transport layers‐SnO <jats:sub>2</jats:sub> , TiO <jats:sub>2</jats:sub> , LBSO, and WO <jats:sub>3</jats:sub> . The studied parameters included perovskite and ETL layer thickness, doping density, and defect density. The outputs showed that the best PCE of 15.50% resulted from using G/CB electrode and TiO <jats:sub>2</jats:sub> as the ETL, with a thickness of 0.09 µm, and a doping density of 10 × 10 <jats:sup>19</jats:sup> cm <jats:sup>−3</jats:sup> . Additionally, for the Cs <jats:sub>2</jats:sub> PtI <jats:sub>6</jats:sub> absorber layer, a Cs <jats:sub>2</jats:sub> PtI <jats:sub>6</jats:sub> composition with a thickness of 1.2 µm, a defect density of 1× 10 <jats:sup>15</jats:sup> cm <jats:sup>−3</jats:sup> , and a doping density of 10 × 10 <jats:sup>12</jats:sup> cm <jats:sup>−3</jats:sup> demonstrated superior performance, resulting in a PCE of 15.50%. These findings suggest that the FTO/TiO <jats:sub>2</jats:sub> /Cs <jats:sub>2</jats:sub> PtI <jats:sub>6</jats:sub> /G/CB structure, particularly with optimized TiO <jats:sub>2</jats:sub> and Cs <jats:sub>2</jats:sub> PtI <jats:sub>6</jats:sub> layers, holds great potential for hole transport layer‐free‐carbon‐based solar cell fabrication. Furthermore, machine learning models with a random forest algorithm evaluated the relative importance of the features on cell efficiency, and predicted the efficiency of the suggested configuration with R <jats:sup>2</jats:sup> of 0.93 underscoring the potential of machine learning in enhancing solar cell design and performance.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"9 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The critical behavior of (1−x) LSMO/xNaF composites with x = 0, 0.05, 0.15, and 0.20 near the second‐order paramagnetic–ferromagnetic transition is investigated through a combination of Arrott–Noakes formalism (ANF) and Kouvel–Fisher (KF) analysis. Critical exponents ( β , γ ) are determined iteratively to be (1.0004, 0.3406), (1.1593, 0.6230), (1.0467, 0.4391), and (1.0479, 0.4673) for (1‐x)LSMO/xNaF with x = 0, 0.05, 0.15, and 0.20, respectively. Furthermore, magnetocaloric entropy changes , computed via Landau theory, exhibited strong correspondence with Maxwell relation results, with minor discrepancies at high fields attributed to saturation effects. Overall, the results highlight the robustness of Landau phenomenology in describing criticality and magnetocaloric behavior, while revealing subtle doping‐induced modifications in exchange interactions.
{"title":"Critical Behavior and Magnetocaloric Simulation in LSMO/NaF Composites Using Landau Theory","authors":"Mohamed Hsini, Nadia Zaidi, Amel Haouas","doi":"10.1002/adts.202501677","DOIUrl":"https://doi.org/10.1002/adts.202501677","url":null,"abstract":"The critical behavior of (1−x) LSMO/xNaF composites with x = 0, 0.05, 0.15, and 0.20 near the second‐order paramagnetic–ferromagnetic transition is investigated through a combination of Arrott–Noakes formalism (ANF) and Kouvel–Fisher (KF) analysis. Critical exponents ( <jats:italic>β</jats:italic> , <jats:italic>γ</jats:italic> ) are determined iteratively to be (1.0004, 0.3406), (1.1593, 0.6230), (1.0467, 0.4391), and (1.0479, 0.4673) for (1‐x)LSMO/xNaF with x = 0, 0.05, 0.15, and 0.20, respectively. Furthermore, magnetocaloric entropy changes , computed via Landau theory, exhibited strong correspondence with Maxwell relation results, with minor discrepancies at high fields attributed to saturation effects. Overall, the results highlight the robustness of Landau phenomenology in describing criticality and magnetocaloric behavior, while revealing subtle doping‐induced modifications in exchange interactions.","PeriodicalId":7219,"journal":{"name":"Advanced Theory and Simulations","volume":"6 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145711415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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