Pub Date : 2026-02-08DOI: 10.1016/j.nanoen.2026.111784
Satyaranjan Bairagi, Muhammad Zada, Corin Otesteanu, Carlo Menon
{"title":"Electro-active Phase Assisted All-Fiber Triboelectric Nanogenerator (AF-TENG) for Energy Harvesting and Human Joint Angle Monitoring","authors":"Satyaranjan Bairagi, Muhammad Zada, Corin Otesteanu, Carlo Menon","doi":"10.1016/j.nanoen.2026.111784","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111784","url":null,"abstract":"","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"70 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysts capable of actively switching between distinct reaction pathways represent a paradigm shift in chemical synthesis. Here, we demonstrate a Thermo-Gated Activation phenomenon, which can be achieved by thermally activated escape of hot electrons. We establish that the Pt/TiO2 catalyst interface is kinetically trapped in a deep metastable potential well at low temperatures, blocking a potent plasmon-driven pathway. Above a critical temperature of 170 °C, the interface collectively escapes this well by overcoming a macroscopic activation barrier, a direct manifestation of a cooperative phase transition at the catalyst interface driven by thermal fluctuations. This escape event constructs a new, highly entropic dynamic interface that unlocks the pathway for hot-electron injection, redirecting the reaction to a highly efficient decarbonylation route with a remarkable H2 rate of 3,137 mol gPt-1 h-1. This work establishes a principle of Thermo-Gated Activation, which triggers a non-equilibrium charge transfer process as a novel blueprint for designing "smart" catalysts.
{"title":"Temperature-Triggered Switching of the Photo-thermal Catalysis Mechanism on Pt/TiO2 for Efficient Hydrogen Production","authors":"Chenghao Yao, Meng Li, Juncheng Wang, Can Yang, Jinbiao Huang, Weiwei Deng, Zhangsen Chen, Shuhui Sun, Zhan Lin, Dong-Sheng Li, Lei Li, Hanwen Liu, Shanqing Zhang","doi":"10.1016/j.nanoen.2026.111786","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111786","url":null,"abstract":"Catalysts capable of actively switching between distinct reaction pathways represent a paradigm shift in chemical synthesis. Here, we demonstrate a Thermo-Gated Activation phenomenon, which can be achieved by thermally activated escape of hot electrons. We establish that the Pt/TiO<sub>2</sub> catalyst interface is kinetically trapped in a deep metastable potential well at low temperatures, blocking a potent plasmon-driven pathway. Above a critical temperature of 170 °C, the interface collectively escapes this well by overcoming a macroscopic activation barrier, a direct manifestation of a cooperative phase transition at the catalyst interface driven by thermal fluctuations. This escape event constructs a new, highly entropic dynamic interface that unlocks the pathway for hot-electron injection, redirecting the reaction to a highly efficient decarbonylation route with a remarkable H<sub>2</sub> rate of 3,137<!-- --> <!-- -->mol g<sub>Pt</sub><sup>-1</sup> h<sup>-1</sup>. This work establishes a principle of Thermo-Gated Activation, which triggers a non-equilibrium charge transfer process as a novel blueprint for designing \"smart\" catalysts.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"132 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-07DOI: 10.1016/j.nanoen.2026.111785
Zixuan Li, Ka Chon Ng, Seth Anderson, Maximilian Jaugstetter, Miquel Salmeron, Michael C. Martin, Hans A. Bechtel, Stephanie N. Gilbert Corder
{"title":"Electrochemical Dynamics of Imidazolium Ionic Liquids at Graphene Electrodes for Energy Storage Applications","authors":"Zixuan Li, Ka Chon Ng, Seth Anderson, Maximilian Jaugstetter, Miquel Salmeron, Michael C. Martin, Hans A. Bechtel, Stephanie N. Gilbert Corder","doi":"10.1016/j.nanoen.2026.111785","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111785","url":null,"abstract":"","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"46 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Challenges facing aqueous zinc ion batteries (AZIBs) such as Zn dendrite growth, parasitic reactions, and electrolyte freezing impede their commercialization. Herein, we present a molecularly engineered hybrid electrolyte system (Zn(OTF)2/[EMIM]BF4-H2O) that simultaneously addresses these limitations through innovative cation-anion synergy. Through systematic screening of organic cations (EPY+, PY12+, and EMIM+), EMIM+ exhibits selective adsorption on Zn (100) and Zn (101) crystal facets, effectively directing Zn2+ deposition toward the Zn (002) facet. Complementarily, strategic anion engineering reveals that, unlike rigid OTF⁻/TFA⁻ counterparts, the highly electronegative BF₄⁻ anions effectively disrupt the hydrogen-bond network, enabling a facile transition from [Zn2+(H2O)3.05(OTF–)0.65(BF4–)2.3] (25°C) to [Zn2+(H2O)4.22(OTF⁻)0.64(BF4–)1.14] (-50℃), thus suppressing the hydrogen evolution reaction (HER) and reducing the activity of coordinated H2O. This synergistic interfacial/solvation regulation enables unprecedented performance: Zn||Zn symmetric cell achieve ultralong cycling stability (14000 h at 0.1 mA cm–2, -50℃) with 99.9% coulombic efficiency, while Zn||PANI full cell retain 101 mA h g–1 at 0.1 A g–1 over 3500 cycles with ≥99% capacity retention, outperforming existing low-temperature AZIBs.
{"title":"Synergistic Solvation Engineering of Ionic Liquid Electrolytes Enables Highly Reversible Zn Anode under Wide Temperatures","authors":"Zhibo Liu, Miaomiao Wu, Yong Guo, Qian Xiang, Lijuan Hai, Xiaoling Zhang, Zhiqiang Luo, Aikai Yang, Xingchao Wang","doi":"10.1016/j.nanoen.2026.111788","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111788","url":null,"abstract":"Challenges facing aqueous zinc ion batteries (AZIBs) such as Zn dendrite growth, parasitic reactions, and electrolyte freezing impede their commercialization. Herein, we present a molecularly engineered hybrid electrolyte system (Zn(OTF)<sub>2</sub>/[EMIM]BF<sub>4</sub>-H<sub>2</sub>O) that simultaneously addresses these limitations through innovative cation-anion synergy. Through systematic screening of organic cations (EPY<sup>+</sup>, PY<sub>12</sub><sup>+</sup>, and EMIM<sup>+</sup>), EMIM<sup>+</sup> exhibits selective adsorption on Zn (100) and Zn (101) crystal facets, effectively directing Zn<sup>2+</sup> deposition toward the Zn (002) facet. Complementarily, strategic anion engineering reveals that, unlike rigid OTF⁻/TFA⁻ counterparts, the highly electronegative BF₄⁻ anions effectively disrupt the hydrogen-bond network, enabling a facile transition from [Zn<sup>2+</sup>(H<sub>2</sub>O)<sub>3.05</sub>(OTF<sup>–</sup>)<sub>0.65</sub>(BF<sub>4</sub><sup>–</sup>)<sub>2.3</sub>] (25°C) to [Zn<sup>2+</sup>(H<sub>2</sub>O)<sub>4.22</sub>(OTF⁻)<sub>0.64</sub>(BF<sub>4</sub><sup>–</sup>)<sub>1.14</sub>] (-50℃), thus suppressing the hydrogen evolution reaction (HER) and reducing the activity of coordinated H<sub>2</sub>O. This synergistic interfacial/solvation regulation enables unprecedented performance: Zn||Zn symmetric cell achieve ultralong cycling stability (14000<!-- --> <!-- -->h at 0.1<!-- --> <!-- -->mA<!-- --> <!-- -->cm<sup>–2</sup>, -50℃) with 99.9% coulombic efficiency, while Zn||PANI full cell retain 101<!-- --> <!-- -->mA<!-- --> <!-- -->h g<sup>–1</sup> at 0.1<!-- --> <!-- -->A<!-- --> <!-- -->g<sup>–1</sup> over 3500 cycles with ≥99% capacity retention, outperforming existing low-temperature AZIBs.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"5 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-07DOI: 10.1016/j.nanoen.2026.111787
Elang Barruna, Sang Hyuk Gong, Yiseul Yoo, Eunji Kwon, Kyung Yoon Chung, Dong Won Chun, Kyu Hyoung Lee, Seungho Yu, Hyung-Seok Kim
Utilizing oxygen redox in layered oxide cathodes offers a pathway to exceed the capacity limits of conventional cationic redox sodium-ion batteries, yet its poor reversibility and oxygen loss lead to severe capacity fading. Here, we design a Li and F co-doped P2-type cathode, Na0.7Li0.1Mg0.15Mn0.75O1.9F0.1 (NLMMOF), to simultaneously enhance and stabilize oxygen redox activity. Li substitution promotes oxygen redox via the Na–O–Li configuration, while F substitution stabilizes the oxygen redox by strengthening the metal-anion bonding. NLMMOF exhibits a high discharge capacity of 191.96 mAh g⁻¹ at 0.05 C (1.5–4.5 V) and retains 85.1% of its capacity over 100 cycles at 0.5 C. Multiple analyses confirm that the enhanced electrochemical performance of NLMMOF is due to suppressed P2-O2 phase transition, minimal local structural distortion, and negligible oxygen evolution. DFT calculations further reveal that F substitution raises the Mn migration barrier at deep charge, mitigating Mn in-plane migration and under a coordinated oxygen lattice. This synergistic Li/F co-doping strategy provides a practical design principle for stabilizing oxygen redox in layered oxide cathodes, advancing the development of high-energy, long-life sodium-ion batteries.
{"title":"Synergistic Enhancement of Oxygen Redox Activity and Structural Integrity through Li/F Doping in Layered Oxide Cathodes for Sodium-ion Batteries","authors":"Elang Barruna, Sang Hyuk Gong, Yiseul Yoo, Eunji Kwon, Kyung Yoon Chung, Dong Won Chun, Kyu Hyoung Lee, Seungho Yu, Hyung-Seok Kim","doi":"10.1016/j.nanoen.2026.111787","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111787","url":null,"abstract":"Utilizing oxygen redox in layered oxide cathodes offers a pathway to exceed the capacity limits of conventional cationic redox sodium-ion batteries, yet its poor reversibility and oxygen loss lead to severe capacity fading. Here, we design a Li and F co-doped P2-type cathode, Na<sub>0.7</sub>Li<sub>0.1</sub>Mg<sub>0.15</sub>Mn<sub>0.75</sub>O<sub>1.9</sub>F<sub>0.1</sub> (NLMMOF), to simultaneously enhance and stabilize oxygen redox activity. Li substitution promotes oxygen redox via the Na–O–Li configuration, while F substitution stabilizes the oxygen redox by strengthening the metal-anion bonding. NLMMOF exhibits a high discharge capacity of 191.96 mAh g⁻¹ at 0.05<!-- --> <!-- -->C (1.5–4.5<!-- --> <!-- -->V) and retains 85.1% of its capacity over 100 cycles at 0.5<!-- --> <!-- -->C. Multiple analyses confirm that the enhanced electrochemical performance of NLMMOF is due to suppressed P2-O2 phase transition, minimal local structural distortion, and negligible oxygen evolution. DFT calculations further reveal that F substitution raises the Mn migration barrier at deep charge, mitigating Mn in-plane migration and under a coordinated oxygen lattice. This synergistic Li/F co-doping strategy provides a practical design principle for stabilizing oxygen redox in layered oxide cathodes, advancing the development of high-energy, long-life sodium-ion batteries.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"9 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the application of Si/C anodes in sulfide-based all-solid-state batteries (ASSBs), the nanosizing of silicon particles and the physical confinement of solid electrolytes (SEs) can be utilized to mitigate the expansion effect, while the carbon coating layer improves the electron conductivity of the anode. However, during the preparation of Si/C anodes, Si-Si bonds will break with numerous dangling bonds/defects on the surface of nm-Si, as the crystal grains are continuously nanosized. This leads to high surface energy and prone reactivity to form silicon oxides. Therefore, controlling the oxygen content in nm-Si precursors and enhancing oxidation resistance are crucial. In this study, unsaturated hydrocarbon compounds are used as grinding agents to form a strong Si-C interface with silicon nanoparticles, enhancing oxidation resistance. After carbonization, a carbon layer is formed to restrict the volume expansion of silicon nanoparticles and prevent direct contact between sulfide electrolytes and silicon nanoparticles, reducing side reactions. The grinding-Si /C(Gd-Si/C)/Li-In half-cell achieved 150 cycles at a current density of 1 A g-1, with a capacity retention rate of 96% and a reversible capacity of over 1000mAh g-1. The NCM811||Gd-Si/C sulfide ASSB delivered 150 cycles at a high specific capacity (7.6mAh cm-2), with a capacity retention rate of 80%.
{"title":"High-Performance Sulfide All-Solid-State Batteries With Antioxidant Si/C Anodes","authors":"Qian Li, DeXin Yu, MuChun Li, WeiTao He, Wenlin Yan, JiXian Luo, DengXu Wu, ZiQi Zhang, Chang Guo, Chuang Yi, Liquan Chen, Fan Wu","doi":"10.1016/j.nanoen.2026.111781","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111781","url":null,"abstract":"In the application of Si/C anodes in sulfide-based all-solid-state batteries (ASSBs), the nanosizing of silicon particles and the physical confinement of solid electrolytes (SEs) can be utilized to mitigate the expansion effect, while the carbon coating layer improves the electron conductivity of the anode. However, during the preparation of Si/C anodes, Si-Si bonds will break with numerous dangling bonds/defects on the surface of nm-Si, as the crystal grains are continuously nanosized. This leads to high surface energy and prone reactivity to form silicon oxides. Therefore, controlling the oxygen content in nm-Si precursors and enhancing oxidation resistance are crucial. In this study, unsaturated hydrocarbon compounds are used as grinding agents to form a strong Si-C interface with silicon nanoparticles, enhancing oxidation resistance. After carbonization, a carbon layer is formed to restrict the volume expansion of silicon nanoparticles and prevent direct contact between sulfide electrolytes and silicon nanoparticles, reducing side reactions. The grinding-Si /C(Gd-Si/C)/Li-In half-cell achieved 150 cycles at a current density of 1<!-- --> <!-- -->A<!-- --> <!-- -->g<sup>-1</sup>, with a capacity retention rate of 96% and a reversible capacity of over 1000mAh g<sup>-1</sup>. The NCM811||Gd-Si/C sulfide ASSB delivered 150 cycles at a high specific capacity (7.6mAh cm<sup>-2</sup>), with a capacity retention rate of 80%.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"1 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.nanoen.2026.111780
Zichen Gong, Jinfeng Dong, Soe Ko Ko Aung, Thang Bach Phan, Qi Qian, Tosawat Seetawan, Surasak Ruamruk, Yujie Ke, Bhuvanesh Srinivasan, Zhaogang Dong, Sai Kishore Ravi, Ady Suwardi, Jing Cao
{"title":"Evaporative hydrogels for high-performance ambient body heat harvesting via thermoelectric","authors":"Zichen Gong, Jinfeng Dong, Soe Ko Ko Aung, Thang Bach Phan, Qi Qian, Tosawat Seetawan, Surasak Ruamruk, Yujie Ke, Bhuvanesh Srinivasan, Zhaogang Dong, Sai Kishore Ravi, Ady Suwardi, Jing Cao","doi":"10.1016/j.nanoen.2026.111780","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111780","url":null,"abstract":"","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"255 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.nanoen.2026.111776
Xin Tan, Fei Xue, Xin Qin, Wei Ma, Han Yan
Developing highly-transparent organic solar cell (OSC) with an average visible transmittance (AVT) over 55% and a reasonable light utilization efficiency (LUE) over 2.50% is vital to enlarge its application scenarios for commercialization. Reducing electron-donor (D) content in photoactive layer represents a primary strategy for achieving this goal. However, the intrinsic transparent photoactive layer typically incurs exciton utilization penalty which requires the CuSCN in replacement of PEDOT:PSS to form an additional exciton splitting interface. Herein, we study the CuSCN-based OSC in the D-poor region for potential over 60% AVT. Though CuSCN produces higher short-circuit current density (JSC) than PEDOT:PSS as hole-transporting layer (HTL), the lower fill factor (FF) and its light-healing behavior suppress the power conversion efficiency (PCE) value. Detailed recombination analysis and Cu valence state comparison confirm the hole-trap at CuSCN/photoactive interface as the determinant reason for FF loss and its light-healing behavior. Targeted p-type doping close to the interface increases the FF in CuSCN-based PM6:L8-BO (0.10:1) OSC from 56.0% to 62.1% and mitigates the light-healing phenomenon as well as stability problem by hole-trap passivation. Taking advantage of the improved CuSCN device, a semitransparent OSC (ST-OSC) with an AVT exceeding 55% and an appealing LUE of 2.66% is fabricated.
{"title":"Optimizing CuSCN/photoactive interface towards efficient semitransparent organic solar cell with 55% average visible transmittance","authors":"Xin Tan, Fei Xue, Xin Qin, Wei Ma, Han Yan","doi":"10.1016/j.nanoen.2026.111776","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111776","url":null,"abstract":"Developing highly-transparent organic solar cell (OSC) with an average visible transmittance (AVT) over 55% and a reasonable light utilization efficiency (LUE) over 2.50% is vital to enlarge its application scenarios for commercialization. Reducing electron-donor (D) content in photoactive layer represents a primary strategy for achieving this goal. However, the intrinsic transparent photoactive layer typically incurs exciton utilization penalty which requires the CuSCN in replacement of PEDOT:PSS to form an additional exciton splitting interface. Herein, we study the CuSCN-based OSC in the D-poor region for potential over 60% AVT. Though CuSCN produces higher short-circuit current density (<em>J</em><sub><em>SC</em></sub>) than PEDOT:PSS as hole-transporting layer (HTL), the lower fill factor (FF) and its light-healing behavior suppress the power conversion efficiency (PCE) value. Detailed recombination analysis and Cu valence state comparison confirm the hole-trap at CuSCN/photoactive interface as the determinant reason for FF loss and its light-healing behavior. Targeted p-type doping close to the interface increases the FF in CuSCN-based PM6:L8-BO (0.10:1) OSC from 56.0% to 62.1% and mitigates the light-healing phenomenon as well as stability problem by hole-trap passivation. Taking advantage of the improved CuSCN device, a semitransparent OSC (ST-OSC) with an AVT exceeding 55% and an appealing LUE of 2.66% is fabricated.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"75 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-05DOI: 10.1016/j.nanoen.2026.111775
Jihun Jeon, Momoko Urano, Shusuke Bando, Hiroki Ogawa, Hideo Ohkita, Hyung Do Kim
The emergence of nonfullerene acceptors (NFAs), particularly Y6 derivatives, has propelled organic photovoltaics (OPVs) to power conversion efficiency (PCE) exceeding 20%. However, these highly efficient NFAs exhibit strong aggregation in the solid state, often leading to suboptimal morphology and restricted charge transport. To address this issue, liquid or solid additives are commonly introduced during film fabrication; however, the mechanisms by which different additives regulate NFA aggregation remain elusive. Herein, the relationship between photovoltaic performance and NFA aggregation in the state-of-the-art PM6/L8-BO blend systems is investigated using 1,8-diiodooctane (DIO, liquid additive) and 1,4-diiodobenzene (DIB, solid additive) as representative additives. As a result, DIO is found to promote excessive L8-BO aggregation, leading to reduced photoluminescence quenching efficiency and charge mobility, which deteriorates photovoltaic performance. In contrast, DIB does not directly promote aggregation but acts as a plasticizer for PM6, lowering its glass transition temperature, and thereby enabling controlled L8-BO aggregation during thermal annealing. In-situ absorption spectroscopy during spin coating suggests that DIO facilitates liquid–liquid phase separation, whereas DIB regulates aggregation indirectly through polymer softening. These findings clarify the distinct roles of liquid and solid additives in morphology regulation, providing new insights for designing highly efficient OPVs via precise control of active layer aggregation.
{"title":"Impact of Additive-Induced Nonfullerene Acceptor Aggregation on Photovoltaic Performance in Organic Photovoltaics","authors":"Jihun Jeon, Momoko Urano, Shusuke Bando, Hiroki Ogawa, Hideo Ohkita, Hyung Do Kim","doi":"10.1016/j.nanoen.2026.111775","DOIUrl":"https://doi.org/10.1016/j.nanoen.2026.111775","url":null,"abstract":"The emergence of nonfullerene acceptors (NFAs), particularly Y6 derivatives, has propelled organic photovoltaics (OPVs) to power conversion efficiency (PCE) exceeding 20%. However, these highly efficient NFAs exhibit strong aggregation in the solid state, often leading to suboptimal morphology and restricted charge transport. To address this issue, liquid or solid additives are commonly introduced during film fabrication; however, the mechanisms by which different additives regulate NFA aggregation remain elusive. Herein, the relationship between photovoltaic performance and NFA aggregation in the state-of-the-art PM6/L8-BO blend systems is investigated using 1,8-diiodooctane (DIO, liquid additive) and 1,4-diiodobenzene (DIB, solid additive) as representative additives. As a result, DIO is found to promote excessive L8-BO aggregation, leading to reduced photoluminescence quenching efficiency and charge mobility, which deteriorates photovoltaic performance. In contrast, DIB does not directly promote aggregation but acts as a plasticizer for PM6, lowering its glass transition temperature, and thereby enabling controlled L8-BO aggregation during thermal annealing. In-situ absorption spectroscopy during spin coating suggests that DIO facilitates liquid–liquid phase separation, whereas DIB regulates aggregation indirectly through polymer softening. These findings clarify the distinct roles of liquid and solid additives in morphology regulation, providing new insights for designing highly efficient OPVs via precise control of active layer aggregation.","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":"25 1","pages":""},"PeriodicalIF":17.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：