K. Vamsi Krishna, S. Sritanvi, N. Reddy, S. Reddy, Deepika Nandyala, Anand Pandarinath, G. Nagakumari, R. Mahesh, P. Venugopal Reddy, Vinay Kandrapu
Using the density functional theory, a first-principle approach, the structural, electronic, and optical properties of the double perovskites A2BX6 (A= Cs; B=Sn; X=Cl, Br, and I) were calculated. Calculated parameters lattice constants and band gaps agree with experimental and theoretical observations. The band gap of the A2BX6 compounds is within the optimal range for single-junction photovoltaic applications. The ideal band gap, high dielectric constants, and optimum light absorption of these perovskites make them suitable for high performance single and multi-junction perovskite solar cells
利用密度泛函理论，第一性原理方法，研究了双钙钛矿A2BX6 (a = Cs;B = Sn;X=Cl, Br, I)。计算的参数、晶格常数和带隙与实验和理论观测结果一致。A2BX6化合物的带隙在单结光伏应用的最佳范围内。这些钙钛矿理想的带隙、高介电常数和最佳的光吸收使它们适合高性能的单结和多结钙钛矿太阳能电池
{"title":"Electronic and optical properties of double perovskites A2BX6 (A = Cs; B = Sn, and (X = Cl, Br, I.) using modified Becke Johonson potential study","authors":"K. Vamsi Krishna, S. Sritanvi, N. Reddy, S. Reddy, Deepika Nandyala, Anand Pandarinath, G. Nagakumari, R. Mahesh, P. Venugopal Reddy, Vinay Kandrapu","doi":"10.1117/12.2632942","DOIUrl":"https://doi.org/10.1117/12.2632942","url":null,"abstract":"Using the density functional theory, a first-principle approach, the structural, electronic, and optical properties of the double perovskites A2BX6 (A= Cs; B=Sn; X=Cl, Br, and I) were calculated. Calculated parameters lattice constants and band gaps agree with experimental and theoretical observations. The band gap of the A2BX6 compounds is within the optimal range for single-junction photovoltaic applications. The ideal band gap, high dielectric constants, and optimum light absorption of these perovskites make them suitable for high performance single and multi-junction perovskite solar cells","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"76 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120992359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polyethylenimine (PEI) is sometimes used as a passivation layer at the interface between ZnO electron transport layer and quantum-dots emission layer in quantum-dots light emitting devices (QDLEDs). We recently find that blending ZnO with PEI (ZnO:PEI) is advantageous over using it in a separate layer in terms of device stability. In this work, a comparative study between the ZnO:PEI with a neat ZnO ETL is conducted. The ZnO:PEI ETL results in improvement in both EQE and lifetime of QDLEDs compared to the ZnO ETL. By replacing the ZnO ETL with the ZnO:PEI ETL, delayed EL measurements reveal changes in charge distribution across the QDLED. Applying a reverse bias pulse shows that the reversible delayed EL components in the QDLED with the ZnO:PEI ETL stemmed from the electrons placed in a hole transport layer (HTL). The electrons in the HTL induce an annihilation of accumulated holes at the QD EML/HTL that can be a cause of device degradation. The result provides a new insight into the importance of managing charge distribution across the QDLED via ZnO ETL modification for realizing highly stable QDLEDs.
{"title":"Modulation in charge distribution via polyethylenimine-incorporation into ZnO electron transport layer and its impact on quantum-dots light emitting device stability","authors":"Dongsub Chung, H. Aziz","doi":"10.1117/12.2631581","DOIUrl":"https://doi.org/10.1117/12.2631581","url":null,"abstract":"Polyethylenimine (PEI) is sometimes used as a passivation layer at the interface between ZnO electron transport layer and quantum-dots emission layer in quantum-dots light emitting devices (QDLEDs). We recently find that blending ZnO with PEI (ZnO:PEI) is advantageous over using it in a separate layer in terms of device stability. In this work, a comparative study between the ZnO:PEI with a neat ZnO ETL is conducted. The ZnO:PEI ETL results in improvement in both EQE and lifetime of QDLEDs compared to the ZnO ETL. By replacing the ZnO ETL with the ZnO:PEI ETL, delayed EL measurements reveal changes in charge distribution across the QDLED. Applying a reverse bias pulse shows that the reversible delayed EL components in the QDLED with the ZnO:PEI ETL stemmed from the electrons placed in a hole transport layer (HTL). The electrons in the HTL induce an annihilation of accumulated holes at the QD EML/HTL that can be a cause of device degradation. The result provides a new insight into the importance of managing charge distribution across the QDLED via ZnO ETL modification for realizing highly stable QDLEDs.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"215 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116304364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel beam steering angle expander is demonstrated by cascading two polymeric liquid crystal polarization lenses with different diopters. The lens module functions as a planar telescope, which offers some attractive features such as high precision, lightweight, and low cost. The magnifier offers wide-angle, continuous steering when integrated with an active fine-angle beam steering device. The potential application for LiDAR is emphasized.
{"title":"Liquid crystal beam steering devices for LiDAR applications","authors":"Yannanqi Li, Zhenyi Luo, Shin‐Tson Wu","doi":"10.1117/12.2633683","DOIUrl":"https://doi.org/10.1117/12.2633683","url":null,"abstract":"A novel beam steering angle expander is demonstrated by cascading two polymeric liquid crystal polarization lenses with different diopters. The lens module functions as a planar telescope, which offers some attractive features such as high precision, lightweight, and low cost. The magnifier offers wide-angle, continuous steering when integrated with an active fine-angle beam steering device. The potential application for LiDAR is emphasized.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121253344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Mrukiewicz, O. Iadlovska, S. Shiyanovskii, O. Lavrentovich
We demonstrate experimentally that diffraction of light incident obliquely at the oblique helicoidal cholesteric (ChOH) structure results in scattering at both the half- (P/2) and the full pitch (P) periodicities. Transmission spectra at P and P/2 are observed in the Vis spectral range, tunable by the electric field and the angle of light incidence. Diffraction at P/2 shows two distinct spectral bands for p- and s-polarized incident light. Diffraction at P is a single wide band. Unique optical properties of ChOH are attractive for applications such as electrically tunable band-pass filters, optical rotators, and beam-steering devices.
{"title":"Diffraction of obliquely incident light at oblique helicoidal cholesteric","authors":"M. Mrukiewicz, O. Iadlovska, S. Shiyanovskii, O. Lavrentovich","doi":"10.1117/12.2637321","DOIUrl":"https://doi.org/10.1117/12.2637321","url":null,"abstract":"We demonstrate experimentally that diffraction of light incident obliquely at the oblique helicoidal cholesteric (ChOH) structure results in scattering at both the half- (P/2) and the full pitch (P) periodicities. Transmission spectra at P and P/2 are observed in the Vis spectral range, tunable by the electric field and the angle of light incidence. Diffraction at P/2 shows two distinct spectral bands for p- and s-polarized incident light. Diffraction at P is a single wide band. Unique optical properties of ChOH are attractive for applications such as electrically tunable band-pass filters, optical rotators, and beam-steering devices.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126188591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metalated phthalocyanines (MPcs) are a special class of organic semiconductors having unique chemical structures and properties. The material’s conjugated 18-π electron structure enables a strong fusion with carbon nano tubes (CNTs) which have a highly delocalized π electron structure. This strong binding between MPc and CNT facilitates the study of the material in an electrochemical cell. Here in this account, we report a novel method of identifying the selectivity and sensitivity trend of several MPcs with different metal cores through an electrochemical approach. Sensor electrode was prepared by drop casting the MPc solution on paper strips coated with CNT ink, and then tested in electrochemical cell in a 2-electrode fashion. The nature of the redox reactions between MPc and the VOC analytes (i.e., acetone, ethanol, isopropanol, and methanol) were studied through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry. Four different metalated phthalocyanines (CoPc, CuPc, MgPc, and ZnPc) are studied here. Experimental results suggest large shift in conductivity in the CoPc sensor upon exposure to ethanol, MgPc sensor upon exposure to isopropanol, and ZnPc sensor upon exposure to acetone.
{"title":"Toward chemical sensing: an electrochemical study of the selectivity trend of metal phthalocyanines","authors":"M. S. Hossain, A. Takshi","doi":"10.1117/12.2633101","DOIUrl":"https://doi.org/10.1117/12.2633101","url":null,"abstract":"Metalated phthalocyanines (MPcs) are a special class of organic semiconductors having unique chemical structures and properties. The material’s conjugated 18-π electron structure enables a strong fusion with carbon nano tubes (CNTs) which have a highly delocalized π electron structure. This strong binding between MPc and CNT facilitates the study of the material in an electrochemical cell. Here in this account, we report a novel method of identifying the selectivity and sensitivity trend of several MPcs with different metal cores through an electrochemical approach. Sensor electrode was prepared by drop casting the MPc solution on paper strips coated with CNT ink, and then tested in electrochemical cell in a 2-electrode fashion. The nature of the redox reactions between MPc and the VOC analytes (i.e., acetone, ethanol, isopropanol, and methanol) were studied through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry. Four different metalated phthalocyanines (CoPc, CuPc, MgPc, and ZnPc) are studied here. Experimental results suggest large shift in conductivity in the CoPc sensor upon exposure to ethanol, MgPc sensor upon exposure to isopropanol, and ZnPc sensor upon exposure to acetone.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128240207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Ishiyama, Y. Kobayashi, H. Nakamura, M. Aizawa, K. Hisano, S. Kubo, A. Shishido
Functional soft materials with controlled molecular alignment are attracting much attention in various fields due to their excellent flexibility and functional properties. Among conventional alignment methods, mechanical methods such as rubbing the polymer surface are well-known as a facile route to align various molecules. Besides, photoalignment methods, using photoresponsive molecules and polarized light, enable precise alignment control towards advanced functions. As a novel alignment method combining the advantages of both mechanical and photoalignment methods, we have developed scanning wave photopolymerization (SWaP) where phototriggered molecular diffusion is applied to align molecules. Since it uses the molecular diffusion as a driving force for alignment control, SWaP has the potential to align a variety of molecules. For further exploration of the mechanism, it is necessary to understand the polymer properties; thus, the synthesis of polymers applicable to solution-based analyses is highly desired. In this study, we conducted SWaP to synthesize soluble liquid-crystalline polymer films with one-dimensional alignment. Furthermore, we compared the molecular alignment behavior between SWaP and the conventional rubbing alignment technique using a soluble polymer, and revealed that only SWaP can induce a unidirectional molecular alignment in film.
{"title":"Solubility and molecular alignment behavior of liquid-crystalline polymers by scanning wave photopolymerization","authors":"T. Ishiyama, Y. Kobayashi, H. Nakamura, M. Aizawa, K. Hisano, S. Kubo, A. Shishido","doi":"10.1117/12.2635808","DOIUrl":"https://doi.org/10.1117/12.2635808","url":null,"abstract":"Functional soft materials with controlled molecular alignment are attracting much attention in various fields due to their excellent flexibility and functional properties. Among conventional alignment methods, mechanical methods such as rubbing the polymer surface are well-known as a facile route to align various molecules. Besides, photoalignment methods, using photoresponsive molecules and polarized light, enable precise alignment control towards advanced functions. As a novel alignment method combining the advantages of both mechanical and photoalignment methods, we have developed scanning wave photopolymerization (SWaP) where phototriggered molecular diffusion is applied to align molecules. Since it uses the molecular diffusion as a driving force for alignment control, SWaP has the potential to align a variety of molecules. For further exploration of the mechanism, it is necessary to understand the polymer properties; thus, the synthesis of polymers applicable to solution-based analyses is highly desired. In this study, we conducted SWaP to synthesize soluble liquid-crystalline polymer films with one-dimensional alignment. Furthermore, we compared the molecular alignment behavior between SWaP and the conventional rubbing alignment technique using a soluble polymer, and revealed that only SWaP can induce a unidirectional molecular alignment in film.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129208366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the increasing interest in wearable electronics, still, building electronic circuits on fabrics is challenging. Among different approaches, fiber shape electrochemical transistors are potentially suitable for various applications, particularly for bioelectronics. Fiber-based devices are getting popular because of their low fabrication cost, lightweight, and mechanical flexibility without losing their properties as sensors and transistors. In this work, we have studied an organic electrochemical transistor made from two conductive threads with a gel electrolyte. The transistor was tested when it was exposed to an acidic solution which then showed a change in the drain current. The results from testing the conductive thread between the drain and source reviled the effect of the pH on the PEDOT:PSS coating used as the semiconducting material in the transistor design. The results are encouraging for the applications in new low-cost, flexible bioelectronics sensing devices.
{"title":"Stability of fiber-based organic electrochemical transistors with a gel electrolyte for wearable electronics","authors":"Nestor O. Marquez Rios, A. Takshi","doi":"10.1117/12.2633175","DOIUrl":"https://doi.org/10.1117/12.2633175","url":null,"abstract":"With the increasing interest in wearable electronics, still, building electronic circuits on fabrics is challenging. Among different approaches, fiber shape electrochemical transistors are potentially suitable for various applications, particularly for bioelectronics. Fiber-based devices are getting popular because of their low fabrication cost, lightweight, and mechanical flexibility without losing their properties as sensors and transistors. In this work, we have studied an organic electrochemical transistor made from two conductive threads with a gel electrolyte. The transistor was tested when it was exposed to an acidic solution which then showed a change in the drain current. The results from testing the conductive thread between the drain and source reviled the effect of the pH on the PEDOT:PSS coating used as the semiconducting material in the transistor design. The results are encouraging for the applications in new low-cost, flexible bioelectronics sensing devices.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"451 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132023229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Oscar Vivanco-Galván, Yuliana Jiménez-Gaona, D. Castillo, Hernán Lucero
Cinchona officinalis L. is one of the most important and historically medicinal plants from which the antimalarial drug known as quinine is extracted. It is currently an endangered species. Thus, in vitro culture techniques are applied to propagate the species and to evaluate the effect of artificial light on the physiological development of C. Officinalis L. under controlled conditions. In that sense, the current study has determined the impact of blue led light on the enhancement of growth and number of shoots of Cinchona officinalis L. In vitro explants of C. Officinalis L were cultured on Murashige and Skoog (MS) medium and cultured under the white (control) and blue light-emitting diodes (LED) light. After eight weeks, growth and bud numbers were determined in C. officinalis L. Interestingly, blue light treatment increased the shoot length and bud numbers in comparison with the control. Incorporating blue light during in vitro propagation of C. Officinalis L can be a beneficial way to increase plant quality. Future perspectives could include the impact of blue light on the production of secondary metabolites, activities of antioxidant enzymes, and protein expression of in vitro-grown C. Officinalis L.
{"title":"Blue LED light enhances the growth of Cinchona officinalis L. cultured in vitro","authors":"Oscar Vivanco-Galván, Yuliana Jiménez-Gaona, D. Castillo, Hernán Lucero","doi":"10.1117/12.2633167","DOIUrl":"https://doi.org/10.1117/12.2633167","url":null,"abstract":"Cinchona officinalis L. is one of the most important and historically medicinal plants from which the antimalarial drug known as quinine is extracted. It is currently an endangered species. Thus, in vitro culture techniques are applied to propagate the species and to evaluate the effect of artificial light on the physiological development of C. Officinalis L. under controlled conditions. In that sense, the current study has determined the impact of blue led light on the enhancement of growth and number of shoots of Cinchona officinalis L. In vitro explants of C. Officinalis L were cultured on Murashige and Skoog (MS) medium and cultured under the white (control) and blue light-emitting diodes (LED) light. After eight weeks, growth and bud numbers were determined in C. officinalis L. Interestingly, blue light treatment increased the shoot length and bud numbers in comparison with the control. Incorporating blue light during in vitro propagation of C. Officinalis L can be a beneficial way to increase plant quality. Future perspectives could include the impact of blue light on the production of secondary metabolites, activities of antioxidant enzymes, and protein expression of in vitro-grown C. Officinalis L.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132511025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Two-dimensional (2D) perovskites with organic spacer ligands are promising materials with superior stability and diversity for various photovoltaic devices. While traditional perovskite precursor solutions using high boiling point solvents easily cause poor uniformity, we demonstrate a new method for rapid crystallization of 2D perovskite by adopting low boiling point solvents. Our results show that 2D perovskite films have a high quality and their processing is simplified and shortened. Photoconductors are made based on the 2D perovskite films and applied in visible light and X-ray detection effectively. These findings suggest the easily processed 2D perovskites promising for practical optoelectronic applications.
{"title":"Crystallized 2D perovskite for x-ray and visible light detection applications","authors":"Lebin Nie, Jiayun Sun, Gang Li, Kai Wang, W. Choy","doi":"10.1117/12.2632581","DOIUrl":"https://doi.org/10.1117/12.2632581","url":null,"abstract":"Two-dimensional (2D) perovskites with organic spacer ligands are promising materials with superior stability and diversity for various photovoltaic devices. While traditional perovskite precursor solutions using high boiling point solvents easily cause poor uniformity, we demonstrate a new method for rapid crystallization of 2D perovskite by adopting low boiling point solvents. Our results show that 2D perovskite films have a high quality and their processing is simplified and shortened. Photoconductors are made based on the 2D perovskite films and applied in visible light and X-ray detection effectively. These findings suggest the easily processed 2D perovskites promising for practical optoelectronic applications.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130430366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cholesteric liquid crystals (CLCs) show a polarization-sensitive photonic band gap (selective reflection band), the band edges exhibiting resonant optical modes for circularly polarized light. In a theoretical treatment, we discuss the optics of cholesteric ring resonators, where the light is confined to a closed path along the cholesteric helix, which is bent into a circle. Apart from the well-known cavity and band-edge resonances, introduction of an artificial defect (defect layer and/or discontinuity of the director orientation) gives rise to additional resonant modes inside the photonic band gap (defect modes). Such systems show a unique combination of ring cavity, band edge, and defect mode resonances.
{"title":"Cholesteric ring resonators","authors":"J. Schmidtke","doi":"10.1117/12.2632230","DOIUrl":"https://doi.org/10.1117/12.2632230","url":null,"abstract":"Cholesteric liquid crystals (CLCs) show a polarization-sensitive photonic band gap (selective reflection band), the band edges exhibiting resonant optical modes for circularly polarized light. In a theoretical treatment, we discuss the optics of cholesteric ring resonators, where the light is confined to a closed path along the cholesteric helix, which is bent into a circle. Apart from the well-known cavity and band-edge resonances, introduction of an artificial defect (defect layer and/or discontinuity of the director orientation) gives rise to additional resonant modes inside the photonic band gap (defect modes). Such systems show a unique combination of ring cavity, band edge, and defect mode resonances.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"364 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133522999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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