IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-10 DOI: 10.1002/elt2.70050

Sharafat Ali, Sher Ali, Ahmed Ismail, Ahmad Iqbal, Yong Wang, Syedul Hasnain Bakhtiar, Shah Rahim, Amir Zada, Asad Ali, Fazal Raziq, Huabin Zhang, Jiabao Yi, Liang Qiao

{"title":"Defective CeO2/Copper Phthalocyanine S-Scheme Heterojunctions With Molecular Copper Centers for Selective CO2-To-CO Photoconversion","authors":"Sharafat Ali, Sher Ali, Ahmed Ismail, Ahmad Iqbal, Yong Wang, Syedul Hasnain Bakhtiar, Shah Rahim, Amir Zada, Asad Ali, Fazal Raziq, Huabin Zhang, Jiabao Yi, Liang Qiao","doi":"10.1002/elt2.70050","DOIUrl":"https://doi.org/10.1002/elt2.70050","url":null,"abstract":"Simultaneously regulating charge carrier dynamics and catalytic selectivity remains a critical challenge in photocatalytic CO2 reduction. Here, we report a copper (II) phthalocyanine/oxygen-vacancy-rich (CuPc/CeO2) S-scheme heterojunction featuring atomically dispersed Cu–N4 sites. Ultraviolet photoelectron spectroscopy establishes a 0.24 eV work function difference between CeO2 and CuPc, generating a built-in electric field that drives S-scheme charge transfer. X-ray photoelectron spectroscopy confirms oxygen vacancies in CeO2 (evidenced by Ce3+ states), enabling the energetic alignment that spatially separates reductive electrons (−1.05 V vs. NHE) at molecular Cu sites from oxidative holes (+2.44 V) in CeO2. Time-resolved photoluminescence spectroscopy confirmed that the reduction in carrier lifetime (from 7.42 to 6.57 ns) corroborates an efficient charge separation process. In situ diffuse reflectance infrared Fourier-transform spectroscopy demonstrates that the Cu–N4 centers preferentially stabilize the *COOH intermediate while facilitating rapid CO desorption from Cu(I) sites, thereby directing selective two-electron reduction and suppressing over-reduction to CH4. The optimized 20CuPc/CeO2 catalyst achieves a CO generation rate of 90.23 μmol g−1 h−1—representing a 16.96-fold enhancement over pristine CeO2—with 92.2% selectivity for CO versus CH4, and maintains robust stability over five consecutive photocatalytic cycles. This work establishes a unified design strategy integrating defect-engineered S-scheme charge separation with single-atom molecular catalysis to achieve selective solar-driven CO2-to-CO conversion.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-Powered Diamond Homojunction Photodetectors for Stable Ultraviolet Sensing Under High Temperatures 高温下稳定紫外传感的自供电金刚石同结光电探测器

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-16 DOI: 10.1002/elt2.70049

Runlei Zhang, Xiaohua Chen, Pengyang Zhang, Saibin Han, Yingnan Wang, Chuanwen Song, Shuhao Yin, Lei Ge, Yan Peng, Jisheng Han, Mingsheng Xu, Xiangang Xu

{"title":"Self-Powered Diamond Homojunction Photodetectors for Stable Ultraviolet Sensing Under High Temperatures","authors":"Runlei Zhang, Xiaohua Chen, Pengyang Zhang, Saibin Han, Yingnan Wang, Chuanwen Song, Shuhao Yin, Lei Ge, Yan Peng, Jisheng Han, Mingsheng Xu, Xiangang Xu","doi":"10.1002/elt2.70049","DOIUrl":"https://doi.org/10.1002/elt2.70049","url":null,"abstract":"Ultraviolet photodetectors (UVPDs) operating at high temperatures are critical for sensing in extreme environments such as aerospace, nuclear electronic systems, and flame warning. However, most existing UVPDs suffer from severe performance degradation, increased dark current, and the need for external bias as the operating temperature rises. Here, we report a self-powered UVPD based on an unintentionally doped/boron-doped diamond homojunction. Benefitting from the ultra-wide bandgap and excellent thermal stability of the diamond, the device has achieved high optoelectrical properties under UV illumination with negligible performance degradation even at an operating temperature of up to 250°C. The device demonstrates a high rectification ratio of 1.8 × 109, high specific detectivity of over 1012 Jones, and fast response times of 3.45 ms/2.68 ms under 0 V bias. Moreover, the device shows excellent long-term operating stability and achieves high-contrast imaging applications with excellent temperature tolerance. These results highlight the promise of diamond homojunctions for reliable UV detection and imaging in harsh operating environments.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Organic Photodetectors and Sensors for Low-Light and Infrared Applications 低光和红外应用的有机光电探测器和传感器

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-10 DOI: 10.1002/elt2.70041

Swarup Biswas, Hyeok Kim

{"title":"Organic Photodetectors and Sensors for Low-Light and Infrared Applications","authors":"Swarup Biswas, Hyeok Kim","doi":"10.1002/elt2.70041","DOIUrl":"https://doi.org/10.1002/elt2.70041","url":null,"abstract":"Organic photodetectors (OPDs) and sensors have emerged as a potential class of optoelectronic devices. They are capable of detecting light at many different wavelengths, including infrared (IR) and low light. Their special advantages, which open up new possibilities for sensing technologies in the future, include mechanical flexibility, inexpensive processing, and changeable light response. Recent developments in the creation and enhancement of organic semiconducting materials are examined in detail in this article. It emphasizes molecular strategies to enhance stability, light absorption, and charge transfer in low-light conditions. High detectivity, fast reaction times, and spectrum selectivity are the main goals of the review's discussion of device architectures. It investigates important application domains such as wearable and flexible electronics, low-light environmental sensing, and biomedical imaging. In several domains, OPDs have clear benefits over conventional inorganic technologies. Major issues including long-term stability, noise reduction, and large-area integration are also discussed. The review offers ideas for possible solutions utilizing innovative material designs and interface engineering. This paper provides a thorough overview of the state and future trends of OPDs and sensors for low-light and infrared applications by tying together developments in organic materials chemistry and device physics.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-Powered Diamond Homojunction Photodetectors for Stable Ultraviolet Sensing Under High Temperatures 高温下稳定紫外传感的自供电金刚石同结光电探测器

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-16 DOI: 10.1002/elt2.70049

Runlei Zhang, Xiaohua Chen, Pengyang Zhang, Saibin Han, Yingnan Wang, Chuanwen Song, Shuhao Yin, Lei Ge, Yan Peng, Jisheng Han, Mingsheng Xu, Xiangang Xu

{"title":"Self-Powered Diamond Homojunction Photodetectors for Stable Ultraviolet Sensing Under High Temperatures","authors":"Runlei Zhang, Xiaohua Chen, Pengyang Zhang, Saibin Han, Yingnan Wang, Chuanwen Song, Shuhao Yin, Lei Ge, Yan Peng, Jisheng Han, Mingsheng Xu, Xiangang Xu","doi":"10.1002/elt2.70049","DOIUrl":"https://doi.org/10.1002/elt2.70049","url":null,"abstract":"Ultraviolet photodetectors (UVPDs) operating at high temperatures are critical for sensing in extreme environments such as aerospace, nuclear electronic systems, and flame warning. However, most existing UVPDs suffer from severe performance degradation, increased dark current, and the need for external bias as the operating temperature rises. Here, we report a self-powered UVPD based on an unintentionally doped/boron-doped diamond homojunction. Benefitting from the ultra-wide bandgap and excellent thermal stability of the diamond, the device has achieved high optoelectrical properties under UV illumination with negligible performance degradation even at an operating temperature of up to 250°C. The device demonstrates a high rectification ratio of 1.8 × 109, high specific detectivity of over 1012 Jones, and fast response times of 3.45 ms/2.68 ms under 0 V bias. Moreover, the device shows excellent long-term operating stability and achieves high-contrast imaging applications with excellent temperature tolerance. These results highlight the promise of diamond homojunctions for reliable UV detection and imaging in harsh operating environments.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfur-Rich Solid-Electrolyte Interphase in Graphite Anodes Enabled by Interfacial Sulfur Encapsulation 界面硫包封使石墨阳极中富硫固-电解质界面相成为可能

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-13 DOI: 10.1002/elt2.70054

Ao Jia, Guobin Xi, Hao Fu, Nan Wang, Guangyu Pan, Jie Wang, Yang Liu, Xinghao Zhang, Jiarui He, Yuping Wu

{"title":"Sulfur-Rich Solid-Electrolyte Interphase in Graphite Anodes Enabled by Interfacial Sulfur Encapsulation","authors":"Ao Jia, Guobin Xi, Hao Fu, Nan Wang, Guangyu Pan, Jie Wang, Yang Liu, Xinghao Zhang, Jiarui He, Yuping Wu","doi":"10.1002/elt2.70054","DOIUrl":"https://doi.org/10.1002/elt2.70054","url":null,"abstract":"Conventional solid-electrolyte interphase (SEI) on graphite anodes inherently suffers from sluggish interfacial kinetics, severely restricting their rate capability and operational lifespan. However, existing strategies for SEI engineering typically involve either complex multistep procedures, high feedstock costs, or stringent safety requirements, leaving a critical need for a practical approach. Herein, we develop a facile molten-phase method to construct a functional sulfur-rich SEI through homogeneous sulfur encapsulation followed by electrochemical activation. Such an engineered interphase effectively facilitates rapid ion conduction and minimizes interfacial impedance. Benefiting from the synergistic advantages, the Gr@S anode exhibits substantially enhanced lithium intercalation capacity and superior cycling stability relative to pristine graphite, enabling improved electrochemical performance. This work underscores the critical role of SEI engineering in advancing practical anode materials and establishes a promising pathway toward high-performance lithium-ion batteries.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfur-Rich Solid-Electrolyte Interphase in Graphite Anodes Enabled by Interfacial Sulfur Encapsulation 界面硫包封使石墨阳极中富硫固-电解质界面相成为可能

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-13 DOI: 10.1002/elt2.70054

Ao Jia, Guobin Xi, Hao Fu, Nan Wang, Guangyu Pan, Jie Wang, Yang Liu, Xinghao Zhang, Jiarui He, Yuping Wu

{"title":"Sulfur-Rich Solid-Electrolyte Interphase in Graphite Anodes Enabled by Interfacial Sulfur Encapsulation","authors":"Ao Jia, Guobin Xi, Hao Fu, Nan Wang, Guangyu Pan, Jie Wang, Yang Liu, Xinghao Zhang, Jiarui He, Yuping Wu","doi":"10.1002/elt2.70054","DOIUrl":"https://doi.org/10.1002/elt2.70054","url":null,"abstract":"Conventional solid-electrolyte interphase (SEI) on graphite anodes inherently suffers from sluggish interfacial kinetics, severely restricting their rate capability and operational lifespan. However, existing strategies for SEI engineering typically involve either complex multistep procedures, high feedstock costs, or stringent safety requirements, leaving a critical need for a practical approach. Herein, we develop a facile molten-phase method to construct a functional sulfur-rich SEI through homogeneous sulfur encapsulation followed by electrochemical activation. Such an engineered interphase effectively facilitates rapid ion conduction and minimizes interfacial impedance. Benefiting from the synergistic advantages, the Gr@S anode exhibits substantially enhanced lithium intercalation capacity and superior cycling stability relative to pristine graphite, enabling improved electrochemical performance. This work underscores the critical role of SEI engineering in advancing practical anode materials and establishes a promising pathway toward high-performance lithium-ion batteries.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revisiting Open-Circuit Voltage in Heterojunction-Scarce Organic Solar Cells 异质结稀缺有机太阳能电池开路电压研究

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-13 DOI: 10.1002/elt2.70053

Zeyu Wang, Chao Zhao, Wei Ma, Han Yan

{"title":"Revisiting Open-Circuit Voltage in Heterojunction-Scarce Organic Solar Cells","authors":"Zeyu Wang, Chao Zhao, Wei Ma, Han Yan","doi":"10.1002/elt2.70053","DOIUrl":"https://doi.org/10.1002/elt2.70053","url":null,"abstract":"Organic solar cells (OSCs) have reached power conversion efficiencies (PCEs) above 21%, yet their market adoption is still limited by reliability issues rooted in the unstable bulk heterojunction (BHJ) architecture. Recent Y-series nonfullerene acceptors enable bulk photocarrier generation and open a pathway toward heterojunction-scarce active layers with improved uniformity and stability. However, the widely used charge-transfer state analysis and the simplified Schottky-junction model become insufficient to describe the open-circuit voltage (VOC) in such systems. Here we develop a unified framework that couples composition-dependent density of state (DOS) redistribution with geminate recombination to explain VOC when donor/acceptor (D/A) interfaces are scarce. DOS evolution governs Fermi-level (EF) alignment and sets the upper limit of VOC, whereas enhanced geminate recombination in weakly interfaced blends limits the achievable quasi-Fermi level splitting. This model reconciles the opposite VOC trends and fill factor degradation observed in D- and A-poor PM6:Y6 and PCE10:Y6 devices. Guided by these insights, electrode work function engineering strengthens internal fields, suppresses geminate loss, and yields a record-low energy loss of 0.516 eV in PM6:Y6 cells. This framework clarifies voltage losses beyond the BHJ paradigm and provides design rules for reliable high-efficiency heterojunction-scarce OSCs.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Organic Photodetectors and Sensors for Low-Light and Infrared Applications 低光和红外应用的有机光电探测器和传感器

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-10 DOI: 10.1002/elt2.70041

Swarup Biswas, Hyeok Kim

{"title":"Organic Photodetectors and Sensors for Low-Light and Infrared Applications","authors":"Swarup Biswas, Hyeok Kim","doi":"10.1002/elt2.70041","DOIUrl":"https://doi.org/10.1002/elt2.70041","url":null,"abstract":"Organic photodetectors (OPDs) and sensors have emerged as a potential class of optoelectronic devices. They are capable of detecting light at many different wavelengths, including infrared (IR) and low light. Their special advantages, which open up new possibilities for sensing technologies in the future, include mechanical flexibility, inexpensive processing, and changeable light response. Recent developments in the creation and enhancement of organic semiconducting materials are examined in detail in this article. It emphasizes molecular strategies to enhance stability, light absorption, and charge transfer in low-light conditions. High detectivity, fast reaction times, and spectrum selectivity are the main goals of the review's discussion of device architectures. It investigates important application domains such as wearable and flexible electronics, low-light environmental sensing, and biomedical imaging. In several domains, OPDs have clear benefits over conventional inorganic technologies. Major issues including long-term stability, noise reduction, and large-area integration are also discussed. The review offers ideas for possible solutions utilizing innovative material designs and interface engineering. This paper provides a thorough overview of the state and future trends of OPDs and sensors for low-light and infrared applications by tying together developments in organic materials chemistry and device physics.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enabling Ultrastable Microbubbles With Graphene Aerogel Enrichment and Machine Learning for Highly Efficient Carbon Storage 利用石墨烯气凝胶富集和机器学习实现超稳定微泡，实现高效碳储存

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-21 DOI: 10.1002/elt2.70048

Mohammad Hossein Akhlaghi, Malek Naderi, Ali Pilehvar Meibody, Shurui Yang, Mojtaba Abdi-Jalebi

{"title":"Enabling Ultrastable Microbubbles With Graphene Aerogel Enrichment and Machine Learning for Highly Efficient Carbon Storage","authors":"Mohammad Hossein Akhlaghi, Malek Naderi, Ali Pilehvar Meibody, Shurui Yang, Mojtaba Abdi-Jalebi","doi":"10.1002/elt2.70048","DOIUrl":"https://doi.org/10.1002/elt2.70048","url":null,"abstract":"Microbubbles (MBs) have garnered significant attention across various scientific disciplines, including medical imaging, drug delivery, materials science, and environmental engineering due to their unique properties and versatile utility. However, their inherent limitations regarding stability and pressure resilience have impeded their potential application in demanding conditions. Here, an innovative paradigm is presented for next-generation CO2-filled ultrastable microbubbles (UMBs) by incorporating hydrophobic graphene aerogel microparticles (HAG-MPs) into the aphron MB shells, resulting in MBs with exceptional resilience and longevity. The findings demonstrate that the reinforced UMBs, enhanced with 0.16 wt% HAG-MPs, display a significantly improved elastic response and mechanical stiffness so that these UMBs exhibit remarkable bubble survival rates of approximately 71% and exhibit an amazing 490% increase in cyclic pressure stability (about 6 times) under a high-pressurizing cycle up to 400 bar. This research serves as a catalyst for the creation of advanced UMB systems capable of revolutionizing diverse applications in carbon capture, storage, and utilization. Furthermore, a multi-output machine learning (ML) framework based on multi-target regressor stacking (MTRS) is developed to predict key UMB performance parameters, achieving prediction errors as low as 3% for half-life time, approximately 4% for shell thickness-to-diameter ratio, and 3% for cyclic pressure stability, representing up to an 82% reduction in prediction error compared to classical single-output ML methods.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revisiting Open-Circuit Voltage in Heterojunction-Scarce Organic Solar Cells 异质结稀缺有机太阳能电池开路电压研究

IF 15.2

Electron Pub Date : 2026-08-04 Epub Date: 2026-05-13 DOI: 10.1002/elt2.70053

Zeyu Wang, Chao Zhao, Wei Ma, Han Yan

{"title":"Revisiting Open-Circuit Voltage in Heterojunction-Scarce Organic Solar Cells","authors":"Zeyu Wang, Chao Zhao, Wei Ma, Han Yan","doi":"10.1002/elt2.70053","DOIUrl":"https://doi.org/10.1002/elt2.70053","url":null,"abstract":"Organic solar cells (OSCs) have reached power conversion efficiencies (PCEs) above 21%, yet their market adoption is still limited by reliability issues rooted in the unstable bulk heterojunction (BHJ) architecture. Recent Y-series nonfullerene acceptors enable bulk photocarrier generation and open a pathway toward heterojunction-scarce active layers with improved uniformity and stability. However, the widely used charge-transfer state analysis and the simplified Schottky-junction model become insufficient to describe the open-circuit voltage (VOC) in such systems. Here we develop a unified framework that couples composition-dependent density of state (DOS) redistribution with geminate recombination to explain VOC when donor/acceptor (D/A) interfaces are scarce. DOS evolution governs Fermi-level (EF) alignment and sets the upper limit of VOC, whereas enhanced geminate recombination in weakly interfaced blends limits the achievable quasi-Fermi level splitting. This model reconciles the opposite VOC trends and fill factor degradation observed in D- and A-poor PM6:Y6 and PCE10:Y6 devices. Guided by these insights, electrode work function engineering strengthens internal fields, suppresses geminate loss, and yields a record-low energy loss of 0.516 eV in PM6:Y6 cells. This framework clarifies voltage losses beyond the BHJ paradigm and provides design rules for reliable high-efficiency heterojunction-scarce OSCs.","PeriodicalId":100403,"journal":{"name":"Electron","volume":"4 3","pages":""},"PeriodicalIF":15.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/elt2.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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