A ZnO&GeSe composite electron transport layer for organic solar cells

文献情報

出版日 2023-11-29

DOI 10.1039/D3TA05900F

インパクトファクター 12.732

著者

Jingyu Tan, Hongye Li, Yapeng Sun, Guanliang Li, Yujun Zhao, Huangzhong Yu

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要旨

In organic solar cells (OSCs), ZnO is a widely used electron transport layer (ETL), but various vacancy defects on the surface of ZnO crystals form massive trap-assisted recombination centers, which hinders electron transmission in OSCs. In this paper, a ZnO&GeSe composite is constructed by modifying ZnO with two-dimensional (2D) GeSe, and it is used for the first time as a novel ETL in OSCs, which reduces the defect density on the ZnO surface and improves the electron extraction efficiency in OSCs. The results of first-principles calculations show that GeSe can deposit additional electrons on the surface of ZnO, which stabilizes the ZnO polar surface and reduces the formation of spontaneous defects on the ZnO polar surface. The electric dipole moment formed at the interface also promotes electron transport in OSCs. The power conversion efficiency (PCE) of OSCs based on PBDB-T:ITIC and PM6:Y6 active layers increases from 10.06% and 15.20% to 11.68% and 17.51%, respectively. Meanwhile, the OSC with the ZnO&GeSe composite ETL possesses good stability compared to the device with the pure ZnO ETL. This study shows that 2D GeSe has a good application prospect as a charge transport layer, and provides an idea for the defect modification of ZnO and other semiconductor crystals by 2D materials.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

A ZnO&GeSe composite electron transport layer for organic solar cells

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Journal of Materials Chemistry A

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