Elevated efficiency and stability of hole-transport-layer-free perovskite solar cells induced by phenethylammonium iodide

文献情報

出版日 2023-12-06

DOI 10.1039/D3TA07077H

インパクトファクター 12.732

著者

Qingbo Wei, Zhangwen Ye, Yixuan Gao, Nannan Wang, Lina Feng, Qingxia Zhao, Xiufang Hou, Lingxing Zan, Feng Fu, Dong Yang

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要旨

Despite organic–inorganic hybrid perovskite devices having reached a photoelectric conversion efficiency (PCE) of 26.1%, their high cost and poor stability limit their industrial applications. Density functional theory (DFT) calculation reveals that the major defects originate from the lead vacancy (VPb) on the perovskite film surface. Therefore a two-dimensional material, phenethylammonium iodide (PEAI), was applied to passivate Pb2+ defects in the perovskite film. Theoretical studies show that uncoordinated Pb2+ can be effectively passivated, and in the meanwhile PEAI binds to iodine vacancies (VI) on the perovskite film surface through Lewis base–acid interactions, resulting in a significant decrease in trap density and a prolonged charge lifetime. The PEAI passivation leads to interfacial hole transfer, causing the band edge of the perovskite to move upward. We designed and constructed PSCs with carbon electrodes without hole transport layers, achieving the highest PCE of 17.27% and excellent stability. This strategy provides a useful reference for elevating the PCE and stability of perovskite cells.

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

Elevated efficiency and stability of hole-transport-layer-free perovskite solar cells induced by phenethylammonium iodide

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