Статья

Quasi‐2D Bilayer Surface Passivation for High Efficiency Narrow Bandgap Perovskite Solar Cells

Danni YuSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaQi WeiSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaHansheng LiSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaJunhan XieSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaXianyuan JiangSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaTing PanSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaHao WangSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaMengling PanSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaWenjia ZhouSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaWeimin LiuSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 ChinaPhilip C. Y. ChowDepartment of Mechanical Engineering The University of Hong Kong Pokfulam, Hong Kong 999077 ChinaZhijun NingSchool of Physical Science and Technology ShanghaiTech University 393 Middle Huaxia Road, Pudong Shanghai 201210 China

2022en

ABI

Аннотация

Abstract The combination of comprehensive surface passivation and effective interface carriers transfer plays a critical role in high‐performance perovskite solar cells. A 2D structure is an important approach for surface passivation of perovskite film, however, its large band gap could compromise carrier transfer. Herein, we synthesize a new molecule 2‐thiopheneethylamine thiocyanate (TEASCN) for the construction of bilayer quasi‐2D structure precisely on a tin‐lead mixed perovskite surface. This bilayer structure can passivate the perovskite surface and ensure effective carriers transfer simultaneously. As a result, the open‐circuit voltage ( V oc ) of the device is increased without sacrificing short‐circuit current density ( J sc ), giving rise to a high certified efficiency from a credible third‐party certification of narrow band gap perovskite solar cells. Furthermore, theoretical simulation indicates that the inclusion of TEASCN makes the bilayer structure thermodynamically more stable, which provides a strategy to tailor the number of layers of quasi‐2D perovskite structures.

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Идентификаторы

DOI: 10.1002/anie.202202346

Цитирования и источники

Цитирований: 2Использованных источников: 0

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