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Colorful Efficient Moiré‐Perovskite Solar Cells
Author(s) -
Wang Yang,
Lan Yangjie,
Song Qian,
Vogelbacher Florian,
Xu Ting,
Zhan Yan,
Li Mingzhu,
Sha Wei E. I.,
Song Yanlin
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202008091
Subject(s) - materials science , optoelectronics , perovskite (structure) , photoactive layer , trapping , nanotechnology , optics , energy conversion efficiency , polymer solar cell , physics , chemical engineering , engineering , ecology , biology
Abstract Light harvesting is crucial for thin‐film solar cells. To substantially reduce optical loss in perovskite solar cells (PSCs), hierarchical light‐trapping nano‐architectures enable absorption enhancement to exceed the conventional upper limit and have great potential for achieving state‐of‐the art optoelectronic performances. However, it remains a great challenge to design and fabricate a superior hierarchical light‐trapping nano‐architecture, which exhibits extraordinary light‐harvesting ability and simultaneously avoids deteriorating the electrical performance of PSCs. Herein, colorful efficient moiré‐PSCs are designed and fabricated incorporating moiré interference structures by the imprinting method with the aid of a commercial DVD disc. It is experimentally and theoretically demonstrated that the light harvesting ability of the moiré interference structure can be well manipulated through changing the rotation angle (0 ° –90 ° ). The boosted short‐circuit current is credited to augment light diffraction channels, leading to elongated optical paths, and fold sunlight into the perovskite layer. Moreover, the imprinting process suppresses the trap sites and voids at the active‐layer interfaces with eliminated hysteresis. The moiré‐PSC with an optimized 30 ° rotation angle achieves the best enhancement of light harvesting (28.5% higher than the pristine), resulting in efficiencies over 20.17% (MAPbI 3 ) and 21.76% ((FAPbI 3 ) 1‐ x (MAPbBr 3 ) x ).