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A Self‐Powered and Stable All‐Perovskite Photodetector–Solar Cell Nanosystem
Author(s) -
Lu Hao,
Tian Wei,
Cao Fengren,
Ma Yulong,
Gu Bangkai,
Li Liang
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201504477
Subject(s) - photodetector , materials science , perovskite (structure) , optoelectronics , responsivity , indium tin oxide , photovoltaic system , layer (electronics) , nanotechnology , chemical engineering , ecology , engineering , biology
Hybrid organic–inorganic perovskites have attracted intensive interest as light absorbing materials in solid‐state solar cells. Herein, we demonstrate a high‐performance CH 3 NH 3 PbI 3 ‐based perovskite photodetector constructed on the flexible indium tin oxide (ITO) coated substrate even after 200 bending cycles. The as‐fabricated devices show high responsivity, broad spectrum response from ultraviolet to whole visible light, long‐term stability, and high on‐off ratio. Particularly, atomic layer deposition technique was used to deposit the ultrathin Al 2 O 3 film on devices, functioning as a protection layer to effectively enhance the stability and durability of perovskite photodetectors. The first all‐perovskite self‐powered nanosystem was successfully assembled by integrating a perovskite solar cell with a perovskite photodetector. Driven by the perovskite solar cell, the photodetector exhibits fast and stable response to illuminated light at a low working voltage less than 1.0 V. This stable integrated nanosystem has promising applications in which photodetectors can work in harsh environments without external power sources.