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- Title
Broadband Photoresponses from Ultraviolet to Near‐Infrared (II) Region through Light‐induced Pyroelectric Effects in a Hybrid Perovskite.
- Authors
Guo, Wuqian; Xu, Haojie; Weng, Wen; Tang, Liwei; Ma, Yu; Liu, Yi; Hua, Lina; Wang, Beibei; Luo, Junhua; Sun, Zhihua
- Abstract
Broadband photodetection has shown a great promise for diverse applications, while the realization of plateau photoresponse from ultraviolet (UV) to near‐infrared (NIR) spectral region is very challenging. Herein, we exploit photoexcited pyroelectric effect in a chiral hybrid perovskite, (N, N‐dimethylcyclohexylammonium)PbBr3 (1), serving as a new pathway to drive broadband photoactivities. It is a room‐temperature pyroelectric with large polarization of ≈6.4 μC cm−2 and high pyroelectric figure‐of‐merits (FV=1.0×10−2 cm2 μC−1 and FD=7.1×10−5 Pa−1/2). Strikingly, light‐induced pyroelectric effect arising from spontaneous polarization is observed in 1, which cover UV (266 nm) to NIR‐II (1950 nm) full spectral region. The broadband photoresponses actualized by pyroelectricity break the limit of optical band gap. As the first demonstration of photo‐pyroelectricity covering UV‐to‐NIR spectral region in hybrid perovskites, this work paves a pathway to assemble high‐performance smart devices.
- Subjects
PEROVSKITE; PHOTOTHERMAL effect; BAND gaps; SMART devices; ULTRAVIOLET radiation; PYROELECTRICITY; OPTICAL limiting
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 52, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202213477