Low Detection Limit Circularly Polarized Light Detection Realized by Constructing Chiral Perovskite/Si Heterostructures

Author:

Wu Jianbo123,Zhang Xinyuan123,You Shihai12ORCID,Zhu Zeng‐Kui12,Zhu Tingting12,Wang Ziyang12,Li Ruiqing123,Guan Qianwen123,Liang Lishan12,Niu Xinyi12,Luo Junhua1234ORCID

Affiliation:

1. State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian P. R. China

2. Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 P. R. China

3. University of Chinese Academy of Sciences 100049 Beijing P. R. China

4. Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang Jiangxi 330022 P. R. China

Abstract

AbstractChiral perovskites have been demonstrated as promising candidates for direct circularly polarized light (CPL) detection due to their intrinsic chirality and excellent charge transport ability. However, chiral perovskite‐based CPL detectors with both high distinguishability of left‐ and right‐handed optical signals and low detection limit remain unexplored. Here, a heterostructure, (R‐MPA)2MAPb2I7/Si (MPA = methylphenethylamine, MA = methylammonium) is constructed, to achieve high‐sensitive and low‐limit CPL detection. The heterostructures with high crystalline quality and sharp interface exhibit a strong built‐in electric field and a suppressed dark current, not only improving the separation and transport of the photogenerated carriers but also laying a foundation for weak CPL signals detection. Consequently, the heterostructure‐based CPL detector obtains a high anisotropy factor up to 0.34 with a remarkably low CPL detection limit of 890 nW cm−2 under the self‐driven mode. As a pioneering study, this work paves the way for designing high‐sensitive CPL detectors that simultaneously have great distinguishing capability and low detection limit of CPL.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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