Citation: Xin Dong, Zhijin Xu, Jing Liang, Tianqi Chen, Junhua Luo, Lina Li. Bulk anomalous photovoltaic induced pyro-phototronic effect in lead-free chiral perovskite for enhanced self-powered photodetection[J]. Chinese Chemical Letters, ;2026, 37(8): 111268. doi: 10.1016/j.cclet.2025.111268 shu

Bulk anomalous photovoltaic induced pyro-phototronic effect in lead-free chiral perovskite for enhanced self-powered photodetection

Xin Dong ^{a, b} ,
Zhijin Xu ^{a, b} ,
Jing Liang ^a ,
Tianqi Chen ^a ,
Junhua Luo ^{a, b, c} ,
Lina Li ^{a, b, c, *,}

a.
State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
b.
University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, China
c.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350002, China

lilina@fjirsm.ac.cn

Received Date: 15 February 2025
Revised Date: 22 April 2025
Accepted Date: 27 April 2025
Available Online: 27 April 2025

Figures(5)

The bulk anomalous photovoltaic effect (BAPV) in non-centrosymmetric materials can produce photovoltage exceeding the bandgap, distinguishing them from traditional semiconductors and offering substantial potential in photovoltaics. Chiral hybrid perovskites, characterized by asymmetric structure and structural tunability, present promise to generate BAPV with desired optoelectronic properties. Herein, we introduced chiral (S)- and (R)-α-methylbenzylamine (S/R-α-MBA) cations to construct a pair of lead-free chiral-polar perovskites, denoted as (S-α-MBA)₄Bi₂I₁₀ and (R-α-MBA)₄Bi₂I₁₀ (1S and 1R). Remarkably, 1S and 1R exhibited the distinctive BAPV effect with an impressive photovoltage of 15 V, highlighting the potential for prominent photovoltaic performance. Furthermore, self-powered broadband photoresponse is realized via photo-induced pyroelectricity based on inherent spontaneous polarization in 1S and 1R. The fabricated photodetectors demonstrated enhanced photocurrent response compared to those relying on the photovoltaic effect alone. This innovation eliminates the confinement of photodetection by material semiconductor properties, thereby effectively broadening their application scope.
- Lead-free,
- Chiral-polar hybrid perovskites,
- Bulk anomalous photovoltaic effect,
- Pyro-phototronic effect,
- Self-powered photodetection
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