Volume 17, Issue 40 2102733
Research Article

Donor–Acceptor Competition via Halide Vacancy Filling for Oxygen Detection of High Sensitivity and Stability by All-Inorganic Perovskite Films

Weiwei Xing

Weiwei Xing

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Qianqian Yao

Qianqian Yao

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Wenpeng Zhu

Corresponding Author

Wenpeng Zhu

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

E-mail: [email protected]; [email protected]; [email protected]

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He Jiang

He Jiang

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Xiaoyue Zhang

Xiaoyue Zhang

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Ye Ji

Ye Ji

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Jian Shao

Jian Shao

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Weiming Xiong

Weiming Xiong

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Biao Wang

Corresponding Author

Biao Wang

Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082 China

E-mail: [email protected]; [email protected]; [email protected]

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Bangmin Zhang

Bangmin Zhang

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Xin Luo

Xin Luo

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

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Yue Zheng

Corresponding Author

Yue Zheng

School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275 China

Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 03 September 2021
Citations: 3

Abstract

Oxygen detection by organic–inorganic halide perovskites (OIHPs) has demonstrated advantages in operating temperature, response time, and reversibility over traditional materials. However, OIHPs can only sense O2 in light and the unavoidable O2 exposure during detection easily induces the degradation of OIHPs. The trade-off between sensitivity and stability makes the OIHP-based oxygen sensors impractical. By replacing organic groups with Cs, the compact films of all-inorganic halide perovskites (AIHPs) that can adsorb O2 at grain boundaries in dark are developed. AIHPs show conductance increase of 1875.5% from 1 × 10−5 to 700 Torr of O2 pressure, associated with full reversibility and long-term stability. Combining experiments and modeling, this work reveals the donor–acceptor competition via halide vacancy filling leading to the modulation of carrier concentration and mobility. This work offers understandings on oxygen sensing by perovskite materials and paves the way for further optimization of AIHPs as promising oxygen sensors with high sensitivity and stability.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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