Large‐Scale, Uniform‐Patterned CsCu2I3 Films for Flexible Solar‐Blind Photodetectors Array with Ultraweak Light Sensing

Author:

Lu Qiuchun12,Zhang Yufei23,Yang Guanlin4,Xiong Meiling1,Wu Wenqiang5,Xu Zhangsheng23,Lu Hui23,Liang Yegang12,He Zeping23,Yu Yang12,Mo Xiaoming1,Han Xun6ORCID,Pan Caofeng1235ORCID

Affiliation:

1. Center on Nanoenergy Research School of Physical Science and Technology Guangxi University Nanning 530004 P. R. China

2. CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‐nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 101400 P. R. China

3. School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China

4. College of Materials Science and Engineering Hunan University Changsha 410082 P. R. China

5. Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 P. R. China

6. ZJU‐Hangzhou Global Scientific and Technological Innovation Center School of Micro‐Nano Electronics Zhejiang University Hangzhou 311200 P. R. China

Abstract

AbstractCesium copper halide perovskite is one of the promising materials for solar‐blind light detection. However, most of the cesium copper halide perovskite‐based photodetectors (PDs) are focused on ultraviolet A detection and realized on the rigid substrate in the single device configuration. Here, a flexible solar‐blind PDs array (10 × 10 pixels) based on the CsCu2I3 film patterns for ultraweak light sensing and light distribution imaging is reported. Large‐scale CsCu2I3 film arrays are synthesized with various shapes and uniform dimensions through a simple vacuum‐heating‐assisted solution method. Benefiting from excellent air stability and superior resistance to the photodegrading of the CsCu2I3 film, the array device exhibits long‐term stable photoswitching behavior for 8 h and ultralow light detection capability to resolve the light intensity of 6.1 nW cm−2 with a high responsivity of 62 A W−1, and the array device can acquire clear images of “G”, “X”, and “U” showing the input light distribution. Moreover, the flame detection and warning system based on a curved solar‐blind PDs array is demonstrated, which can be used for multi‐flame monitoring and locating. These results can encourage potential applications of the CsCu2I3 film‐based PDs array in the field of optical communication and environment monitoring.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Beijing Municipality

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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