Flexible Photodetector Arrays Based on Patterned CH3 NH3 PbI3- x Clx Perovskite Film for Real-Time Photosensing and Imaging

Wenqiang Wu; Xiandi Wang; Xun Han; Zheng Yang; Guoyun Gao; Yufei Zhang; Jufang Hu; Yongwen Tan; Anlian Pan; Caofeng Pan

doi:10.1002/adma.201805913

Flexible Photodetector Arrays Based on Patterned CH₃ NH₃ PbI_3- _x Cl_x Perovskite Film for Real-Time Photosensing and Imaging

Adv Mater. 2019 Jan;31(3):e1805913. doi: 10.1002/adma.201805913. Epub 2018 Nov 28.

Authors

Wenqiang Wu^{1

2}, Xiandi Wang^{1

3}, Xun Han¹, Zheng Yang¹, Guoyun Gao¹, Yufei Zhang¹, Jufang Hu¹, Yongwen Tan⁴, Anlian Pan², Caofeng Pan^{1

3

5

6}

Affiliations

¹ 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, 100083, P. R. China.
² Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082, P. R. China.
³ School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
⁴ Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082, P. R. China.
⁵ Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, Guangxi, 530004, P. R. China.
⁶ College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.

PMID: 30485566
DOI: 10.1002/adma.201805913

Abstract

The quest for novel deformable image sensors with outstanding optoelectronic properties and large-scale integration becomes a great impetus to exploit more advanced flexible photodetector (PD) arrays. Here, 10 × 10 flexible PD arrays with a resolution of 63.5 dpi are demonstrated based on as-prepared perovskite arrays for photosensing and imaging. Large-scale growth controllable CH₃ NH₃ PbI_3- _x Cl_x arrays are synthesized on a poly(ethylene terephthalate) substrate by using a two-step sequential deposition method with the developed Al₂ O₃ -assisted hydrophilic-hydrophobic surface treatment process. The flexible PD arrays with high detectivity (9.4 × 10¹¹ Jones), large on/off current ratio (up to 1.2 × 10³ ), and broad spectral response exhibit excellent electrical stability under large bending angle (θ = 150°) and superior folding endurance after hundreds of bending cycles. In addition, the device can execute the functions of capturing a real-time light trajectory and detecting a multipoint light distribution, indicating that it has widespread potential in photosensing and imaging for optical communication, digital display, and artificial electronic skin applications.

Keywords: flexible; imaging; perovskite film; photodetector arrays; real-time light trajectory.

Abstract

Grants and funding