High-Performance, Flexible Perovskite Photodetector Based on CsPbBr <sub>3</sub> Nanonet
Hai Zhou, Rui Wang, Xuhui Zhang, Boao Xiao, Zihao Shuang, Dingjun Wu, Pingli Qin
Abstract
By the assistance of single-layer polystyrene (PS) spheres, high-quality CsPbBr3 perovskite nanonet films are fabricated for the construction of flexible, self-powered photodetectors (PDs) with an ITO/SnO2/CsPbBr3/carbon structure. The flexible PDs exhibit superior device performances with an ON- OFF ratio of approximately 2.58 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times \,\,10^{{4}}$ </tex-math></inline-formula> , a linear dynamic range of 102 dB, and responsivity (R) and detectivity ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{D}^{\ast }$ </tex-math></inline-formula> ) values of 0.15 A/W and 3.70 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times \,\,10^{{11}}$ </tex-math></inline-formula> Jones, respectively. Moreover, our device displays good light stability and flexible stability after 500 times of bending. These results show a reference value for fabricating stable flexible perovskite PDs.