Millimeter-long perovskite nanowire arrays by nanogroove-confined recrystallization seamlessly integrated into high-performance photodetectors for optical imaging  

作　　者：Pingyang Huang Wei Zhou Rui Rong Tiefeng Yang Xiangtao Chen Hanyu Liu Wanglong Mao Qiming Yang Zhanhao Liang Yanbin Chen Xingyu Wang Guofu Zhou Jinyou Xu 

机构地区：[1]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China [2]Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes,Jinan University,Guangzhou 510632,China

出　　处：《Nano Research》2025年第3期527-539,共13页纳米研究(英文版)

基　　金：financial support by the Guangdong Provincial Pearl River Talents Program(No.2019QN01C290);the Outstanding Young Scholar at South China Normal University,Guangdong Provincial Key Laboratory of Optical Information Materials and Technology under Grant(No.2023B1212060065);“Golden Seed”Extracurricular Scientific Research Project at South China Normal University(No.23HDKC06);National Center for International Research on Green Optoelectronics,MOE International Laboratory for Optical Information Technologies and the 111 Project(No.D16009).

摘　　要：The controlled growth of perovskite nanowires along predefined orientations offers significant advantages over traditional post-growth assembly strategies,facilitating their integration into compact functional devices.In this study,a nanogroove-confined recrystallization process is designed for the precise and scalable growth of oriented perovskite nanowires with millimeter lengths and high crystallinity.The process involves annealing a perovskite-containing solution sandwiched between a hydrophobic flat silicon wafer and a hydrophilic faceted sapphire wafer featuring parallel nanogrooves at 90℃under ambient conditions.By customizing the electrode design,the nanowire arrays can be seamlessly integrated into monolithic photodetectors with large detection areas or into photodetector arrays with multiple microscale detector cells on their growth substrate.This in-situ integration strategy eliminates the need for complex post-growth processing steps.The photodetectors exhibit exceptional responsivity(38.4 A·W^(−1)),detectivity(4.35×10^(13)Jones),and response times in tens of microseconds across the ultraviolet-visible-near infrared ray(UV-vis-NIR)spectrum.The seamless integration of the nanowire photodetectors opens avenues for practical applications,including high-contrast optical imaging and efficient data transmission through Morse code encoding,leveraging their high on-off current ratios and rapid response.This innovative approach streamlines the growth of highly oriented perovskite nanowires,facilitating their integration into compact optoelectronic devices.

关 键 词：PEROVSKITE nanowire photodetector methylammonium lead iodide(MAPbI_(3)) RECRYSTALLIZATION 

分 类 号：TB383[一般工业技术—材料科学与工程] TN15[电子电信—物理电子学]