Fast UV-vis-NIR photoresponse of self-oriented F_(16)CuPc nanoribbons  

作　　者：Lingyu Zhang Xingyu Wang Wei Zhou Hao Wang Jiaxun Song Zihao Zhao Jihui Liao Jian Song Yajun Li Jinyou Xu 

机构地区：[1]Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China [2]Department of Materials and Interfaces,Weizmann Institute of Science,Rehovot 76100,Israel

出　　处：《Nano Research》2023年第7期9561-9568,共8页纳米研究（英文版）

基　　金：The authors acknowledge the financial support by the 2019QN01C290;Guangdong Basic and Applied Basic Research Foundation(No.2021A1515012235);the Outstanding Young Scholar at South China Normal University,Science and Technology Program of Guangzhou(No.2019050001);Guangdong Provincial Key Laboratory of Optical Information Materials and Technology(No.2017B030301007).

摘　　要：Controlling the vapor-deposited nanoribbons to grow along a consistent orientation will enable the desired in situ integration of functional devices,representing a major technological advance compared to post-growth processing strategies.In this work,ntype F_(16)CuPc molecules are self-assembled into horizontally-oriented nanoribbons with a consistent growth axis after creating periodic hydrophobic nanogrooves on a sapphire surface.Consequently,electrodes are deposited directly on the growth substrate to enable in situ fabrication of photodetectors.Depending on the deposited electrodes,these horizontally-oriented nanoribbons are connected to form a monolithic photodetector with a large sensing area or an on-chip array of photodetectors with multiple detector units.This in situ integration strategy avoids potential structural damage and contamination from impurities associated with post-growth processing steps.Therefore,the vapor-deposited nanoribbons can retain their high quality during the device manufacturing process,which contributes to performance improvement.As a result,the in-situ integrated F_(16)CuPc photodetectors exhibit a sensitive response in the ultraviolet-visible-near-infrared(UV-vis-NIR)region.The response time is on the order of tens of milliseconds,the fastest record ever for the F_(16)CuPc-based photodetectors.Furthermore,statistics from an array of 6×6 photodetectors show little variation in their sensitivity and response time,and hence this in situ fabrication scheme will contribute to the implementation of on-chip integrated photodetectors with consistent performance based on bottom-up nanoribbons.Overall,this self-oriented growth provides a versatile option to achieve desired in-situ integrated functional devices based on bottom-up nanoribbons.

关 键 词：fluorinated copper phthalocyanine NANORIBBON planar array PHOTODETECTOR in situ integration 

分 类 号：TB383[一般工业技术—材料科学与工程]