Plasmon-enhanced self-powered GaN/ZnTe core/shell nanopillar array photodetector  

作　　者：Jianqi Dong Dongqi Zhang Yi Ma Daotong You Jinping Chen Bin Liu Xingfu Wang Zengliang Shi Chunxiang Xu 

机构地区：[1]State Key Laboratory of Digital Medical Engineering,School of Biological Science and Medical Engineering,Southeast University,Nanjing 210096,China [2]Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials,National Laboratory of Solid State Microstructures,School of Electronic Science and Engineering,Nanjing University,Nanjing 210093,China [3]Institute of Photonics Technology,Jinan University,Guangzhou 510632,China [4]Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices,Institute of Semiconductors,South China Normal University,Guangzhou 510631,China

出　　处：《Nano Research》2024年第6期5569-5577,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.62075041,62375049,and 62335003);the Basic Research Program of Jiangsu Province(No.BK20222007).

摘　　要：Nanostructure photodetectors,as the core component of optoelectronic devices,are mainly focused on the precise preparation of mixed-component nano-heterostructures and the realization of zero power consumption devices.Herein,we successfully fabricated n-GaN/p-ZnTe core/shell nanopillar array and realized self-power ultraviolet/violet photodetection.The radial heterojunction nanodevice reveals high light-dark current ratio of 104 at 0 V bias,indicating effective carriers’separation.And more,by integrating plasmonic effect,the responsivity and detectivity of the Au nanoparticles decorated device are increased from 3.85 to 148.83 mA/W and 4.45×1011 to 2.33×1012 Jones under 325 nm UV light irradiation.While the rise and the fall time are decreased 1.3 times and 6.8 times under 520 nm visible light irradiation at 0 V bias.The high photocurrent gain is derived from that the oscillating high-energy hot electrons in Au nanoparticles spontaneously inject into the ZnTe conduction band to involve the photodetection process.This work presents an effective route to prepare high-performance self-power photodetector and provides a promising blueprint to realize different functional photoelectronic devices based on core/shell nanostructure.

关 键 词：GaN/ZnTe core/shell nanopillar array self-power ultraviolet/visible photodetector plasmonic effect 

分 类 号：TN15[电子电信—物理电子学]