The impact of plasmonic Ag−Au bimetallic nanoparticles on photocurrent enhancement in GaN-based photodetectors  

作　　者：Thi Kim Oanh Vu Thi Thu Phuong Bui Ngoc Anh Nguyen Thi Thanh Bao Nguyen Thi Minh Hien Nguyen Eun Kyu Kim 

机构地区：[1]No.10 Dao Tan,Institute of Physics,Vietnam Academy of Science and Technology,No.10 Dao Tan,Hanoi 118000,Vietnam [2]Graduate University of Science and Technology,Vietnam Academy of Science and Technology,18 Hoang Quoc Viet,Hanoi 122300,Vietnam [3]Department of Physics and Research Institute for Natural Sciences,Hanyang University,Seoul 04763,Republic of Korea

出　　处：《Journal of Semiconductors》2024年第12期72-78,共7页半导体学报（英文版）

基　　金：supported by the Physics development program grant funded by Vietnam Academy of Science and Technology (VAST) (KHCBVL.06/24-25);support by the Korea Evaluation Institute of Industrial Technology (KEIT)grant funded by the Korean government (MOTIE) (No.RS-2022-00143570).

摘　　要：Recently,there has been considerable interest in high-efficiency ultraviolet(UV)photodetectors for their potential practical uses.In this study,a high-quality UV photodetector was fabricated using a combination of Ag and Au NPs with GaN film.The GaN film was deposited using sputtering technique,whereas Ag and Au films were grown using thermal evaporation technique.Ag-Au bimetallic nanoparticles were formed by treating them at the various annealing temperature to improve the interaction between light and the photoactive layers of the photodetectors.The optimal annealing temperature to achieve the best performance of a photodetector is 650℃.This led to a photoresponsivity of 98.5 A/W and the ON/OFF ratio of 705 at low bias voltage of 1 V.This work establishes the foundation for the advancement of high-performance UV photodetectors.

关 键 词：UV photodetectors GaN Ag-Au bimetallic nanoparticles plasmonic effect 

分 类 号：TN23[电子电信—物理电子学] TB383.1[一般工业技术—材料科学与工程]