Planar structure of organic photodetector for low dark current  

作　　者：Mohammad Nofil Amirul Ashraf Md Sabri Fadlan Arif Natashah Tahani M Bawazeer Mohammad S Alsoufi Nur Adilah Roslan Azzuliani Supangat 

机构地区：[1]Low Dimensional Materials Research Centre,Department of Physics,Faculty of Science,Universiti Malaya,Kuala Lumpur,50603,Malaysia [2]Department of Chemistry,Faculty of Applied Science,Umm Al-Qura University,Makkah,Saudi Arabia [3]Mechanical Engineering Department,College of Engineering and Islamic Architecture,Umm Al-Qura University,Makkah,Saudi Arabia [4]Department of Physics,Faculty of Science,Universiti Putra Malaysia,Serdang,43400,Malaysia

出　　处：《Chinese Physics B》2025年第2期290-295,共6页中国物理B(英文版)

基　　金：financial support from the Ministry of Science,Technology and Innovation with Grant No. MOSTI004-2023SRF。

摘　　要：The focus of this study is on investigating the vanadyl 2,9,16,23-tetraphenoxy-29H, 31H-phthalocyanine(VOPc Ph O)and its blend with o-xylenyl C60 bis-adduct(OXCBA), for use as a lateral ultraviolet organic photodetector. The research focuses on improving dark current reduction, which is a challenge in lateral organic photodetector. By integrating the OXCBA, low dark current values of 4.83 nA·cm^(-2)(D_(shot)^(*)= 1.414 × 10^(11)Jones) have been achieved as compared to the stand-alone VoPcPhO device of 14.06 nA·cm^(-2). The major contributing factors to dark current reduction are due to the efficient charge transfer at the photoactive-electrode interface, the deep highest occupied molecular orbital(HOMO)level of OXCBA, which leads to favorable energy level alignments hindering hole injection, and the occurrence of bulk heterojunction vertical phase segregation between VOPcPhO and OXCBA. These findings shed light on the relationship between the organic photoconductor's material composition, morphology, and performance metrics and open new avenues for metal phthalocyanine-based lateral ultraviolet organic photodetectors with low dark current and enhanced performance.

关 键 词：small molecule dark current ultra-violet(UV)sensor device physics 

分 类 号：TN23[电子电信—物理电子学] TB322[一般工业技术—材料科学与工程]