倍增型有机光电探测器的研究进展  

A Critical Review on Photomultiplication Type Organic Photodetectors

作　　者：王健 赵子进 杨凯旋 陈亮[1] 刘明[2] 张福俊[2] JianWang;Zi-jin Zhao;Kai-xuan Yang;Liang Chen;Ming Liu;Fujun Zhang(College of Physics and Electronic Engineering,Taishan University,Taian 271000;Key Laboratory of Luminescence and Optical Information Ministry of Education,Beijing Jiaotong University,Beijing 100044)

机构地区：[1]泰山学院物理与电子工程学院,泰安271000 [2]北京交通大学光信息与发光技术教育部重点实验室,北京100044

出　　处：《高分子学报》2022年第4期331-353,共23页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号61975006,62075155);山东省自然科学基金(基金号ZR2021MF077)资助项目.

摘　　要：介绍了倍增型有机光电探测器的发展、工作机理、性能调控及相关的应用探索.2015年张福俊课题组以单载流子传输通道的给受体混合(质量比约为100:1)薄膜为有源层,率先报道了界面附近受陷电子诱导空穴隧穿注入的倍增型有机光电探测器,并抑制了器件的暗电流密度.通过优化有源层厚度调控了界面附近受陷电荷的体分布,制备出超窄响应的倍增型有机光电探测器,并提出载流子注入窄化的新概念.利用三元策略及双层策略,制备出了宽响应倍增型有机光电探测器.利用光子俘获层调控器件的响应范围,以及利用倍增层获得了较大的外量子效率,将二极管型与倍增型器件的优势集中在一个器件中.引入光学调控层或将宽带隙材料引入有源层中,调控界面附近受陷电子分布,优化了器件的光谱形状,进而制备出响应光谱宽且平的倍增型有机光电探测器.将制备的倍增型有机光电探测器应用到心率监测、单像素成像及光开关等领域,取得较好的应用成果.This review systematically summarizes the development,working mechanism,performance optimization and relevant application exploration of photomultiplication type organic photodetectors(PM-OPDs).In 2015,Prof.Fujun Zhang’s group firstly reported PM-OPDs on the basis of active layers with single carrier transport channels.Electron traps are formed with acceptor surrounded by donor in active layers with the weight ratio of donor to acceptor as about 100:1.The working mechanism of PM-OPDs is attributed to hole tunneling injection assisted by interfacial trapped electron.Dark current density of PM-OPDs can be well suppressed due to the single carrier transport in active layers with rather less acceptor.New concept of“charge injection narrowing”was firstly proposed to prepare ultra-narrowband PM-OPDs,which is realized by adjusting thickness of active layers to control interfacial trapped electron distribution.Broadband PM-OPDs can be obtained via ternary strategy or double-layer scheme.Double-layer scheme consists of one absorption layer and one PM layer,which are individually employed to tune spectral response range of PM-OPDs and achieve external quantum efficiency greater than 100%.The advantages of photodiode type photodetectors and PM-OPDs can be integrated into one device by employing double-layer scheme.PM-OPDs with broad and flat spectral response can be achieved via optimizing interfacial trapped electron distribution,which can be regulated by inserting optical field adjusting layer or incorporating wide bandgap semiconductor materials into active layers.The PM-OPDs have been successfully applied in many fields,such as heart rate monitoring,single pixel imaging and optical switch.The successful practical applications indicate good development prospect of PM-OPDs.

关 键 词：倍增型有机光电探测器 隧穿注入 外量子效率 响应范围 

分 类 号：TN15[电子电信—物理电子学]