Panchromatic photomultiplication-type organic photodetectors with planar/bulk heterojunction structure

被引：15

作者：

Guo, Dechao ^{[1
,2
]}

Yang, Liqing ^{[1
]}

Li, Ji ^{[1
]}

He, Guo ^{[1
]}

Zheng, Jingbo ^{[1
]}

Tao, Sizhe ^{[1
]}

Yang, Dezhi ^{[1
]}

Wang, Linge ^{[2
]}

Vadim, Agafonov ^{[3
]}

Ma, Dongge ^{[1
]}

机构：

[1] South China Univ Technol, Ctr Aggregat Induced Emiss,State Key Lab Luminesc, Inst Polymer Optoelect Mat & Devices,Guangdong Ho, Guangdong Prov Key Lab Luminescence Mol Aggregate, Guangzhou 510640, Peoples R China

[2] South China Univ Technol, Sch Emergent Soft Matter, South China Adv Inst Soft Matter Sci & Technol, Guangdong Prov Key Lab Funct & Intelligent Hybrid, Guangzhou 510640, Peoples R China

[3] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

来源：

SCIENCE CHINA-MATERIALS | 2023年 / 66卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

organic photodetectors; photomultiplication; panchromatic response; pulse signal; LEAD PHTHALOCYANINE; PHOTODIODES; DEVICES;

D O I：

10.1007/s40843-022-2241-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Broadband organic photodetectors (OPDs) can be integrated into various wearable devices and show great application potential in health monitoring and other fields. Here, we demonstrated high-performance broadband photomultiplication-type OPDs (PM-OPDs) based on MoO3 trapping electron-assisted hole tunneling injection mechanism with small-molecule lead (II) phthalocyanine (PbPc) and C-70 fullerene as the donor and acceptor, respectively. In order to control the crystal phase structure formed by PbPc molecules, we prepared PbPc:C-70 bulk heterojunction (BHJ) and PbPc/C-70 planar heterojunction (PHJ) devices. It can be seen that the PHJ device exhibits stronger near-infrared (NIR) absorption characteristics, which is more conducive to the formation of the triclinic phase structure of the PbPc molecule. We further prepared flat panchromatic PM-OPDs in the range of 300-1000 nm by using materials (PbPc and SubPc) with absorption complementary characteristic as the active layers and PHJ/BHJ hybrid heterojunction structure. The external quantum efficiency of the resulting panchromatic PM-OPDs exceeds 1000% in the whole spectral response range under -8 V reverse bias. Finally, we prepared flexible panchromatic PM-OPDs on polyethylene terephthalate substrate and successfully realized the detection of the human pulse signal. This work provides a new strategy for obtaining high-performance panchromatic PM-OPDs by designing device structures and selecting appropriate materials.

引用

页码：1172 / 1179

页数：8

共 46 条

[1] A near infrared organic photodiode with gain at low bias voltage [J].