Ultra-wide bandgap organic acceptor material and its application in organic UV photodetector

被引：15

作者：

Tu, Weiwei ^{[1
]}

Liu, Tang ^{[1
]}

Zhang, Zhongqiang ^{[1
]}

Wu, Gang ^{[1
]}

Chen, Hongzheng ^{[1
]}

Wang, Mang ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, State Key Lab Silicon Mat, Key Lab Macromol Synth & Functionalizat,Minist Ed, Hangzhou 310027, Peoples R China

来源：

SYNTHETIC METALS | 2016年 / 219卷

基金：

中国国家自然科学基金;

关键词：

Organic ultraviolet photodetectors; Visible-blind; Electron-withdrawing groups; Charge transfer; Heterojunction; LIGHT-EMITTING-DIODES; HIGH TRIPLET ENERGY; ULTRAVIOLET PHOTODETECTORS; SEMICONDUCTOR; WAVELENGTH; CARBAZOLE; MOLECULES; SENSORS; DESIGN;

D O I：

10.1016/j.synthmet.2016.05.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two fluorene derivatives, 2-(1,1':3',1 ''-tripheny1-5'-yl)-9,9-diphenyl-9H-fluorene (TPF) and (9,9-diphenyl-9H-fluoren-2-yl)diphenylphosphine oxide (DFPPO) with wide bandgap and good thermal stability were synthesized. The electron mobility of DFPPO is 5 times higher than that of TPF because of the introduction of the electron-withdrawing diphenylphosphine oxide group. The planar heterojunction organic ultraviolet photodetectors (UVDs) were fabricated by applying TPF or DFPPO as electron acceptor, 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) as donor. The UVDs with structure of ITO/PEDOT:PSS/C8-BTBT/DFPPO/LiF/Al presented higher ultraviolet response compared to the TPF based counterpart. Corresponding dark to light current ratio and higher sensitivity is about 179 and 0.69 mA/W under illumination of 1 mW/cm(2) 365 nm UV light and bias of -0.5 V. (C) 2016 Published by Elsevier B.V.

引用

页码：20 / 25

页数：6

共 39 条

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