Evolved structure of thiazolothiazole based small molecules towards enhanced efficiency in organic solar cells

被引：48

作者：

Cheng, Pei ^{[1
,2
]}

Shi, Qinqin ^{[1
]}

Lin, Yuze ^{[1
,2
]}

Li, Yongfang ^{[1
]}

Zhan, Xiaowei ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

来源：

ORGANIC ELECTRONICS | 2013年 / 14卷 / 02期

关键词：

Thiazolothiazole; Triphenylamine; Small molecule; Organic solar cell; Solution process; Structure-property relationship; POWER CONVERSION EFFICIENCY; OPEN-CIRCUIT VOLTAGE; PHOTOVOLTAIC PERFORMANCE; CONJUGATED POLYMER; COPOLYMER; BENZODITHIOPHENE; SEMICONDUCTORS; DONOR; UNIT;

D O I：

10.1016/j.orgel.2012.11.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Small molecule donors T0-T2 with thiazolothiazole as acceptor unit, triphenylamine as donor unit and thiophene with different number as bridge are synthesized. With increasing thiophene number and conjugation length, these molecules exhibit red-shifted absorption (300-600 nm), slightly up-shifted HOMO levels (-5.31 to -5.28 eV), slightly down-shifted LUMO levels (-2.64 to -2.75 eV), and reduced optical band gaps (2.55-2.11 eV). Solution processed organic solar cells based on T0-T2/PC71BM (1:4, w/w) after thermal annealing exhibit power conversion efficiency up to 2.19%, 3.73% and 4.05% under AM 1.5G illumination (100 mW/cm(2)), respectively. Effects of thermal annealing on morphology, charge transport and photovoltaic property of blend films are investigated. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：599 / 606

页数：8

共 52 条

[1] Quaterthiophene-Benzobisazole Copolymers for Photovoltaic Cells: Effect of Heteroatom Placement and Substitution on the Optical and Electronic Properties [J].