Perylene diimide-benzodithiophene D-A copolymers as acceptor in all-polymer solar cells

被引：27
作者：
Zhang, Youdi [1 ]
Guo, Xia [1 ]
Su, Wenyan [1 ]
Guo, Bing [1 ]
Xu, Zhuo [1 ]
Zhang, Maojie [1 ]
Li, Yongfang [1 ,2 ]
机构：
[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoelect Mat, State & Local Joint Engn Lab Novel Funct Polymer, Suzhou 215123, Peoples R China
[2] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
来源：
ORGANIC ELECTRONICS | 2017年 / 41卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Perylene diimide; n-type conjugated polymers; Polymer acceptors; All-polymer solar cells; POWER CONVERSION EFFICIENCY; N-TYPE POLYMER; PHOTOVOLTAIC PROPERTIES; CONJUGATED POLYMERS; PERFORMANCE; DESIGN; DONOR; MORPHOLOGY; BENZOTHIADIAZOLE; AGGREGATION;
D O I：
10.1016/j.orgel.2016.11.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Two n-type conjugated D-A copolymers with perylene diimide (PDI) as acceptor unit and benzodithiophene (BDT) as donor unit, P(PDI-BDT-Ph) and P(PDI-BDT-Th), were synthesized and applied as electron acceptor in all-polymer solar cells (all-PSCs). P(PDI-BDT-Ph) and P(PDI-BDT-Th) films exhibit similar absorption spectra in the visible region with optical bandgap (E-g) of 1.65 eV and 1.55 eV respectively, and the identical LUMO level of -3.89 eV. The all-PSCs based on P(PDI-BDT-Ph) as acceptor and PTB7-Th as donor demonstrated a power conversion efficiency (PCE) of 4.31% with a short-circuit current density (J(sc)) of 11.94 mA cm(-2), an open-circuit voltage (V-oc) of 0.81 V, and a fill factor (FF) of 44.49%. By contrast, the corresponding all-PSCs with P(PDI-BDT-Th) as acceptor showed a relative lower PCE of 3.58% with a Jsc of 11.36 mA cm(-2), V-oc of 0.79 V, and FF of 40.00%. (C) 2016 Elsevier B.V. All rights reserved.
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页码：49 / 55
页数：7
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