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Title:
Acceptor-rich bulk heterojunction polymer solar cells with balanced charge mobilities
Author: Zhu, Tingting1,2; Zhang, Yongchao1; Li, Yonghai1; Song, Xin2; Liu, Zhe2; Wen, Shuguang1; Bao, Xichang1; Sun, Mingliang2; Yang, Renqiang1
Source: ORGANIC ELECTRONICS
Issued Date: 2017-12-01
Volume: 51, Pages:16-24
Keyword: Wide band-gap ; Acceptor-rich blend ; Polymer solar cells ; Balanced charge mobilities
DOI: 10.1016/j.orgel.2017.08.031
DOC Type: Article
English Abstract: In this work, we reported efficient polymer solar cells with balanced hole/electron mobilities tuned by the acceptor content in bulk heterojunction blend films. The photovoltaic cells were fabricated with two new wide band-gap D-A polymers PBDDIDT and PBDDIDTT as the donor material. The molecular conformations of new polymers are carefully evaluated by theoretical calculations. The results of photovoltaic studies show that two devices reach their optimal conditions with rich PC71BM content up to 80% in blend films, which is uncommon with most of reported PSCs. The as-cast devices based on PBDDIDT and PBDDIDTT reveal good photovoltaic performance with PCE of 7.04% and 6.40%, respectively. The influence of PC71BM content on photovoltaic properties is further detailed studied by photoluminescence emission spectra, charge mobilities and heterojunction morphology. The results exhibit that more efficient charge transport between donor and acceptor occurs in rich PC71BM blend films. Meanwhile, the hole and electron mobilities are simultaneously enhanced and afford a good balance in rich PC71BM blend films (D/A, 1: 4) which is critical for the improvement of current density and fill factors. (C) 2017 Elsevier B.V. All rights reserved.
WOS Headings: Science & Technology ; Technology ; Physical Sciences
WOS Subject: Materials Science, Multidisciplinary ; Physics, Applied
WOS Subject Extended: Materials Science ; Physics
WOS Keyword Plus: POWER CONVERSION EFFICIENCY ; SMALL-MOLECULE ACCEPTOR ; OPEN-CIRCUIT VOLTAGE ; HIGH-PERFORMANCE ; CONJUGATED POLYMER ; PHOTOVOLTAIC PERFORMANCE ; ELECTRON-ACCEPTORS ; ALKYL CHAINS ; DONOR ; COPOLYMERS
Indexed Type: SCI
Funder: National Natural Science Foundation of China(21502205 ; Ministry of Science and Technology of China(2016YFE0115000) ; China Postdoctoral Science Foundation(2016T90656) ; 51573205)
Language: 英语
WOS ID: WOS:000418101600004
Citation statistics:
Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/9825
Appears in Collections:先进有机功能材料团队_期刊论文

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description.institution: 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
2.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China

Recommended Citation:
Zhu, Tingting,Zhang, Yongchao,Li, Yonghai,et al. Acceptor-rich bulk heterojunction polymer solar cells with balanced charge mobilities[J]. ORGANIC ELECTRONICS,2017,51:16-24.
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