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Efficient fullerene-free solar cells with wide optical band gap polymers based on fluorinated benzotriazole and asymmetric benzodithiophene
Liu, Zhe1; Liu, Deyu2,4; Zhang, Kaili1; Zhu, Tingting1; Zhong, Yaqian1; Li, Feng3; Li, Yonghai2; Sun, Mingliang1; Yang, Renqiang2
2017-11-07
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
卷号5期号:41页码:21650-21657
摘要In this work, alpha- and beta-position naphthalene substituents as side chains on asymmetric BDT were used as donor building blocks to build wide bandgap (WBG) donor materials (P alpha NBDT-T1 and P beta NBDT-T1) with fluorinated benzotriazole (T1) as the acceptor unit. The two co-polymers were used to build polymer solar cells (PSCs) with PC71BM or ITIC acceptor material. In ITIC acceptor material based devices, the P alpha NBDT-T1 co-polymer with a larger dihedral angle between main backbone and naphthalene ring achieved a higher power conversion efficiency (PCE) of 9.60% with improved short-circuit current density (J(SC)) and fill factor (FF) compared with P beta NBDT-T1, which was ascribed to the excellent morphology of the blended film. The open circuit voltage (V-OC) was also maintained at a decent level upon introducing these naphthalene rings due to their high ionization potential and low electron density. Interestingly, for PC71BM based devices, the two polymers show a reverse situation compared with an ITIC system. The P beta NBDT-T1 with a small dihedral angle between the main backbone and naphthalene rings shows a slightly higher performance than P alpha NBDT-T1. However, in the PC71BM system, both polymers did not exhibit ideal optical performance due to their unmatched absorption spectrum. These phenomena indicate that the asymmetric BDTs have great potential towards achieving high optical performance with non-fullerene acceptor materials.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c7ta07390a
关键词[WOS]POWER CONVERSION EFFICIENCY ; MOLECULE ELECTRON-ACCEPTORS ; ORGANIC PHOTOVOLTAICS ; ACHIEVE ; DONOR
收录类别SCI
语种英语
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
项目资助者NSFC(51773220 ; 51573205 ; 21274134)
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号WOS:000413734800004
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qibebt.ac.cn/handle/337004/9695
专题先进有机功能材料团队
作者单位1.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
3.Qingdao Univ Sci & Technol, Sch Polymer Sci & Engn, Minist Educ Shandong Prov, Key Lab Rubber Plast, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Liu, Zhe,Liu, Deyu,Zhang, Kaili,et al. Efficient fullerene-free solar cells with wide optical band gap polymers based on fluorinated benzotriazole and asymmetric benzodithiophene[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(41):21650-21657.
APA Liu, Zhe.,Liu, Deyu.,Zhang, Kaili.,Zhu, Tingting.,Zhong, Yaqian.,...&Yang, Renqiang.(2017).Efficient fullerene-free solar cells with wide optical band gap polymers based on fluorinated benzotriazole and asymmetric benzodithiophene.JOURNAL OF MATERIALS CHEMISTRY A,5(41),21650-21657.
MLA Liu, Zhe,et al."Efficient fullerene-free solar cells with wide optical band gap polymers based on fluorinated benzotriazole and asymmetric benzodithiophene".JOURNAL OF MATERIALS CHEMISTRY A 5.41(2017):21650-21657.
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