标题:Effects of various donor:acceptor blend ratios on photophysical properties in non-fullerene organic bulk heterojunctions
作者:Wen, Zhenchuan; Ma, Xuejian; Yang, Xiaoyu; Bi, Pengqing; Niu, Mengsi; Zhang, Kangning; Feng, Lin; Hao, Xiaotao
作者机构:[Wen, Zhenchuan; Ma, Xuejian; Yang, Xiaoyu; Bi, Pengqing; Niu, Mengsi; Zhang, Kangning; Feng, Lin; Hao, Xiaotao] Shandong Univ, State Key Lab Crystal 更多
通讯作者:Hao, XT
通讯作者地址:[Hao, XT]Shandong Univ, State Key Lab Crystal Mat, Sch Phys, Jinan 250100, Shandong, Peoples R China.
来源:CHINESE CHEMICAL LETTERS
出版年:2019
卷:30
期:5
页码:995-999
DOI:10.1016/j.cclet.2019.01.028
关键词:Photophysical properties; Non-fullerene; Bulk heterojunctions; Various; blend ratios; Organic solar cells
摘要:The composition ratio of donor and acceptor materials in organic bulk heterojunction (BHJ) is one of the key parameters to govern the performance in organic solar cells (OSCs). Therefore, high-performance non-fullerene organic bulk heterojunction consisting of poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene))-co-(1,3-di(5-thiophene-2-yl)-5,7-bis(2-ethylhexyl) benzo[1,2-c:4,5-e]clithiophene-4,8-dione)] (PBDB-T) and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2',3'-d']-s-indaceno[1,2-b:5,6-bq-dithio-phene (ITIC) are used to investigate the correlation among various donor: acceptor (D:A) ratios, photophysical properties and photovoltaic performance. Interestingly, the function of short-circuit current (J(sc)) and D:A ratios demonstrates an axisymmetric trend. When the blending ratio of D:A deviates from the optimal ratio, the symmetrically decreased J(sc) is derived from a reduction in the D:A interface or amorphous region. Research on the steady-state photoluminescence (PL), the time-resolved fluorescence spectroscopy measurements, atomic force microscopic (AFM) and grazing-incidence small angle X-rays scattering (GIWAXS) indicates no significant variation in energy loss in the process of changing D:A ratios in BHJs. With high donor or acceptor content, the domain size improves significantly, but the distance of pi-pi stacking corresponding to molecular packing has not changed significantly, and the bi-continuous percolation pathways were not obviously influenced. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
收录类别:SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061309029&doi=10.1016%2fj.cclet.2019.01.028&partnerID=40&md5=9489818c236273241ec6fc3cd4ba0d14
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