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题名: Effect of solvent additive on active layer morphologies and photovoltaic performance of polymer solar cells based on PBDTTT-C-T/PC71BM
作者: Guo, Xia1; Zhang, Maojie1; Ma, Wei3; Zhang, Shaoqing2; Hou, Jianhui2; Li, Yongfang1
刊名: RSC ADVANCES
发表日期: 2016
卷: 6, 期:57, 页:51924-51931
收录类别: SCI
英文摘要: Photovoltaic properties of polymer solar cells (PSCs) are strongly affected by surface and bulk morphologies of their active layers. Herein, three solvent additives with different boiling points (BP) and asymmetric solvencies with respect to the polymer donor and fullerene-based acceptor were used to control the surface and bulk morphologies of the blend active layers based on PBDTTT-C-T and PC71BM. Based on the detailed results obtained from photovoltaic measurements and morphological characterization, the correlations between the nature of the solvent additives, the surface and bulk morphologies of the blend films and the photovoltaic performance of the devices are rationally demonstrated. We found that the V-proportional to is determined by the contact surface potential, which is affected by the donor/acceptor composition at the top surface, while the J(sc) and FF are heavily influenced by the sizes and the relative compositional fluctuations of the aggregations in the blends. It was also found that the relative solvencies of the additives to the solutes and the large difference of saturated vapor pressure (P-o) values between the host solvent (o-dichlorobenzene, o-DCB) and the guest solvent (additives with high BP) play the key roles in affecting surface and bulk morphologies of the PBDTTT-C-T : PC71BM blend films. Overall, this work provides informative and useful guidance to select the best solvent additive for morphology control of polymer solar cells.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35361
Appears in Collections:高分子物理与化学实验室_期刊论文

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作者单位: 1.Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoelect Mat, Suzhou 215123, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China
3.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
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