Regulation of the performance parameters of poly(3-alkylthiophene)/[6,6]-phenyl C₆₁-butyric acid methyl ester solar cells by 1,2,3,4-bis(p-methylbenzylidene) sorbitol

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• 作者：Danhui Wang ; Nana Yuan ; Xuan Zhang ; Lin Li ; Zhishan Bo ; Jianjun Zhou ; Hong Huo ; ^{hhuo@bnu.edu.cn}
• 关键词：Nucleating agent ; MDBS ; P3AT/PCBM BHJ OPV device ; Crystallization kinetics ; Performance parameters
• 刊名：Organic Electronics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：42
• 期：Complete
• 页码：163-172
• 全文大小：1164 K
• 卷排序：42

文摘

We detailedly investigated the effect of the nucleating agent of donor material on the performance parameters of P3AT/PCBM BHJ OPV cells and explore the mechanism. We find that the addition of MDBS (nucleating agent) decreases the VOC but increases the FF and JSC, finally improves the PCE. The most fundamental reason of the varies of performance parameters of BHJ OPV cells with MDBS is that the addition of MDBS accelerate the crystallization kinetics, leads to the decrease of the crystalline size and crystallinity, and the increase of the connectivity between P3AT ordered regions. The PCE of P3OT/PCBM cells reaches 1.59% after adding 5.0 wt% MDBS, which is slight higher than the reported highest PCE (1.53%) of P3OT/PCBM cell without post-treatment. MDBS is cheap and easily accessible. It can stably and uniformly disperse in many organic solvents used for preparing polymer BHJ OPV solar cells. Our works verify that it is a new and easy way to design and improve the performance parameters of BHJ OPV devices by adding the nucleating agent which modulates the crystallization kinetics of crystalline donor materials.