Thermally induced vertical phase separation and photovoltaic characteristics of polymer solar cells for P3HT/PCBM composites

被引：6
|
作者：
Nagai, Masaru [1 ,2 ]
Wei, Huang [1 ,2 ]
Yoshida, Yuji [3 ]
机构：
[1] Nanjing Tech Univ NanjingTech, KLOFE, Jiangsu Natl SynergeticInnovat Ctr Adv Mat SICAM, Nanjing 211816, Jiangsu, Peoples R China
[2] Nanjing Tech Univ NanjingTech, IAM, Jiangsu Natl SynergeticInnovat Ctr Adv Mat SICAM, Nanjing 211816, Jiangsu, Peoples R China
[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3055565, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2016年 / 55卷 / 06期
关键词：
SELF-ORGANIZATION; THIN-FILMS; BLEND; MORPHOLOGY; EFFICIENCY; SURFACE; CRYSTALLIZATION; NANOMORPHOLOGY; PERFORMANCE; NETWORK;
D O I：
10.7567/JJAP.55.061601
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The occurrence of vertical phase separation has been reported for various spin-cast polymer films, including bulk-heterojunction films of polymer solar cells (PSCs). Focusing on real-space analysis, we conducted a study on the relationship between the morphology and processing conditions of PSCs for typical poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) cells. Our results demonstrated that spin-casting caused a localized reduction in the P3HT concentration in the bulk center. Thermal annealing after cathode formation enhanced the unevenness in concentration and created a multilayered vertical phase-separated morphology in which the P3HT domains were gathered near the electrodes, leaving only PCBM domains at the center of the film. Cells with this morphology had good power conversion efficiency (similar to 3%). (C) 2016 The Japan Society of Applied Physics
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页数：9
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