Performance improvement of annealing-free P3HT : PCBM-based polymer solar cells via 3-methylthiophene additive
Performance improvement of annealing-free P3HT : PCBM-based polymer solar cells via 3-methylthiophene additive
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DOI：
10.1088/0022-3727/44/36/365101
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
Bo Peng;Xia Guo;Y. Zou;Chun-yue Pan;Yongfang Li
中科院分区：
文献类型：
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作者：
Bo Peng;Xia Guo;Y. Zou;Chun-yue Pan;Yongfang Li
本文研究了3-甲基噻吩（3MT）和3-己基噻吩（3HT）添加剂对P3HT: PCBM （1:1 w/w）聚合物太阳能电池（PSCs）形貌和光伏性能的影响。添加3MT或3HT的P3HT: PCBM共混膜在500 ~ 650 nm波长范围内的吸收增强，空穴迁移率比不添加添加剂的膜高。x射线衍射数据表明，在3MT或3ht处理的薄膜中，共轭骨架的层间距离较小。原子力显微镜图像的3mt处理的薄膜显示出纳米级的相分离和互穿网络形态之间的供体和接受。未经热处理的3mt共混薄膜制得的PSCs的功率转换效率达到3.72%，比未添加添加剂的器件提高了30%。
In this work, we studied the effect of 3-methylthiophene (3MT) and 3-hexylthiophene (3HT) additives on the morphology and photovoltaic performance of the polymer solar cells (PSCs) based on P3HT : PCBM (1 : 1 w/w). The P3HT : PCBM blend films prepared from the solutions with 3MT or 3HT additive show enhanced absorption in the 500–650 nm wavelength range and higher hole mobility than that of the film without the additives. X-ray diffraction data indicate a smaller interlayer distance of the conjugated backbones in the 3MT- or 3HT-processed films. Atomic force microscopy images of the 3MT-processed films demonstrate a nanoscaled phase separation and interpenetrating network morphology between the donor and the accept phases. The power conversion efficiency of PSCs based on 3MT-processed blend films without thermal annealing reached 3.72% which is increased by 30% over that of the devices without the additive.