Insight into the Raman shifts and optical absorption changes upon annealing polymer/fullerene solar cells

被引：42

作者：

Yun, Je-Jung ^{[1
,2
]}

Peet, Jeffrey ^{[1
,2
]}

Cho, Nam-Sung ^{[1
,2
]}

Bazan, Guillermo C. ^{[1
,2
]}

Lee, Seung Joon ^{[1
]}

Moskovits, Martin ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Inst Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 25期

关键词：

D O I：

10.1063/1.2940205

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Raman shifts and optical absorption spectra of bulk heterojunction films were measured to elucidate the origin of the optimum annealing parameters. A series of device optimization studies revealed 413 K to be the optimum annealing temperature, leading to a power conversion efficiency of 2.95%. The highest power conversion efficiency coincides with the highest peak in the UV-visible absorption and the lowest full width at half maximum of the -C = C-symmetric stretching signal in the Raman spectra. The changes observed in the vibronic shifts could be useful in obtaining information about the optimal performance and processing conditions for polymer optoelectronic devices. (c) 2008 American Institute of Physics.

引用

页数：3

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