Efficiency enhancement in small molecule bulk heterojunction organic solar cells via additive

被引：50

作者：

Fan, Haijun ^{[1
,2
]}

Shang, Huixia ^{[1
,2
]}

Li, Yongfang ^{[1
]}

Zhan, Xiaowei ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 13期

关键词：

NANOSCALE PHASE-SEPARATION; MORPHOLOGY;

D O I：

10.1063/1.3491268

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Improved performance of small molecule bulk heterojunction (BHJ) organic solar cells based on 4,7-bis(2-triphenylamino-3-dodecyl-thiophene-5-yl)-benzo [c][1,2,5]thiadiazole (TTBTT)/PC71BM (1: 3, w/w) blend has been obtained by using 1,8-octanedithiol (ODT) as a processing additive. Based on the analysis of absorption spectrum, charge transport, and film morphology, the 30% enhancement in power conversion efficiency (PCE) via 1% ODT addition is attributed to aggregated domain formation, enhanced absorption, improved hole mobility, and more balanced charge transport. Finally, a PCE as high as 2.86% was achieved, which is among the top reported for solution-processed small molecule BHJ organic solar cells. (C) 2010 American Institute of Physics. [doi:10.1063/1.3491268]

引用

页数：3

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