Sequential Processing: Control of Nanomorphology in Bulk Heterojunction Solar Cells

被引：114

作者：

Wang, Dong Hwan ^{[3
,4
]}

Moon, Ji Sun ^{[3
]}

Seifter, Jason ^{[3
]}

Jo, Jang ^{[3
]}

Park, Jong Hyeok ^{[1
,2
]}

Park, O. Ok ^{[4
]}

Heeger, Alan J. ^{[3
]}

机构：

[1] Sungkyunkwan Univ, Sch Chem Engn, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 440746, South Korea

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

[4] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, BK Grad Program 21, Taejon 305701, South Korea

来源：

NANO LETTERS | 2011年 / 11卷 / 08期

关键词：

Organic photovoltaic device; bulk heterojuction; bilayer mixture; layer-evolved bulk heterojunction; nanoscale morphology; interdiffused structure; cosolvent effect; ELECTRON-MICROSCOPY; PHOTOVOLTAIC DEVICES; STAMPING TRANSFER; ACIDMETHYL ESTER; POLYMER; EFFICIENCIES; PERFORMANCE; MORPHOLOGY; BILAYER;

D O I：

10.1021/nl202320r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bulk heterojunction organic photovoltaic devices based on poly[N-9 ''-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole) (PCDTBT)/[6,6]-phenyl C-70 butyric acid methyl ester (PC70BM) can be successfully fabricated by a sequential solution deposition process. When the top layer is deposited from an appropriate cosolvent, the PC70BM penetrates a predeposited bottom layer of PCDTBT during the spin-casting process, resulting in an interdiffused structure with a layer-evolved bulk heterojunction (LE-BHJ) nanomorphology. The PCDTBT:PC70BM LE-BHJ solar cells prepared with an optimized cosolvent ratio have comparable power conversion efficiency to the conventional BHJ solar cells. The nanomorphology of the optimized PCDTBT:PC70BM LE-BHJ mixture was found to have better vertical connectivity than the conventional BHJ material.

引用

页码：3163 / 3168

页数：6

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