Effect of processing additive on morphology and charge extraction in bulk-heterojunction solar cells

被引：39
作者：
Wang, Dong Hwan [1 ]
Morin, Pierre-Olivier [2 ]
Lee, Chang-Lyoul [3 ]
Kyaw, Aung Ko Ko [4 ,5 ]
Leclerc, Mario [2 ]
Heeger, Alan J. [3 ]
机构：
[1] Chung Ang Univ, Sch Integrat Engn, Seoul 156756, South Korea
[2] Univ Laval, Dept Chem, Quebec City, PQ G1V 0A6, Canada
[3] GIST, APRI, Kwangju 500712, South Korea
[4] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore
[5] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 36期
基金：
新加坡国家研究基金会;
关键词：
POLYMER PHOTOVOLTAIC CELLS; OPEN-CIRCUIT VOLTAGE; GRAPHENE OXIDE; EFFICIENCY; TRANSPORT; ENHANCEMENT; METHANOFULLERENE; NANOMORPHOLOGY; NETWORK;
D O I：
10.1039/c4ta03091e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effects of the 1,8-diiodooctane (DIO) processing additive on the nanomorphology, charge generation, and charge transport in the PBnDT-FTAZ/PC70BM BHJ solar cells are demonstrated. The optimized nanoscale donor-acceptor morphology is achieved with 3% DIO processing additive in the BHJ film. The BHJ film with 3% DIO exhibits efficient charge generation as indicated by the decreased PL and the associated lifetime compared to the BHJ film without DIO. The balanced charge transport decreased series resistance and balanced hole and electron mobility is also observed in the device fabricated with 3% DIO. Because of the efficient charge extraction, J(SC) and PCE of the devices are increased from 3.7 mA cm(-2) and 1.9% to 13.7 mA cm(-2) and 7%, respectively. In summary, optimized fabrication with DIO as a processing additive improves the morphology, faster charge generation, and balanced charge transport in the PBnDT-FTAZ:PC70BM BHJ film, which leads to high performance BHJ solar cells.
引用
收藏
页码：15052 / 15057
页数：6
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