Near-infrared photoresponse sensitization of solvent additive processed poly(3-hexylthiophene)/fullerene solar cells by a low band gap polymer

被引:41
作者
Hu, Zhongjian [1 ,2 ]
Tang, Simon [1 ,2 ]
Ahlvers, Anne [1 ,2 ,3 ]
Khondaker, Saiful I. [4 ]
Gesquiere, Andre J. [1 ,2 ]
机构
[1] Univ Cent Florida, NanoSci Technol Ctr, Dept Chem, Orlando, FL 32826 USA
[2] Univ Cent Florida, CREOL, Coll Opt & Photon, Orlando, FL 32826 USA
[3] Truman State Univ, Dept Phys, Kirksville, MO 63501 USA
[4] Univ Cent Florida, Dept Phys, NanoSci Technol Ctr, Orlando, FL 32826 USA
基金
美国国家科学基金会;
关键词
PHOTOCURRENT GENERATION; EFFICIENCY; MORPHOLOGY;
D O I
10.1063/1.4742143
中图分类号
O59 [应用物理学];
学科分类号
摘要
With the aim of extending the photoresponse of the poly(3-hexylthiophene)/[6,6]-phenyl-C61-butyric acid methyl ester photovoltaic system into the near-infrared region, a low band gap polymer poly [2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene-2, 6-diyl]] was incorporated to make ternary blend solar cells. Solvent additive 1,8-diiodooctane (DIO) was applied to optimize the phase separation in a one-step active layer preparation. Devices fabricated with DIO additive demonstrate an improvement of device power conversion efficiency by 17%, which can be attributed to favorable microscopic structure of the ternary blend with 1:1:0.2 composition processed with DIO and extended absorption on the red side of the visible spectrum up to 900 nm. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4742143]
引用
收藏
页数:4
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