Title

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

Authors

Authors

Z. J. Hu; S. Tang; A. Ahlvers; S. I. Khondaker;A. J. Gesquiere

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

PHOTOCURRENT GENERATION; EFFICIENCY; BLENDS; MORPHOLOGY; Physics, Applied

Abstract

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]

Journal Title

Applied Physics Letters

Volume

101

Issue/Number

5

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000307676600087

ISSN

0003-6951

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