Abbreviated Journal Title
Appl. Phys. Lett.
PHOTOCURRENT GENERATION; EFFICIENCY; BLENDS; MORPHOLOGY; Physics, Applied
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.
Applied Physics Letters
Hu, Zhongjian; Tang, Simon; Ahlvers, Anne; Khondaker, Saiful I.; and Gesquiere, Andre J., "Near-infrared photoresponse sensitization of solvent additive processed poly(3-hexylthiophene)/fullerene solar cells by a low band gap polymer" (2012). Faculty Bibliography 2010s. 2765.