Contributions of poly(3-hexylthiophene) nanowires to alteration of vertical inhomogeneity of bulk-heterojunction active layers and improvements of light-harvesting and power-conversion efficiency of organic solar cells

Joe, Sung-yoon and Ryu, Shinyoung and Nguyen, Duc Cuong and Yim, Jong Hyuk and Jeong, Huiseong and Ha, Na Young and Ahn, Y.H. and Park, Ji-Yong and Lee, Soonil (2017) Contributions of poly(3-hexylthiophene) nanowires to alteration of vertical inhomogeneity of bulk-heterojunction active layers and improvements of light-harvesting and power-conversion efficiency of organic solar cells. Organic Electronics, 42 . pp. 372-378. ISSN 1566-1199

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Abstract

We report a 47.1% efficiency improvement resulting from the combination of device-architecture modification and inclusion of poly(3-hexylthiophene-2,5-diyl) nanowires (P3HT NWs) in bulk heterojunction (BHJ) active layers (ALs). Modelling of ellipsometry spectra shows substantial changes in inhomogeneity and optical constants of BHJ ALs with P3HT-NW inclusion. Furthermore, finite-difference time-domain simulation results based on actual device structures with inhomogeneous AL models indicate that enhanced light harvesting is a main contributing factor to efficiency improvement. On the contrary, P3HT-NW inclusion has no significant effect on charge carrier collection, other than suppressing occurrence of cul-de-sac in hole-transport pathways and unfavourable indene-C60 bisadduct domains near top anodes.

Item Type:	Article
Subjects:	Scopus-indexed journals ISI-indexed journals
Divisions:	Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User:	Dr. Duc Cuong Nguyen
Date Deposited:	15 Nov 2018 09:20
Last Modified:	15 Nov 2018 09:20
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/3146

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