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Improvement of the power conversion efficiency of organic photovoltaic cells with a P3HT layer fabricated by using a sonication process and having a vertically modulated nanoscale morphology

Title
Improvement of the power conversion efficiency of organic photovoltaic cells with a P3HT layer fabricated by using a sonication process and having a vertically modulated nanoscale morphology
Author
김태환
Keywords
Organic photovoltaic cells; P3HT; Rough structures; Power conversion efficiency; Nanoscale morphology; POLYMER SOLAR-CELLS; FIELD-EFFECT MOBILITY; MOLECULAR-WEIGHT; THIN-FILMS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); PERFORMANCE; POLYTHIOPHENE; NANORODS; OXIDE
Issue Date
2013-03
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation
APPLIED SURFACE SCIENCE, 2013, 268, P.156-162
Abstract
In organic photovoltaic (OPV) cells, the nanoscale morphology of the organic layer is an essential parameter governing their charge-transport properties. Optimization of the vertical composition gradient in the poly(3-hexylthiophene) (P3HT) active layer in an OPV cell with an enhanced efficiency was achieved by using different sonication times of 10, 15, 20, 25, and 30 min. Atomic force microscopy images confirmed that the sonication process increased the roughness of the P3HT layer in a vertically modulated nanoscale morphology. Photoluminescence spectra exhibited a strong peak corresponding to the P3HT particles. The power conversion efficiency of the OPV cells with a vertically modulated P3HT nanostructural layer sonicated at 15 min was enhanced by 1.04% due to an increase in the interfacial region between the acceptor and the donor materials. (C) 2012 Elsevier B. V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0169433212021964?via%3Dihubhttp://hdl.handle.net/20.500.11754/49690
ISSN
0169-4332
DOI
10.1016/j.apsusc.2012.12.045
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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