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Three-Dimensional Optoelectronic Model for Organic Bulk Heterojunction Solar Cells

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5 Author(s)
Wee Shing Koh ; Electronics and Photonics Department , A*STAR Institute of High Performance Computing, Singapore ; Mihir Pant ; Yuriy A. Akimov ; Wei Peng Goh
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This paper describes a 3-D optoelectronic device model for organic bulk heterojunction solar cells. Three-dimensional full-wave optical simulation enables us to incorporate different modern light trapping techniques, such as subwavelength nanostructures, in a typical organic bulk heterojunction solar cell, while 3-D electrical simulation allows us to handle localized enhancement or reduction of polaron/charge generation, recombination, and transport induced by modern light trapping techniques in the device. We calibrate our model with an experimental poly (3-hexylthiophene) (P3HT):phenyl-C60-butyric acid methyl ester (PCBM) organic bulk heterojunction solar cell by tuning only one free parameter as compared with other device models, which have multiple fitting parameters. A 3-D example of a silver nanoparticle array in a typical P3HT:PCBM organic bulk heterojunction cell is also demonstrated, and the current density-voltage relation is predicted with our model.

Published in:

IEEE Journal of Photovoltaics  (Volume:1 ,  Issue: 1 )