Power conversion efficiency enhancement of organic solar cells by addition of gold nanostars,nanorods, and nanospheres |
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Authors: | Duygu Kozanoglu Dogukan Hazar Apaydin Ali Cirpan Emren Nalbant Esenturk |
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Affiliation: | 1. Department of Micro and Nanotechnology, Middle East Technical University, Ankara 06800, Turkey;2. Department of Polymer Science and Technology, Middle East Technical University, Ankara 06800, Turkey;3. Department of Chemistry, Middle East Technical University, Ankara 06800, Turkey;4. Center for Solar Energy Research and Application, Middle East Technical University, Ankara 06800, Turkey |
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Abstract: | The effects of gold (Au) nanoparticles (NPs) with different morphologies (star, rod, sphere) incorporated into buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), of polymer-based organic solar cells (OSCs) were investigated. Solar cells having gold nanoparticles exhibited significant improvement in device efficiency relative to the reference device. The observed improvement is most likely due to the surface plasmon and enhanced light reflection and scattering properties of the Au NPs. The power conversion efficiency (PCE) is increased ca. 29% with Au nanostars, ca. 14% with Au nanorods and 11% with Au nanospheres compared to the device with no Au NP (reference device). Au nanostars provide the strongest contribution to the efficiency among all NP morphologies studied as they have large size, sharp features, and strongest localized surface plasmon resonance effect associate with their morphology. |
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Keywords: | Organic solar cell Bulk heterojunction Gold nanoparticle Nanostars Plasmonics |
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