Improvement of organic solar cell efficiency by solution-processed doping of pentacene in PEDOT:PSS layer |
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Authors: | A.K. Chilvery R. Surabhi R.B. Lal |
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Affiliation: | 1. Division of Natural Sciences and Mathematics, Talladega College, Talladega, AL, USAakchilvery@talladega.edu;3. Department of Physics, Chemistry and Mathematics, Alabama A&4. M University, Huntsville, AL, USA |
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Abstract: | In the current research, organic solar cells (OSCs) with various concentrations of pentacene in Poly(ethylenedioxythiopene):Poly(styrenesulfonate) (PEDOT:PSS) interface layer were investigated for better hole extraction. The ITO/Pentacene?+?PEDOT:PSS/P3HT:PCBM/Al-fabricated solar cell fabricated via brush coating provides superior photovoltaic, electrical and optical characteristics when compared with the ITO/PEDOT:PSS/P3HT:PCBM/Al solar cell. The ITO/Pentacene?+?PEDOT:PSS/P3HT:PCBM/Al solar cells deliver a VOC ~350?mV and 2.57% efficiency. It is observed that the optimized concentration of pentacene doping in PEDOT:PSS layer, along with an active layer of P3HT and PC60BM, doubles the efficiency of the device, when compared with pristine PEDOT:PSS layer. The degradation studies of the fabricated bulk heterojunction OSCs reveal that the degrading abilities of ITO/Pentacene?+?PEDOT:PSS/P3HT:PCBM/Al solar cells are 60% more better than those of ITO/PEDOT:PSS/P3HT:PCBM/Al devices. Thus, this work will ultimately contribute toward fully solution processed painted device, which will provide low-cost manufacturing and improved stability of pentacene-based organic photovoltaics. |
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Keywords: | pentacene brush-coating PEDOT:PSS efficiency |
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