Suppression of trap assisted non-geminate recombination by incorporation of multilayer graphene in P3HT:PCBM for stable and efficient photovoltaic device
| Autor: | Neetu Prasad, Promod K. Bhatnagar, Koteswara Rao Peta, Joginder Singh |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Open-circuit voltage Graphene business.industry Photovoltaic system Energy conversion efficiency 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Active layer law.invention law Electrode Degradation (geology) Optoelectronics Electrical and Electronic Engineering 0210 nano-technology business Short circuit |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:18200-18208 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-9933-z |
| Popis: | In the present work, multilayer graphene (MLG) has been demonstrated to be a promising material for improvement in power conversion efficiency (PCE) as well as stability of the polymer based photovoltaic (PV) devices. MLG, when incorporated into the active layer of the P3HT:PCBM based PV device provides additional 2D pathways for long distance electron transport, avoiding interaction with holes and hence leading to suppression of non-geminate recombination in the device. PCE of the device is shown to improve by ~ 54% due to improvement in absorbance as well as by reduction in non-geminate recombination leading to ~ 8.9% increase in short circuit current density. Also, open circuit voltage improves by ~ 13.75% owing to increase in the fermi-level splitting due to large number of charge accumulated at the electrodes. MLG also reduces the rate of degradation of the device by the factor of ~ 1.5 by suppressing the effect of generation of deep trap levels in the active layer which in turn results in improving the stability of the device. |
| Databáze: | OpenAIRE |
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