Journal
ENERGIES
Volume 10, Issue 4, Pages -Publisher
MDPI AG
DOI: 10.3390/en10040420
Keywords
inorganic/organic hybrid solar cells; pyramidal-structured silicon; conjugated conducting polymer; photovoltaic performance; light-harvesting efficiency
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Funding
- JSPS in Japan [26390105]
- Research Institute for Science and Technology of Tokyo Denki University in Japan [Q15E-01]
- Grants-in-Aid for Scientific Research [26390105] Funding Source: KAKEN
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Silicon (Si)/organic polymer hybrid solar cells have great potential for becoming cost-effective and efficient energy-harvesting devices. We report herein on the effects of polymer coverage and the rear electrode on the device performance of Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid solar cells with micro-pyramidal structures. These hybrid solar cells provided adequate generation of charge carriers owing to the suppression of reflectance to below 13%. Additionally, the separation of the photogenerated charge carriers at the micro-pyramidal-structured Si/PEDOT: PSS interface regions and their collection at the electrodes were dramatically improved by tuning the adhesion areas of the PEDOT: PSS layer and the rear electrode materials, thereby attaining a power conversion efficiency of 8.25%. These findings suggest that it is important to control the PEDOT: PSS coverage and to optimize the rear electrode materials in order to achieve highly efficient separation of the charge carriers and their effective collection in micro-textured hybrid solar cells.
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