A model for efficient, semiconductor-free solar cells via supersensitized electron transfer cascades in photogalvanic devices.
A model for efficient, semiconductor-free solar cells via supersensitized electron transfer cascades in photogalvanic devices.
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通过光电器件中的超敏电子转移级联实现高效、无半导体太阳能电池的模型。
DOI:
10.1039/c3cp00072a
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Halls JE
中科院分区:
文献类型:
--
作者:
Halls JE
A mathematical model for a photosynthesis-inspired regenerative photogalvanic device, for transient rather than exclusively steady-state conditions, based on molecular electrochemistry rather than electron transfer processes involving semiconductors, is considered within this work and which is adapted from an experimental system previously developed (J. E. Halls and J. D. Wadhawan, Energy Environ. Sci., 2012, 5, 6541). Computational simulations suggest that pragmatically achievable systems behave as middle-of-the-range photo-rechargeable electrochemical capacitors for light-to-electrical energy storage; in contrast the system performance as a light-to-electrical energy convertor (viz., solar cell), for cells constructed from electrochemically reversible redox couples with fast photo-induced electron transfer reactions is critically dependent on the concentration of the supersensitiser; maximum power conversion efficiency of ca. 6.5% under 500 nm light, 2.4 mW cm−2 intensity for typical experimental parameters, neglecting Ohmic losses, and employing galvanostatic discharge, with a power conversion efficiency that is capable of being increased by a factor of five (to ca. 34%) when the supersensitizer concentration increases by an order of magnitude (from 5.0 to 50.0 mM). Under an AM 2.0 solar spectrum, numerical simulations suggest that one potentially pragmatically achievable embodiment of this regenerative system is able to perform with a solar-to-electrical power conversion efficiency of 4.5% – an attractive realistic single cell value.
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DOI:
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发表时间:
1989
期刊:
影响因子:
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作者:
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通讯作者:
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1993
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1995
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2011
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Chimia (Basel)
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