Blocking thin-film nonuniformities: Photovoltaic self-healing

Roussillon, Y.; Giolando, D. M.; Shvydka, Diana; Compaan, A. D.; Karpov, V. G.
January 2004
Applied Physics Letters;1/26/2004, Vol. 84 Issue 4, p616
Academic Journal
An approach is developed to block the effects of lateral nonuniformities in thin-film semiconductor structures. The nonuniformity modulates the surface photovoltage distribution. When exposed to light and immersed in a proper electrolyte, this distribution will generate laterally nonuniform electrochemical reactions. Such treatments result in a nonuniform interfacial layer that balances the original nonuniformity. This approach has been implemented for CdTe/CdS photovoltaic devices, in which it improved the device efficiency from 1%–3% to 11%–12%. © 2004 American Institute of Physics.


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