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Built-in Enhancement in a-Si:H Solar Cell by Chromium Silicide Layer

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3 Author(s)
Caputo, D. ; Dept. of Electron. Eng., Univ. of Rome La Sapienza, Rome, Italy ; de Cesare, G. ; Tucci, M.

To increase the performances of amorphous silicon n-i-p solar cell, we investigate the possibility to enhance the built-in potential inserting thin high-conductivity chromium silicide layers at interfaces between metal electrodes and doped regions. We found that chromium silicide, formed on top of amorphous doped layer during chromium film evaporation, allows a reduction of activation energy of about 0.225 eV for n- and p-doped amorphous films. The activation energy reduction contributes to both built-in and open-circuit voltage enhancements, as demonstrated by comparing simulated and measured photovoltaic performances of n-i-p amorphous silicon solar cell with and without the chromium silicide layers.

Published in:

Electron Device Letters, IEEE  (Volume:31 ,  Issue: 7 )