Effect of hydrogen dilution on the open-circuit voltage of hydrogenated amorphous silicon solar cells

Yan, Baojie; Yang, Jeffrey; Guha, Subhendu
July 2003
Applied Physics Letters;7/28/2003, Vol. 83 Issue 4, p782
Academic Journal
The open-circuit voltage (V[sub;oc]) of hydrogenated amorphous silicon solar cells has been studied experimentally and by computer simulation. We find that band gap and defect states affect V[suboc] significantly. Hydrogen (H[sub;2]) dilution widens the band gap and reduces density of defect states; both contribute to larger V[sub;oc] and better fill factor in H[sub2] diluted solar cells. Valence band tail narrowing)could affectV[sub;oc], but is not included in this study due to lack of available data.


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