Table 1.

Layer structure of ultra thin a-Si:H solar cell (from bottom to top).

Layer (shape) ${}^{\mathrm{Reference}}$	Thickness (nm)
Silver, Ag (thin-film)47	$t_{\mathrm{Ag}}=200$
Indium zinc oxide, AZO (thin-film)48	$t_{\mathrm{AZO}}=100$
n-type aSi:H, n-aSi:H (thin-film)49	$t_{\mathrm{n}-\mathrm{aSi}:\mathrm{H}}=22$
i-type aSi:H, i-aSi:H (thin-film)49	$t_{\mathrm{i}-\mathrm{aSi}:\mathrm{H}}=150$
p-type aSi:H, p-aSi:H (thin-film)49	$t_{\mathrm{p}-\mathrm{aSi}:\mathrm{H}}=17$
Indium tin oxide, ITO (thin-film)50	$t_{\mathrm{ITO}}=70$
Glass, ${\text{SiO}}_2$ (substrate)51	$t=\infty$