Enhancement of Spectral Response in -:H Thin-Film Solar Cells with a-Si:H/c-Si:H P-Type Window Layers

Table 4

The external quantum efficiency at the wavelength of 400, 600, and 800 nm for the μc-Si_0.88Ge_0.12:H p-i-n single-junction solar cells with different p-type window layer.

Window layer	QE400 nm	QE600 nm	QE800 nm	(QE)
	%			mA/cm^2
μc-Si:H(p)	34.02	72.48	31.39	16.74
a-Si:H(p)/μc-Si:H(p)	40.68	79.58	41.56	19.25
a-Si:H(p)/H2 plasma/μc-Si:H(p)	39.85	78.00	32.50	17.98
H2 plasma/a-Si:H(p)/μc-Si:H(p)	22.45	65.31	26.94	14.47