A thin-film silicon/silicon hetero-junction hybrid solar cell for photoelectrochemical water-reduction applications
RA Vasudevan (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Zaid Thanawala (Student TU Delft)
L Han (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Hairen Tan (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Thom Buijs (Student TU Delft)
D Deligiannis (TU Delft - Electrical Engineering, Mathematics and Computer Science)
P Perez Rodriguez (TU Delft - Electrical Engineering, Mathematics and Computer Science)
IA Digdaya (TU Delft - Applied Sciences)
WA Smith (TU Delft - Applied Sciences)
M Zeman (TU Delft - Electrical Engineering, Mathematics and Computer Science)
AHM Smets (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
A hybrid tandem solar cell consisting of a thin-film, nanocrystalline silicon top junction and a siliconheterojunction bottom junction is proposed as a supporting solar cell for photoelectrochemical applications.Tunneling recombination junction engineering is shown to be an important consideration indesigning this type of solar cell. The best hybrid cell produced has a spectral utilization of 30.6 mA cm2a JSC of 14 mA cm2, a VOC of 1.1 V, a fill factor of 0.67 and thus an efficiency of 10.3%. A high solar-tohydrogenefficiency of 7.9% can be predicted when using the hybrid cell in conjunction with current a-SiCphotocathode technology.