a-Si:H/µc-Si:H tandem junction based photocathodes with high open-circuit voltage for efficient hydrogen production
作者： Félix Urbain , Vladimir Smirnov , Jan-Philipp Becker , Uwe Rau , Friedhelm Finger
DOI: 10.1557/JMR.2014.308
关键词: Materials science 、 Amorphous silicon 、 Silicon 、 Plasma-enhanced chemical vapor deposition 、 Optoelectronics 、 Thin film 、 Analytical chemistry 、 Photoelectrochemical cell 、 Photocurrent 、 Open-circuit voltage 、 Photovoltaic system
摘要: Thin film silicon tandem junction solar cells based on amorphous (a-Si:H) and microcrystalline (µc-Si:H) were developed with focus high open-circuit voltages for the application as photocathodes in integrated photoelectrochemical water electrolysis. By adjusting various parameters plasma enhanced chemical vapor deposition process of individual µc-Si:H single cells, we showed that a-Si:H/µc-Si:H exhibit voltage over 1.5 V energy conversion efficiency 11% at a total layer thickness below 1 µm. Our approach included reduction, controlled SiH4 profiling, incorporation intrinsic interface buffer layers. The applicability devices was evaluated cell. photocurrent onset potential 1.3 versus RHE short-circuit 10.0 mA/cm2. presented may provide an efficient low-cost pathway to hydrogen production.
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