期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201702768
关键词
absorptance; APCE; hydrogen; optical losses; water splitting
类别
资金
- Swiss Federal Office of Energy (PECHouse2 project) [SI/500090-02]
- Swiss National Science Foundation (NRP70) [407040-154002]
- European FP7 FET project PHOCS [309223]
- Swiss National Science Foundation (SNF) [407040_154002] Funding Source: Swiss National Science Foundation (SNF)
Optical losses in a photoelectrochemical (PEC) cell account for a substantial part of solar-to-hydrogen conversion losses, but limited attention is paid to the detailed investigation of optical losses in PEC cells. In this work, an optical model of combined coherent and incoherent light propagation in all layers of the PEC cell based on spectroscopic measurements is presented. Specifically, photoelectrodes using transparent conductive substrates such as F:SnO2 coated with thin absorber films are focused. The optical model is verified for hematite photoanodes fabricated by atomic layer deposition and successfully used to determine wavelength-dependent reflection, transmission, layer absorptances, and charge generation rates. Furthermore, the calculated absorptances enable 20-30% more accurate calculations of the absorbed photon-to-current efficiency of PEC cells. Our optical model is a powerful tool for the optimization of the optical performance of PEC cells focusing on single absorber or tandem configurations and represents a cornerstone of a complete (optical and electrical) model for PEC water splitting cells.
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