Low-cost and high-performance selenium indoor photovoltaics
Literature Information
Zongbao Li, Mingjie Feng, Bin Yan
Selenium (Se), as the world's oldest photovoltaic material, has reemerged as a promising absorber material for indoor photovoltaics (IPVs) due to its suitable wide bandgap of ∼1.9 eV, nontoxicity, and excellent inherent stability. However, despite the low material cost of Se, conventional high-performance Se photovoltaic devices usually employ high-cost Au as the electrode, significantly increasing the cost of Se-based devices and restricting their future commercialization. Here we replace high-cost Au with low-cost Cu as the electrode, reducing the cost of Se devices by about one order of magnitude. We further introduce an isolation layer of MoOx between Se and Cu films; this prevents the reaction between Se and Cu to form CuSe during the thermal evaporation of Cu, which significantly lowers the device performance. The resulting Se cells achieve an efficiency of 10.4% under indoor illumination at 500 lux, comparable to that of Au electrode-based Se devices and superior to that of the current IPV industry standard of commercialized amorphous silicon cells with indoor photovoltaic efficiency below 10%. Unencapsulated devices also exhibit negligible efficiency loss after 1000 h of storage under ambient conditions.
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Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment














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