Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
DOI: https://doi.org/10.29363/nanoge.hopv.2023.206
Publication date: 30th March 2023
Halide perovskite solar cells have recently emerged as potential candidates for indoor light harvesting with high power conversion efficiencies (PCE). Almost all of the reported studies on indoor light harvesting solar cells utilize white light in the visible wavelength. [1-3] Low wavelength near-ultra-violet lights, also called black lights, are commonly used under indoor environments as decorative lights e.g. for bars, pubs, aquariums, parties, clubs, body art studios, Christmas and Halloween decorations. Despite their high photon energy, such near-UV lights have not been explored for indoor light harvesting.
We have for the first time demonstrated near-UV black light harvesting using perovskite solar cells based on the commonly used methyl ammonium lead iodide absorber. UV stable solar cells fabricated with modified electron transport layer (SnO2 + PCBM-BPhen) delivered a PCE of 26.19 % and power output approaching 1 mW/cm2, when measured under near-UV (395-400 nm) illumination of 3.76 mW/cm2. The devices retained 95.53% of their initial PCE after 24 hours near-UV exposure. [4]
This work marks the beginning of new ear of indoor near-UV harvesting solar cells that are promising for powering modern electronics integrated with IoT sensors located in UV environments such as health care, horticulture and places with near-UV black light decorations.
Aruna Ivaturi would like to greatly acknowledge UK Research and Innovation (UKRI), Engineering and Physical Sciences Research Council (EPSRC) for the Fellowship grant (EP/P011500/1); the EPSRC ECR Capital Equipment grant (EPS0179171) and ScotCHEM for funding IPCE setup.
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