Photo(electro)catalytic properties of high-quality halide perovskite nanocrystals
Andrés F. Gualdrón-Reyes a
a Institute of Advanced Materials (INAM), Universitat Jaume I, 12071 Castelló de la Plana, Spain
Proceedings of International Conference on Frontiers in Electrocatalytic Transformations (INTERECT)
València, Spain, 2021 November 22nd - 23rd
Organizers: Elena Mas Marzá and Ward van der Stam
Contributed talk, Andrés F. Gualdrón-Reyes, presentation 016
DOI: https://doi.org/10.29363/nanoge.interect.2021.016
Publication date: 10th November 2021

Perovskite nanocrystals (PNCs) have been highlighted as promissory materials in optoelectronics, due to improved light harvesting, photocarrier generation and the ease for tuning their optical properties, by varying their particle size and halide composition.[1] These features have opened the door to analogous solar driven process such as photo(electro)catalysis for carrying out the photodegradation of recalcitrant organic compounds more efficiently.[2] Nonetheless, there is a scarce in the state of the art about the photo(electro)chemical (PEC) properties of these materials in form of electrodes for establishing their oxidizing power in the oxidation of organics, and also it should be considered that the photocatalytic (PC) activity of PNCs mainly depends on the surface chemical environment formed during their synthesis. In this work, we show the ability of PNCs to perform photo(electro)catalytic degradation of targeted organic molecules as a proof-of-concept, and we also deduce how the nature of role of chemical states found in the PNCs surface and the purification of PbX2 precursors dictates their photocatalytic activity. Then, we demonstrate that the PEC behavior of PNCs based photomaterials can be modulated by using diverse carrier transporting layers, fabricating selective photoelectrodes to carry out oxidation/reduction reactions. Lastly, modified PNCs with promising band structure and photoluminescence quantum yield up to 100% and lead-free ones are also addressed to have high potentiality for solar-driven chemical reactions.

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