High intensity photodegradation of lead halide perovskite nanocrystals

Authors: Shaw, P.J., Mercier, T.M., Bailey, C.G., Kanaras, A.G., Lagoudakis, P.G. and Charlton, M.D.B.

Journal: Proceedings of SPIE the International Society for Optical Engineering

Volume: 11302

eISSN: 1996-756X

ISSN: 0277-786X

DOI: 10.1117/12.2544170

Abstract:

In this work, we probe the photodegradative behaviour of CsPbBr3 perovskite nanocrystals under illumination intensities in excess of 1 W=cm². In doing so, we uncover optical behaviours unique to this extreme form of degradation namely a pronounced period of increasing photoluminescent intensity at the outset of degradation along with a red-shifted emission lobe. We also compare the photochemical lifetimes of CsPbBr3 to the relating organic-inorganic hybrid of FAPbBr3 and show that FAPbBr3 can withstand such high intensities for approximately ten times longer than CsPbBr3. This marks out FAPbBr3 as a potential successor to CsPbBr3 in optoelectronic applications.

Source: Scopus