Hybrid organometallics are of great interest for potential applications in photovoltaics and optoelectronic devices because of their high absorption coefficient, high photoluminescence (PL) quantum yield with narrow full width at half-maximum, and their broad optically tunability. In this study, generation of blue electrogenerated chemiluminescence (ECL) from perovskite nanocrystals (PNC), CH3NH3PbCl1.08Br1.92, is demonstrated and the possible ECL generation mechanism will be discussed. Blue ECL signal can be generated at around 1.8 V and reached the maximum intensity at 2.3 V on a glassy carbon electrode while tri-n-propylamine (TPrA) used as a co-reactant in dichloromethane. The blue ECL spectrum is consistent with the PL spectrum. The blue ECL spectrum of CH3NH3PbClxBr3-x at 470 nm can be tuned to 500 nm and 532 nm by varying the chemical structure and particle sizes of PNC. Fluorescence image and dynamics of single PNC particles will also be presented in this talk.

Blue electrogenerated chemiluminescene from halide perovskite nanocrystals

255th National Meeting (2018)

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