Spectator exciton effects in nanocrystals III: Unveiling the stimulated emission cross section in quantum confined CsPbBr3 nanocrystals
Apurba De,
Soumyadip Bhunia,
Yichao Cai
et al.
Abstract:Quantifying stimulated emission in semiconductor nanocrystals (NCs) remains challenging due to masking of its effects on pump-probe spectra by excited state absorption and ground state bleaching signals. Absence of this defining photo-physical parameter in turn impedes assignment of band edge electronic structure in many of these important fluorophores. Here we employ a generally applicable 3-pulse ultrafast spectroscopic method coined the “Spectator Exciton” (SX) approach to measure stimulated-emission effici… Show more
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