2024
DOI: 10.1021/jacs.4c05412
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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. The absence of this defining photophysical 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 eff… Show more

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