The role of mid-gap states in all-inorganic CsPbBr 3 nanoparticle one photon up-conversion
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CsPbBr3 nanoparticles that have been treated with NH4SCN to produce essentially trap-free surfaces show an increase of one photon up-conversion quantum yield with little change to the up-conversion energy of activation, as estimated using an Arrhenius analysis. This suggests that mid-gap trap states constitute a loss pathway, and may not be integral to the one-photon excitation mechanism.
author list (cited authors)
Roman, B. J., & Sheldon, M.