Mapping the effect of geometry on the radiative rate in core/shell QDs: core size dictates the conduction band offset.

3a–c ) demonstrates a clear trend in that radiative lifetime increases with increasing shell thickness, as has previously been observed. 27,30–35 The TRPL data is used to extract excited state lifetimes, τ , and excited state recombination rates, τ −1 ( Fig. 3d–f ).

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