Controlled suppression of the photoluminescence superlinear dependence on excitation density in quantum dots
LNESS and Dipartimento di Scienza dei Materiali, Universitá di Milano-Bicocca, Via Cozzi 53, Milano, I-20125, Italy
Nanoscale Research Letters 2012, 7:551 doi:10.1186/1556-276X-7-551Published: 4 October 2012
We have shown that it is possible to tune, up to complete suppression, the photoluminescence superlinear dependence on the excitation density in quantum dot samples at high temperatures by annealing treatments. The effect has been attributed to the reduction of the defectivity of the material induced by annealing.