Fig. 3

a Contour of temperature-tuned PL spectra of the uncalibrated sample from 6.0 to 45.0 K. The second-order correlation function g⁽²⁾(τ) of the QD exciton (X) line under CW excitation of the sample without the calibration process (b) and the calibrated sample (c). d The radiative lifetime and g⁽²⁾(0) of the exciton emission for the calibrated sample under different excitation power