Fig. 3: Photoluminescence (PL) temperature dependence of the glass-QDs-nAg (where QDs: quantum dots, nAg: silver nanoparticles) nanocomposite.
From: Ultrafast photoluminescence and multiscale light amplification in nanoplasmonic cavity glass
a Temperature-dependent PL spectra of NBP:CdTe,nAg (NBP: sodium borophosphate glass). The intensity of the emission strongly increases at low temperatures due to lower phonon-exciton interactions. b Excitonic (X) and donor-acceptor (DA) contributions to the QD PL. c Comparison of the temperature dependence of the CdTe QD (green) and bulk (orange) peak positions, confirming the quantum dot origin of the QD emission. Linear fit: y = − 0.495*103*x + 2.599, R2 = 0.998. d Comparison of the QD and surface defect (SD) PL intensities in NBP:CdTe,nAg, and NBP:CdTe. e Full width at half maximum FWHM values of the QD peak and X contribution fitted to the CC model, indicating the weak/strong interaction between the CdTe QD excitons/DA contribution to the PL and lattice phonons.
