ZnCuInS/ZnSe/ZnS Quantum Dot-Based Downconversion Light-Emitting Diodes and Their Thermal Effect

Figure 4

The peak position and FWHM of PL spectra of QD film excited by LED with different working bias (a); the images of GaN LED (b) and the thermal distribution of GaN LED at operating voltages of 2.5 and 3.2 V (c and d); the temperature of GaN chip at different voltages (e); temperature-dependent PL spectra (f) of green QDs in the range from 20 to 100°C (inset: the fitting curve according to (2)).

(a)

(b)

(c)

(d)

(e)

(f)