Fig. 3: Stability characterizations.
From: Stable and efficient pure blue quantum-dot LEDs enabled by inserting an anti-oxidation layer
a The operational lifetimes (actual luminance/initial luminance (L/L0) versus time) of QD-LEDs without and with PBO. b Extrapolation of accelerating factor (n) for the lifetime estimation by fitting the Log(T50)-Log(L0) data points. The initial luminance (L0) and the measured time (T) for certain luminance degradation follow the empirical formula: L0n•T = constant. Here, n is defined as the accelerating factor, which can be obtained by fitting the values at multiple initial luminances. In our devices, the accelerating factor is about 1.78. c Statistical histograms of the lifetime of 25 devices without and with PBO. d The operational cyclability of the device with PBO operated for 12 h at a time.
