Fig. 5: The mechanism of carrier transport and recombination in the large-area white light-emitting diodes.
From: Nanoscale heterophase regulation enables sunlight-like full-spectrum white electroluminescence
a Demonstration of carrier transport and carrier recombination process in the control device, where Process 1 dominates the whole process. b Demonstration of carrier transport and carrier recombination process in the target large-area WLED, where Process 3 plays a crucial role. c The photograph of the control large-area WLED, showing heterogeneous multicolour EL. d The photograph of the target large-area WLED, showing uniform and pure white EL. e Normalised EL spectra of the control device as applied bias increasing from 3.6 V to 6.6 V. f Normalised EL spectra of the target WLED as applied bias increasing. g–i The normalised spectrum of three commercial WLEDs, where blue light acts as the excitation source. j The normalised EL spectrum of WLED with low blue-light component. k Comparison of match index of representative commercial WLEDs and this work.
