Achieving a near-unity quantum yield from yellow emitting metal halide double perovskites toward human-centric warm white LED lighting

Abstract

The use of LED lighting resulted in prolonged exposure to blue radiation, which is harm for human eye-health. Herein, a new strategy striving for “human-centric” lighting is demonstrated by doping...

Embedding Te4+ into Sn4+-Based Metal Halide To Passivate Structure Defects for High-Performance Light-Emitting Application

“…Moreover, the corresponding luminescence efficiency reaches 32.34 lm W 1– at 2.7 V and 20 mA driving current, which is higher than that of many reported broadband-phosphor-based WLEDs (Table S6). ,,− In addition, the fabricated WLED has similar spectral profiles at different driving currents (20–320 mA), suggesting better electroluminescence stability (Figure d). In summary, the results show that the novel orange-emitting phosphor (C 4 H 7 N 2 ) 2 SnCl 6 :1%Te is a potential candidate for solid-state lighting applications.…”

Various approaches to synthesize water-stable halide PeNCs

“…Solution-processed halide PeNCs have already set benchmarks in the research on optical devices [1][2][3][4] and optoelectronic devices, [5][6][7] especially solar cells [8][9][10][11] (making them competitors to Si-based solar cells in terms of efficiency) and solid-state lightemitting diodes (providing outstanding colour purity and high luminescence efficiency). [12][13][14][15][16][17] Despite the relatively short period of research, perovskite nanocrystals (PeNCs) achieved almost ∼30% power conversion efficiency (PCE), 10 near-unity photoluminescence quantum yield (PLQY), 14,18 large carrier lifetime ($1 ms), 19 and long carrier diffusion length (in the range of mm). 20 However, instability in the presence of water impedes large-scale commercialization or daily use of products.…”