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The design of dual‐mode fluorescence and Raman tags stimulates a growing interest in biomedical imaging and sensing applications as they offer the possibility to synergistically combine the versatility and velocity of fluorescence imaging with the specificity of Raman spectroscopy. Although lanthanide‐doped fluoride nanoparticles (NPs) are among the most studied fluorescent nanoprobes, their use for...
The electroluminescence performance and long‐term stability of perovskite light‐emitting diodes (PeLEDs) are greatly affected by the film quality of perovskite emitting layer. Herein, the authors employ an ionic liquid, 1‐butyl‐3‐methylimidazolium trifluoromethanesulfonate ([BMIm]OTf), to manipulate the growth of quasi‐2D perovskite films by providing heterogeneous nucleation sites. The [BMIm]OTf...
Color‐saturated red light‐emitting diodes (LEDs) with emission wavelengths at around 620–640 nm are an essential part of high‐definition displays. Metal halide perovskites with very narrow emission linewidth are promising emitters, and rapid progress has been made in perovskite‐based LEDs (PeLEDs); however, the efficiency of the current color—pure red PeLEDs—still far lags behind those of other‐colored...
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