Highly efficient and tunable dual-band photoluminescence from CsBr: Mn2+ nanocrystals embedded in glasses

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179434 - 179434

Published: Feb. 1, 2025

Language: Английский

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Blue-Emitting CsPbBr₃ Nanocrystals: Synthesis Progress and Bright Photoluminescence

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

All-inorganic perovskite (CsPbX3, X = Cl, Br, I) nanomaterials as novel optoelectronic semiconductors have attracted much attention due to their unique photoelectric properties in lighting, display, and photovoltaic applications. Meanwhile, green red light-emitting diodes (LEDs) based on bromine iodine groups developed rapidly, which the high external quantum efficiency (EQE) is close that of current commercial LEDs. However, EQE perovskite-based blue LEDs far behind. Blue are often made by CsPbCl3 CsPb(Cl/Br)3 nanocrystals (NCs) with low photoluminescence (PL) yields. Their phase segregation seriously limits practical The PL peak CsPbBr3 NCs usually located region. In case a strong confinement effect, can be observed from NCs. Therefore, emitting become hot topic. This review focused synthesis, ligand selection, morphology control NCs, microstructure, luminescence, synthesis method were first discussed. addition, influence capping ligands stability indicated. Furthermore, size adjustment also Finally, application existing problems blue-emitting summarized. aims provide new insights into preparation efficient stable design-based manufacturing

Language: Английский

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Realization of high efficiency pure red CsPbI3 quantum dot light emitting diodes by polarity screening

Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121161 - 121161

Published: Feb. 1, 2025

Language: Английский

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Role of Pseudohalide for Enhancements of Emission Efficiency and Stability of Lead‐Free Blue‐Emitting Cs₃Cu₂I₅ Nanocrystals

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Abstract Cs 3 Cu 2 I 5 has been considered a promising lead‐free perovskite material for blue light emission due to its environmental friendliness and unique optical properties. Although nanocrystals (NCs) exhibit excellent structural stability, their high specific surface area at the nanoscale inevitably leads formation of point defects caused by vacancies during self‐assembling process. In this study, structure using pseudohalide thiocyanate (SCN⁻) is modified, which an effective ionic radius similar I⁻. The strong binding energy between + ions lone electron pairs S N atoms in linear SCN⁻ enhance crystallinity NCs. addition, improve size uniformity adjusting chemical potential solvent system. incorporation also modified electronic changing bandgap improving photoluminescence quantum yield from 62.5% 76.7%. Finally, fluorescent light‐emitting diode demonstrated utilizing emission, white emitting (white‐LED) are produced combining with yellow‐emitting layer CsCu , exhibiting good operational stability.

Language: Английский

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Synergistic Effect of Ligands and Halogen Vacancies for Pure-Red CsPbI₃ Superlattice Light-Emitting Diodes

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2341 - 2348

Published: April 16, 2025

Language: Английский

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