Abstract
In this paper, we report a simple one-pot strategy to synthesize highly stable SiO 2-coated orange-yellow CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots with strong orange-yellow photoluminescence. The microstructure characterization indicates that the CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots were effectively encapsulated by the SiO 2. The SiO 2-coated CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots show higher humidity stability and thermal stability than the CsPb 0.7Mn 0.3Br 0.75Cl 2.25 quantum dots without SiO 2 coating. The white light-emitting diodes (WLEDs) were obtained by coating orange-yellow CsPb 0.7Mn 0.3Br 0.75Cl 2.25@SiO 2 and blue CsPbBrCl 2@SiO 2 quantum dots on the ultraviolet gallium nitride light-emitting diode chip. The as-prepared white light-emitting diodes show bright white light emission with a color coordinate of (0.3347, 0.2825), color rendering index of 82 and correlated color temperature of 5329 K. The results provide a simple method to fabricate stable orange-yellow luminescent material for white light-emitting diodes.
Original language | English |
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Article number | 117236 |
Journal | Journal of Luminescence |
Volume | 223 |
Early online date | 24 Mar 2020 |
DOIs | |
Publication status | Published - Jul 2020 |
Keywords
- Inorganic perovskite
- Quantum dots
- White light-emitting diodes
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- General Chemistry
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics