研究目的
Investigating the component regulation and crystallization mechanism of CsPbBr3/Cs4PbBr6 perovskite composite quantum dots-embedded borosilicate glass for light emitting application.
研究成果
Highly luminescent QDs@glass with high PLQY of 58% and outstanding reliability including thermal stability, moisture resistance, photostability and water resistance stability was obtained. The white LED fabricated using the QDs@glass powder exhibits excellent luminescent performance with a wide color gamut of 130% NTSC value, indicating excellent application potentials in white LED and display.
研究不足
The technical and application constraints include the volatilization of bromide sources at high temperatures, the need for optimization of raw components and melting conditions to achieve high PLQY, and the potential for further improvement in thermal and photostability.
1：Experimental Design and Method Selection:
The precursor glasses were prepared via a melting quenching route and subsequent crystallization (heat-treatment). The effect of raw components and melting condition on the crystallization process, phase transition and crystal growth of CsPbBr3/Cs4PbBr6 QDs in the glass matrix were discussed.
2：Sample Selection and Data Sources:
The precursor glasses with compositions of 15Na2CO3-20ZnO-80H3BO3-15SiO2-10BaCO3-xCs2CO3-yPbBr2-2xNaBr were used.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), Transmission electron microscope (TEM), spectrofluorometer (FS5), integrating sphere, xenon lamp, muffle furnace, copper mold.
4：Experimental Procedures and Operational Workflow:
The raw materials were mixed, ground, pre-sintered, sintered, poured into a preheated copper mold, and heat-treated.
5：Data Analysis Methods:
XRD for crystallized phase structure, TEM for morphology, PL and PLE spectra for optical properties, PL decay curves for lifetime, PLQY for quantum yield.
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