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a cspb 1-x ti x i 3 Red-light glass-ceramic and preparation method thereof

A technology of glass-ceramics and red light, which is applied in the field of CsPb1-xTixI3 red-light glass-ceramics and its preparation, can solve the problems of lead hindering commercialization, lack of red light emission wavelength, uneven distribution of quantum dots, etc., and achieve good optics Performance and stability, process is simple and easy to operate, and the effect of improving quantum efficiency

Active Publication Date: 2022-04-01
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) From its figure 2 (a) The photo of the quantum dot glass sample provided shows that the distribution of quantum dots in the glass is very uneven;
[0005] (2) All-inorganic CsPbX 3 The toxicity of lead in perovskite quantum dot materials hinders the commercialization of this technology;
[0006] (3) The quantum efficiency of the quantum dot glass is low, only 4.2%
However, rare earth elements are expensive and scarce, and the development of stable and efficient red phosphors lags far behind green and yellow
Moreover, due to the lack of red emission wavelengths in the emission spectrum, the CRI value of WLEDs composed of green and yellow phosphors is low, which is inconvenient for human eyes to recognize the original color of objects

Method used

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  • a cspb <sub>1-x</sub> ti <sub>x</sub> i <sub>3</sub> Red-light glass-ceramic and preparation method thereof
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  • a cspb <sub>1-x</sub> ti <sub>x</sub> i <sub>3</sub> Red-light glass-ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0051] Accurately weigh B according to the glass formula in Table 1 2 o 3 , SiO 2 , ZnO, K 2 O, Na 2 O, Cs 2 CO 3 , PbI 2 、TiO 2 , NaI to mix and grind evenly, put it into a corundum crucible and place it in a high-temperature furnace, raise the temperature to 1200°C, keep it warm for 10 minutes, pour it into a mold with a pre-set temperature, and anneal it in a muffle furnace with a holding temperature of 400°C. Insulate for 3h, then heat-treat in a muffle furnace at 500°C, hold for 10h, and heat-treat to obtain CsPb 1-x Ti x I 3 Red light glass-ceramic samples.

[0052] Table 1: Glass formulations and fluorescence wavelengths

[0053]

[0054]

[0055] The percentages in Table 1 are all mass percentages.

Embodiment 9

[0057] Referring to Example 1-8, according to 25% B 2 o 3 -25% SiO2 2 -15%ZnO-35% quantum dots (Cs 2 CO 3 , PbI 2 、TiO 2 , NaI, x=0.3) glass formula Weigh the raw materials, mix and grind them evenly, put them into a corundum crucible, place them in a muffle furnace, raise the temperature to 1200°C, keep it warm for 10min, pour it into a mold with a pre-set temperature, and Annealed in a muffle furnace at 400°C for 3 hours, then heat treated at 560°C for 10 hours, the obtained CsPb 1-x Ti x I 3 Red-light glass-ceramic samples, increasing the heat treatment temperature can make CsPb 1-x Ti x I 3 The emission wavelength of the red-light glass-ceramics is red-shifted, and the measured emission wavelength is 704nm.

Embodiment 10

[0059] Referring to Example 1-8, according to 25% B 2 o 3 -25% SiO2 2 -15%ZnO-5%K 2 O-30% quantum dots (Cs 2 CO 3 , PbI 2 、TiO 2 , NaI, x=0.3) Weigh the raw materials, mix and grind them evenly, put them into a corundum crucible, place them in a muffle furnace, raise the temperature to 1400°C, keep it warm for 10 minutes, pour it into a mold with a pre-set temperature, and Annealed in a muffle furnace at 400°C for 3h, then heat treated at 500°C for 10h, the obtained CsPb 1-x Ti x I 3 For the red-light glass-ceramic sample, the measured emission wavelength is 680nm. After the melting temperature is increased, the fluidity of the glass liquid is better, and the uniformity of the obtained red-light glass sample is better.

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Abstract

The invention discloses a CsPb 1‑x Ti x I 3 Red-light glass-ceramic and its preparation method. The CsPb 1‑x Ti x I 3 Red light glass-ceramic adopts B 2 o 3 ‑SiO2 2 ‑ZnO‑Na 2 O‑K 2 O-based glass system, CsPb 1‑x Ti x I 3 Quantum dots are uniformly distributed in B 2 o 3 ‑SiO2 2 ‑ZnO‑Na 2 O‑K 2 In the O-based glass system; the CsPb 1‑x Ti x I 3 In the red light glass-ceramics, the mass percentage content of each component is: B 2 o 3 :20‑40%, SiO 2 :20‑60%, ZnO: 10‑20%, Na 2 O: 0‑10%, K 2 O: 0‑10%, CsPb 1‑x Ti x I 3 Quantum dots: 5‑40%; the CsPb 1‑x Ti x I 3 In the quantum dots, the value of x is >0 and ≤0.7. The invention is prepared by melting method, which specifically includes mixing, melting and heat treatment of each component raw material. CsPb of the present invention 1‑x Ti x I 3 The red light glass-ceramic emits red light with adjustable wavelength, has good optical performance and stability, high quantum efficiency and environmental protection advantages, and is easy to prepare, and can be used to prepare white light LEDs.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and the invention relates to a CsPb 1-x Ti x I 3 Red-light glass-ceramic and its preparation method. Background technique [0002] In recent years, perovskite quantum dot materials have important applications in display, backlight, solid-state lighting and other fields due to their excellent characteristics such as narrow emission band, high quantum yield, and adjustable luminous color, and are multi-purpose. A new generation of optoelectronic materials. [0003] However, one of the main issues hindering the application of perovskite quantum dot materials is their long-term stability, especially moisture resistance, which has not been well resolved so far. Generally, perovskite QD materials exhibit strong ionicity and high surface energy, and will rapidly degrade into their components when in direct contact with polar solvents such as water. Glass has the characteristics of high transmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C4/12
Inventor 张泽龙向卫东梁晓娟
Owner WENZHOU UNIV