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Photoluminescence material with frequency synergistic light conversion and preparation method as well as use thereof

A photoluminescent material and photoluminescent technology, applied in luminescent materials, photovoltaic power generation, chemical instruments and methods, etc., can solve problems that restrict photovoltaic efficiency, eliminate heat loss and sub-band loss, simple composition, easy synthesis Effect

Inactive Publication Date: 2012-01-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What is more noteworthy is that solar cells can only selectively absorb sunlight in a narrower band in the middle, which seriously restricts the further improvement of their photovoltaic efficiency.

Method used

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  • Photoluminescence material with frequency synergistic light conversion and preparation method as well as use thereof
  • Photoluminescence material with frequency synergistic light conversion and preparation method as well as use thereof
  • Photoluminescence material with frequency synergistic light conversion and preparation method as well as use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Synthesis of stoichiometric equation as NaGd by high temperature solid phase method 0.80 Er 0.20 f 4 s material. Weigh 0.3252g NaF, 0.3474g ErF 3 and 1.3274 g GdF 3 Rare earth fluorides were used as raw materials, mixed evenly and ground for half an hour, and then added 2 mL of absolute ethanol to continue grinding for one hour. Put the mixture into a corundum crucible and then transfer it to a tube furnace. Take another crucible and put 0.60 g of NH 4 HF 2 , both ends of the tube furnace are closed. Calcined at 700°C for 6 hours and cooled naturally to obtain the sample. For the excitation spectrum of the prepared sample emission peak at 659nm, see figure 2 . For the luminescence spectrum of the prepared sample under the common excitation of 442nm and 1540nm, or the common excitation of 370nm and 1540nm, see image 3 .

Embodiment 2

[0043] Synthesis of stoichiometric equation as NaGd by high temperature solid phase method 0.50 Er 0.50 f 4 s material. Weigh 0.3215g NaF, 0.8584g ErF 3 and 0.8201 g GdF 3 Rare earth fluorides were used as raw materials, mixed evenly and ground for half an hour, and then added 2 mL of absolute ethanol to continue grinding for one hour. Put the mixture into a corundum crucible and then transfer it to a tube furnace. Take another crucible and put 0.60 g of NH 4 HF 2 , both ends of the tube furnace are closed. Calcined at 700°C for 6 hours and cooled naturally to obtain the sample.

Embodiment 3

[0045] Synthesis of stoichiometric equation as NaGd by high temperature solid state method 0.50 Er 0.50 f 4 s material. Weigh 0.3215g NaF, 0.8584g ErF 3 and 0.8201 g GdF 3 Rare earth fluorides were used as raw materials, mixed evenly and ground for half an hour, and then added 2 mL of absolute ethanol to continue grinding for one hour. Put the mixture into a corundum crucible and then transfer it to a tube furnace. Take another crucible and put 0.60 g of NH 4 HF 2 , both ends of the tube furnace are closed. Calcined at 1000°C for 4 hours and cooled naturally to obtain the sample.

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Abstract

The invention discloses a photoluminescence material with frequency synergistic light conversion and a preparation method thereof. The material meets AB1-x-yFzErxCy, wherein x is greater than 0 and is less than or equal to 0.5, y is greater than or equal to 0 and is less than or equal to 0.5, and z is 4; or the material meets AB2-x-yFzErxCy, wherein x is greater than 0 and is less than or equal to 0.5, y is greater than or equal to 0 and is less than or equal to 0.5, and z is 8; A is any one of metal elements Li, Na, K and Ba; B is any one of rare earth elements Y and Gd; and C is any one of rare earth elements Tm and Ho. The material is prepared by using the conventional high-temperature solid-phase method or hydrothermal synthesis method. Through the material, ultraviolet light / blue light and infrared light are effectively and simultaneously converted into red light; and the intensity of the red light is greater than two times enhanced. The material can be applied to the fields of solar cells, agricultural light conversion films and the like, is environmentally-friendly and pollution-free, and has the advantages of simple preparation process, high repeatability, low cost and easiness in large-scale industrial production.

Description

technical field [0001] The invention relates to a photoluminescent material and its preparation method and use, in particular to a photoluminescent material with frequency synergy light conversion and its preparation method and use. Background technique [0002] The development of lighting, display and photovoltaic technology makes photoluminescent materials become highly valued functional materials. However, the existing photoluminescent materials are limited to a single excitation method, such as lamp powder and agricultural light conversion film, which mostly use the down-conversion of high-frequency light to emit light, and photoluminescent materials such as three-dimensional displays and biomarkers mainly use the up-conversion of low-frequency light. mechanism for the emission of light. The current up-conversion efficiency is extremely low, even the best up-conversion material NaYF 4 :2%Er 3+ ,18%Yb 3+ The up-conversion efficiency is only 3%, which seriously restric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L31/055
CPCY02E10/50Y02E10/52
Inventor 颜晓红王祥夫施瑶瑶林涵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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