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Near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and preparation method thereof

A silicon solar cell, quantum tailoring technology, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve problems such as poor mixing effect, narrow spectral range, and low conversion efficiency, so as to broaden the spectral absorption range and improve conversion Efficiency, the effect that the conversion efficiency is high

Active Publication Date: 2013-10-02
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the XRD pattern of the phosphor, it can be seen that the excitation spectrum of the phosphor is in the range of 230-290nm, while the wavelength of UVA with the largest number in the solar ultraviolet spectrum is at 320-400nm, and the wavelength of UVB with a small number is at 280-290nm. 320nm, so that the phosphor can only use a small number of UVB (and not all) in the solar ultraviolet spectrum to convert, the spectral range is narrow, and there are few resources that can be used by it, and the phosphor must convert short-wavelength UVB (ultraviolet Photons) are converted into infrared photons with longer wavelengths. The middle wavelength span is large, and the middle loss is bound to be high, resulting in low conversion efficiency.
Therefore, the phosphor is not suitable for use on solar cells
In addition, the sources of cerium and ytterbium are cerium oxide and ytterbium oxide, which are solid powders, so the mixing effect is not good, the doping effect is not good, and the performance of the obtained phosphor is not good.

Method used

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  • Near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and preparation method thereof
  • Near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and preparation method thereof
  • Near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and preparation method thereof

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Effect test

Embodiment 1

[0032] According to the chemical composition of the present invention LaBO 3 : Ce 3+ (1%), Yb 3+ (x%), respectively weigh La 2 o 3 (Analytical pure) 1.58g, HBO 3 (Analytical pure) 0.8g; Measure 100ul of 1mol / L Ce(NO 3 ) 3 solution and 200ul of 1mol / L Yb(NO 3 ) 3 solution; the La 2 o 3 、HBO 3 , Ce(NO 3 ) 3 solution and Yb(NO 3 ) 3 The solution is mixed evenly to obtain a mixture; then the mixture is dried in an oven at 80°C for 30 minutes; then the dried mixture is fully ground for 30 minutes, and the fineness of solid particles is ≤10 μm; the ground mixture is placed in a corundum crucible and placed in a high temperature box Calcined at 500°C, 900°C, and 1100°C in a type furnace for 2 hours respectively, and cooled to room temperature; the calcined sample was ground again for 10 minutes until the fineness of solid particles was ≤10 μm to obtain LaBO 3 : Ce 3+ (1%), Yb 3+ (2%) sample. Finally, the sample was tested by fluorescence spectroscopy. Figure 4 I...

Embodiment 2

[0034] According to the chemical composition of the present invention LaBO 3 : Ce 3+ (1%), Yb 3+ (x%), respectively weigh La 2 o 3 (Analytical pure) 1.56g, HBO 3 (Analytical pure) 0.8g; Measure 100ul of 1mol / L Ce(NO 3 ) 3 solution and 250ul of 1mol / L Yb(NO 3 ) 3 solution; the La 2 o 3 、HBO 3 , Ce(NO 3 ) 3 solution and Yb(NO 3 ) 3 Mix the solution evenly to obtain a mixture; put the mixture in an oven at 70°C and dry for 50 minutes; then fully grind the dried mixture for 20 minutes, and the fineness of solid particles is ≤10 μm; place the ground mixture in a corundum crucible, and put it in a high-temperature box Calcined in the furnace at 500°C, 900°C, and 1100°C for 2 hours respectively, and cooled to room temperature; the calcined sample was ground again for 20 minutes to obtain LaBO 3 : Ce 3+ (1%), Yb 3+ (2.5%) sample. Finally, the sample is tested for fluorescence spectrum, and the sample is also observed in the infrared region Yb under excitation at 33...

Embodiment 3

[0036] According to the chemical composition of the present invention LaBO 3 : Ce 3+ (1%), Yb 3+ (x%), respectively weigh La 2 o 3 (Analytical pure) 1.56g, HBO 3 (Analytical pure) 0.8g; Measure 100ul of 1mol / L Ce(NO 3 ) 3 solution and 300ul of 1mol / L Yb(NO 3 ) 3 solution; the La 2 o 3 、HBO 3 , Ce(NO 3 ) 3 solution and Yb(NO 3 ) 3 Mix the solution evenly to obtain a mixture; put the mixture in an oven at 70°C and dry for 30 minutes; then grind the dried mixture for 30 minutes, and the fineness of solid particles is ≤10 μm; place the ground mixture in a corundum crucible and put it in a high-temperature box Calcined in the furnace at 500°C, 900°C, and 1100°C for 2 hours respectively, and cooled to room temperature; the calcined sample was ground again for 10 minutes, and the solid particle fineness was ≤10 μm to obtain LaBO 3 : Ce 3+ (1%), Yb 3+ (3%) sample. Finally, the sample was tested by fluorescence spectroscopy. Figure 4 It can be seen that Ce 3+ The...

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Abstract

The invention relates to the technical field of fluorescent powder production, and discloses a near-infrared quantum cutting fluorescent powder capable of increasing silicon solar cell efficiency and a preparation method thereof. The near-infrared quantum cutting fluorescent powder has a chemical formula as follows: LaBO3:Ce<3+>(1%),Yb<3+>(x%), wherein the x is not less than 2 and not more than 3. According to the near-infrared quantum cutting fluorescent powder, when each ultraviolet photon is absorbed, a Ce<3+>-Yb<3+> ion pair can emit two near-infrared photons through cooperation energy transmission, thus emitting 980 nm near infrared light. The near-infrared quantum cutting fluorescent powder is advantageous in that silicon solar cell spectrum absorption scope can be widened, and therefore the silicon solar cell conversion efficiency can be increased.

Description

technical field [0001] The invention relates to the technical field of phosphor production, in particular to a near-infrared quantum tailoring phosphor capable of improving the efficiency of silicon solar cells and a preparation method thereof. Background technique [0002] When the air quality is AM 1.5, the solar power received by the ground is 1000 W / m 2 Under the conditions of , the spectral distribution of sunlight on the earth's land surface extends from 0.3 μm in the ultraviolet to 2.5 μm in the infrared. Since the band gap of silicon is 1.1 eV (λ=1100 nm), generally speaking, the wavelength of light that responds well to silicon solar cells should be around 1.1 eV. Most of the ultraviolet photons above the forbidden band width are converted into lattice vibrations of silicon and emitted in the form of heat energy, while photons below the forbidden band width cannot be absorbed by semiconductor silicon to generate electron-hole pairs, so it is currently possible to ...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L31/0232
CPCY02E10/52
Inventor 陈金灯李虎明吕绍杰韩健鹏
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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