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Application of single rare earth infrared first-order quantum tailoring in solar cells

A solar cell, quantum tailoring technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of high cost and low efficiency of solar energy, and achieve the effect of high quantum tailoring efficiency

Inactive Publication Date: 2016-12-14
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main barriers currently limiting the use of solar energy as a general power source are high cost and low efficiency

Method used

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  • Application of single rare earth infrared first-order quantum tailoring in solar cells
  • Application of single rare earth infrared first-order quantum tailoring in solar cells
  • Application of single rare earth infrared first-order quantum tailoring in solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Er 0.3 Gd 0.7 VO 4 Infrared Quantum Tailoring Effect of Crystal Materials

[0029] First, prepare a high concentration of Er 0.3 Gd 0.7 VO 4 crystal material. With a purity of 99.99% V 2 o 5 , Gd 2 o 3 and Nd 2 o 3 Chemical reagents are used as starting materials. Weigh according to the stoichiometric ratio, mix evenly, and burn at 850°C for 7 hours to obtain Nd:GdVO 4 polycrystalline material.

[0030] Nd:GdVO4 crystal growth adopts medium frequency induction heating method, the growth vessel is iridium crucible, filled with N 2 As a protective atmosphere (adding an appropriate amount of O 2 ), the crystal growth direction is a or c, and the process parameters of crystal growth are related to the diameter of the crystal and the crucible. Usually, the pulling speed is 1-2mm / h when the crystal grows with equal diameter.

[0031] Measure Er 0.3 Gd 0.7 VO 4Excitation and fluorescence spectra of crystalline materials. figure 2 Shows Er 0.3 Gd...

Embodiment 2

[0042] Embodiment 2.Er 0.1 Gd 0.9 VO 4 Infrared Quantum Tailoring Effect of Crystal Materials

[0043] Similar to Example 1, Er was prepared and measured 0.1 Gd 0.9 VO 4 The emission spectrum and excitation spectrum of the material, and its peak position and Er 0.3 Gd 0.7 VO 4 The crystalline materials are roughly the same, but their spectral peak intensities vary considerably.

[0044] First, the measured Er 0.1 Gd 0.9 VO 4 The excitation spectrum of the material, 4 I 13 / 2 → 4 I 15 / 2 The excitation spectrum of the fluorescence transition has several excitation peaks at 368.0, 382.0, 408.7, 453.8, 490.7, 525.0, (546.7, 552.8), 655.8, and 805.0 nm, corresponding to 4 G 9 / 2 , 4 G 11 / 2 , ( 2 G, 4 F, 2 h) 9 / 2 , 4 f 5 / 2 , 4 f 7 / 2 , 2 h 11 / 2 , 4 S 3 / 2 , 4 f 9 / 2 ,and 4 I 9 / 2 Energy level absorption. measurement discovery 4 I 11 / 2 → 4 I 15 / 2 , 4 S 3 / 2 → 4 I 15 / 2 , 4 f 9 / 2 → 4 I 15 / 2 ,and 4 I 9 / 2 → 4 I 15 / 2 The wavelength position of t...

Embodiment 3

[0048] Embodiment 3. Infrared quantum tailoring effect of nanophase oxyfluoride glass ceramics [Er(3):FOV] doped with erbium

[0049] Made of silicon oxide (SiO 2 ), zinc fluoride (ZnF 2 ), lead fluoride (PbF 2 ), lutetium fluoride (LuF 3 ) and Erbium Fluoride (ErF 3 ) to prepare Er(3):FOV:SiO with the following composition 2 (45%), ZnF 2 (17.1%), PbF 2 (30%), LuF 3 (4.9%) and ErF 3 (3%).

[0050] Measurement of Er(3): Er in FOV 3+ The energy level structure of , see the results Figure 5 . From Figure 5 Visible, for 802.5nm light excitation 4 I 9 / 2 When the energy level (PE 03 ), 4 I 9 / 2 The number of particles in the energy level can be determined by spontaneous emission, non-radiative multiphonon relaxation and { 4 I 9 / 2 → 4 I 13 / 2 , 4 I 15 / 2 → 4 I 13 / 2}ET r31 -ET a01 Cross energy transfer channel transfers the particle population to the first excited state 4 I 13 / 2 energy level. From calculations of the rates of various processes, 4 I 9 / 2 → ...

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Abstract

The invention relates to an application of a single rare earth infrared first-order quantum cutting in a solar cell. The single rare earth is an Er <3+> ion or a Tm <3+> ion which exists in a quantum cutting layer on a light incident surface of the solar cell; and infrared quantum cutting of a three-photon or four-photon excited by light ultraviolet and visible light is realized.

Description

technical field [0001] The present invention relates to the application of single rare earth infrared quantum tailoring in solar cells, specifically, the present invention relates to Er 3+ Ion and Tm 3+ Application of ionic first-order quantum tailoring in solar cells. Background technique [0002] The energy issue has become one of the issues of common concern to mankind. As an ideal green energy, solar energy is a new energy that is urgently needed by the country, efficient, environmentally friendly, cheap and inexhaustible. The effective use of solar energy is mainly the photovoltaic utilization of solar energy. A solar cell is a device that realizes photoelectric conversion, which uses the photoelectric effect to convert the sun's light energy into electrical energy. However, the main barriers currently limiting the use of solar energy as a general power source are high cost and low efficiency. [0003] Quantum clipping is a phenomenon in which, taking two-photon qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/055
CPCY02E10/52
Inventor 陈晓波宋增福
Owner BEIJING NORMAL UNIVERSITY
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