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Dual-function glass-ceramic materials and bifacial solar cells using them

A technology of solar cells and glass ceramics, which is applied in the field of solar cells and can solve problems such as enhancing the power generation efficiency of solar cells

Active Publication Date: 2019-09-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a problem arises in this way. Originally, there is only sunlight that illuminates one light transmission direction of the solar cell, but the infrared light converted by the quantum tailoring layer deviates from and illuminates the two light transmission directions of the solar cell. Therefore, the utilization rate of infrared quantum tailoring luminous energy is only 50%, which is the main reason why near-infrared quantum tailoring has not achieved significant enhancement to improve the power generation efficiency of solar cells so far.

Method used

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  • Dual-function glass-ceramic materials and bifacial solar cells using them
  • Dual-function glass-ceramic materials and bifacial solar cells using them
  • Dual-function glass-ceramic materials and bifacial solar cells using them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 - oxyfluoride nanophase glass ceramics containing erbium ytterbium ion pairs

[0050] The samples used in the experiments were (A) Er(1%)Yb(8.0%):FOV, (B)Er(0.5%)Yb(3.0%):FOV and (C)Er(0.5%):FOV. Oxyfluoride Nanophase Glass Ceramics Made of Silica SiO 2 , Zinc fluoride ZnF 2 , lead fluoride PbF 2 , Lutetium fluoride LuF 3 , Erbium fluoride ErF 3 , and Ytterbium Fluoride YbF 3 production. (B) Er(0.5%)Yb(3.0%): The composition of the FOV sample is SiO 2 (45%), PbF 2 (30%), ZnF 2 (17.2%), LuF 3 (4.3%), ErF 3 (0.5%), and YbF 3 (3%).

[0051] The specific preparation steps are as follows: The oxyfluoride glass sample is made of high-purity silicon oxide SiO 2 , Zinc fluoride ZnF 2 , lead fluoride PbF 2 , Lutetium fluoride LuF 3 , Erbium fluoride ErF 3 , and Ytterbium Fluoride YbF 3 After the powder is prepared, the fully mixed raw materials are placed in an alumina crucible, and melted in an oxygen atmosphere at 900 ° C for 100 minutes. The introd...

Embodiment 2

[0062] Example 2-Cooperative down-conversion luminescence of oxyfluoride nanophase glass ceramics Tb(0.7)Yb(5):FOV

[0063] The sample used in the experiment was Tb(0.7)Yb(5.0):FOV. The oxyfluoride nanophase glass ceramic is composed of silicon oxide SiO 2 , Zinc fluoride ZnF 2 , lead fluoride PbF 2 , Lutetium fluoride LuF 3 , terbium fluoride TbF 3 , and Ytterbium Fluoride YbF 3 production. The composition of the Tb(0.7)Yb(5.0):FOV sample is SiO 2 (45%), PbF 2 (30%), ZnF 2(17.1%), LuF 3 (2.2%), TbF 3 (0.7%) and YbF 3 (5%).

[0064] The specific preparation steps are as follows: The oxyfluoride glass sample is made of high-purity silicon oxide SiO 2 , Zinc fluoride ZnF 2 , lead fluoride PbF 2 , Lutetium fluoride LuF 3 , terbium fluoride TbF 3 , and Ytterbium Fluoride YbF 3 After the powder is prepared, the fully mixed raw materials are placed in an alumina crucible, and melted in an oxygen atmosphere at 900 ° C for 100 minutes. The introduction of dry oxygen ...

Embodiment 3

[0080] Example 3 - Bifacial Solar Cell

[0081] like Figure 11 The double-sided solar cell of this embodiment is constructed as shown, wherein the solar cell 1 is a standard crystalline silicon solar cell or a multi-junction cascaded GaInP / GaAs / Ge (or InGaP / InGaAs / Ge) solar cell, illuminated from above sunlight can make it generate electricity. Below the solar cell 1 is a near-infrared quantum tailoring and up-conversion conversion layer 2, which is a six-sided polished glass-ceramic sample, such as the Er(1%)Yb(8%):FOV of Example 1, with a size of about It is 50*50*5mm, and the thickness is about 5mm. The conversion layer 2 has two highly light-transmitting surfaces on the side close to the side that guides sunlight laterally and the side of the solar cell, and the other surfaces are coated with a highly reflective layer 3 of aluminum film.

[0082] Shown on the left side of the figure is a side guide device, including a mirror or a reflective layer 4 and a lens, ie, a Fr...

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Abstract

The invention provides a double-function glass ceramic material and a double-surface solar cell using same. The double-function glass ceramic material has functions of quantum tailoring and wavelength conversion and furthermore has a scattering function to visible-near-infrared light. The glass ceramic material is arranged at the back surface of the solar cell, and sunlight which is incident from a side surface can be scattered to multi-direction uniformly irradiated sunlight, thereby realizing irradiation to the bottom surface (back surface) of the solar cell. The solar cell can realize double-surface power generation, thereby greatly improving power generation efficiency of the solar cell.

Description

technical field [0001] The present invention relates to the technical field of solar cells, in particular to quantum tailored functional materials for solar cells and solar cells using the same. Background technique [0002] The research and development and utilization of new solar energy is a major hot research topic at home and abroad. Solar energy is abundant, but due to the high photoelectric conversion cost and low efficiency of solar cells, there is a huge difference between the solar energy that has been developed and utilized and the actual reserves. A major problem faced by solar cell photovoltaic devices is that energy conversion needs to span the ultraviolet, visible and near-infrared solar spectral regions, and solar cells need to have high conversion efficiency in the entire spectral region. for E g = 1.12eV crystalline silicon single-junction solar cell, it only has better response sensitivity in the range of energy slightly greater than 1.12eV, that is, wave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/055H01L31/18H02S40/22
CPCH01L31/0547H01L31/055H01L31/1864H02S40/22Y02E10/52Y02P70/50
Inventor 陈晓波李崧杨国建
Owner BEIJING NORMAL UNIVERSITY
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