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Preparation method and application of single-section solar light collector based on white light carbon dots

A technology of solar concentrators and carbon dots, applied in chemical instruments and methods, luminescent materials, photovoltaic power generation, etc.

Pending Publication Date: 2022-04-29
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still a challenge to develop single-section solar concentrators with full-color / white PL emission range, high PLQY, and high transmittance compared with multi-section solar concentrators.

Method used

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  • Preparation method and application of single-section solar light collector based on white light carbon dots
  • Preparation method and application of single-section solar light collector based on white light carbon dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation of white light carbon dots comprises the following steps:

[0016] (1) The preparation steps of the single-section light collector based on white light carbon dots are: weigh catechol with a mass ratio of 5:1 to 1:5, dissolve it in ethanol, and obtain a uniform mixed solution by ultrasonication for a certain period of time; Pour the mixed solution into a 50mL reactor and react at 150-200°C for 6-10h; then centrifuge the resulting carbon dot stock solution for 8min to separate and remove large particles of impurities, and finally store the synthesized carbon dot stock solution in a refrigerator at 4°C spare.

[0017] (2) The prepared carbon dots have a high fluorescence quantum yield of 57%.

Embodiment 2

[0019] The preparation of a single-section solar concentrator with a carbon dot concentration of 0.8wt% comprises the following steps:

[0020] (1) embedding an appropriate amount of carbon dots in a polymer (polyvinylpyrrolidone, polymethylmethacrylate) matrix to form a colloidal solution with a concentration of 0.8wt%;

[0021] (2) Spin-coat at a low speed of 500-1500rpm / s for 10-20s to spread the carbon dots / polymer solution evenly on the high-transmission glass bottom, and set the high-speed condition to 2000-3000rpm / s for 20- 30s to obtain a single-section solar concentrator with uniformity and high transmittance;

[0022] (3) Couple the edge of the solar concentrator to a commercial monocrystalline silicon cell, and test and calculate various photovoltaic values ​​under simulated sunlight irradiation; Jcs, Voc, FF, PCE, η opt , C (concentration factor) are: 12.62mA / cm 2 , 0.49V, 68.9%, 4.26%, 5.36%, 0.34.

Embodiment 3

[0024] The preparation of a single-section solar concentrator with a carbon dot concentration of 1.0wt% comprises the following steps:

[0025] (1) Embedding an appropriate amount of carbon dots into a polymer (polyvinylpyrrolidone, polymethylmethacrylate) matrix to form a colloidal solution with a concentration of 1.0wt%;

[0026] (2) Spin-coat at a low speed of 500-1500rpm / s for 10-20s to spread the carbon dots / polymer solution evenly on the high-transmission glass bottom, and set the high-speed condition to 2000-3000rpm / s for 20- 30s to obtain a single-section solar concentrator with uniformity and high transmittance;

[0027] (3) Couple the edge of the solar concentrator to a commercial monocrystalline silicon cell, and test and calculate various photovoltaic values ​​under simulated sunlight irradiation; Jcs, Voc, FF, PCE, η opt , C (concentration factor) are: 13.88mA / cm 2 , 0.49V, 66.2%, 4.5%, 5.89%, 0.37.

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Abstract

The invention provides a preparation method and application of a single-section solar light collector based on white light carbon dots, and the method comprises the following steps: (1) synthesizing white light emitting carbon dots through a solvothermal method, and placing the white light emitting carbon dots in a refrigerator for refrigeration for later use after centrifugal purification; (2) embedding the carbon dots into a polymer matrix under the conditions of proper rotating speed and time, and spin-coating the polymer matrix on a glass substrate with the size of 2.5 * 2.5 * 0.1 cm < 3 > to obtain a single-section solar light collector; and (3) coupling a commercial battery at the edge of the solar light collector, testing and calculating each performance of the commercial battery. The stable white-light carbon-dot-based single-section solar light collector is prepared, high stability and optical adjustability of a carbon-based fluorescent material are effectively utilized, so that the photoelectric conversion efficiency of a solar cell is improved, and the white-light carbon-dot-based single-section solar light collector can be applied to the fields of photovoltaic buildings such as photovoltaic windows and photovoltaic roofs.

Description

technical field [0001] The invention relates to a preparation method of a single-segment solar concentrator based on white light carbon dots, in particular to the application of this photovoltaic device in the fields of photovoltaic integrated buildings such as photovoltaic glass and photovoltaic roof. Background technique [0002] The development of the times promotes the progress of science and technology. Thanks to this, modern chemistry, chemical engineering and material science are also developing rapidly. The consumption of energy has also gradually increased, and the use of fossil energy is more common at present. However, the excessive use of fossil fuels has caused excessive emissions of carbon dioxide, which in turn causes the greenhouse effect, causing global warming and sea level rise. In order to alleviate this crisis, the development and utilization of clean and renewable energy has become particularly important. In recent years, the use of solar radiation to...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/65H01L31/055
CPCC09K11/65C09K11/02H01L31/055Y02E10/50
Inventor 王建颖王珺王贤保
Owner HUBEI UNIV
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