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A preparation method of a fluorescent solar concentrator based on near-infrared luminescence of lead sulfide quantum dots

A technology of quantum dots and lead sulfide, applied in the field of preparation of fluorescent solar concentrators, can solve the problems of low matching degree of optimal spectral response of solar cells, small refractive index of polymer matrix, and coupling loss of solar cells, etc., and achieve light stability Good compatibility, low cost and high matching effect

Active Publication Date: 2021-05-14
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a variety of quantum dots have been used in fluorescent solar concentrators, there are still many challenges in obtaining large-scale and high-efficiency fluorescent solar concentrators: (1) In the incident sunlight, only a part of the incident light will be absorbed Quantum dots absorb, and most of the near-infrared incident light escapes directly from the collector; (2) Due to the low refractive index of the polymer matrix, some emitted photons will fall into the escape cone and escape the collector; (3) Part of the emitted photons are due to Loss due to reabsorption; (4) Part of the luminous wavelength has a low matching degree with the optimal spectral response of the coupled solar cell, resulting in solar cell coupling loss

Method used

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  • A preparation method of a fluorescent solar concentrator based on near-infrared luminescence of lead sulfide quantum dots
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  • A preparation method of a fluorescent solar concentrator based on near-infrared luminescence of lead sulfide quantum dots

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Embodiment 1

[0027] A method for preparing a fluorescent solar concentrator based on lead sulfide quantum dots, comprising the following steps,

[0028] (1) Preparation of lead sulfide quantum dots: 0.64g of sulfur (S) was dissolved in 60mL of oleylamine (OLA) and heated to 120°C for 30min to obtain a sulfur-oleylamine (S-OLA) solution, followed by 2.22g of chlorine Lead (PbCl 2) mixed with 40mL oleylamine into a three-necked flask and heated to 100°C for 30min to obtain a lead chloride-oleylamine solution. Mix 12mL sulfur-oleylamine (S-OLA) solution with 12mL lead chloride-oleylamine And injected into a three-necked flask, when the growth time reaches 100min, add 80mL butanol and 40mL methanol solution to quench the reaction, after repeated centrifugation and cleaning, lead sulfide quantum dots are obtained;

[0029] (2) Production of fluorescent solar concentrators: Ultrasonic cleaning and absolute ethanol cleaning of the glass mold, and then wiping with absorbent paper until the surfac...

Embodiment 2

[0032] The same as the above-mentioned embodiment 1, the difference is that in step (1), the growth time of lead sulfide quantum dots reaches 120 minutes.

Embodiment 3

[0034] Same as the above-mentioned embodiment 1, the difference is that in step (1), the growth time of the lead sulfide quantum dots reaches 140 minutes.

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Abstract

The invention discloses a preparation method of a fluorescent solar concentrator based on near-infrared emission of lead sulfide quantum dots, which is characterized in that it comprises the following steps: (1) preparing lead sulfide quantum dots of different sizes by a wet chemical method; Lead quantum dots, polydimethylsiloxane matrix and curing agent are mixed to obtain a mixed solution. After the mixed solution is ultrasonically treated and mixed, it is placed in a vacuum drying oven for drying treatment, and the mixed solution is poured into the pretreated glass Curing in the mold; after curing and demoulding, the fluorescent solar collector prototype device is made by cutting and polishing; (3) on the back of the fluorescent solar collector, a layer of The metal film is used to obtain fluorescent solar collectors based on lead sulfide quantum dots. The advantage is that it can better reduce the photon loss of fluorescent solar collectors, and the manufacturing method is simple, low in cost, good in photostability and high in light collection efficiency.

Description

technical field [0001] The invention relates to a preparation method of a fluorescent solar collector, in particular to a preparation method of a fluorescent solar collector based on near-infrared emission of lead sulfide quantum dots. Background technique [0002] Because the traditional light concentrator will produce obvious thermal effect under long-term light, which will seriously affect the performance of the light concentrator, so a cooling system is needed to cool down. At the same time, a set of sun tracking system can ensure that the concentrator tracks the incident sunlight in real time to improve the utilization efficiency of solar energy. However, the cooling system and the sun tracking system greatly increase the cost of traditional concentrators, and the equipment is complicated. Instead, it has become a burden for the popularization and application of photovoltaic devices. Luminescent solar concentrator (LSC) is a very important optoelectronic device in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/055
CPCH01L31/055Y02E10/52
Inventor 束俊鹏张晓伟车锦铭陈王华陈凯旗张涵陈若望
Owner NINGBO UNIV