Preparation method of fluorescent solar concentrator based on near-infrared luminescence of lead sulfide quantum dots

Abstract

The invention discloses a preparation method of a fluorescent solar concentrator based on near-infrared luminescence of lead sulfide quantum dots; the method is characterized by comprising the following steps of (1) preparing lead sulfide quantum dots with different sizes through a wet chemical method; (2) carrying out mixing on the lead sulfide quantum dots, a polydimethylsiloxane body and a curing agent to obtain a mixed solution, carrying out ultrasonic treatment on the mixed solution, uniformly mixing, drying in a vacuum drying oven, and pouring the mixed solution into a pretreated glass mold for curing; and performing curing and de-molding, and then cutting and polishing to prepare a fluorescent solar concentrator prototype device; and (3) enabling a metal film to be deposited by adopting a traditional thermal evaporation or electron beam evaporation method on the back surface of the fluorescent solar concentrator, and obtaining the fluorescent solar concentrator based on the leadsulfide quantum dots. The method has the advantages that the photon loss of the fluorescent solar concentrator can be better reduced, the preparation method is simple, the cost is low, the light stability is high, and the light collecting efficiency is high.

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 ...

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

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