Method for preparing quantum dot solar battery based on light absorption coating

Abstract

The invention discloses a method for preparing a quantum dot solar battery based on a light absorbing coating, and belongs to the field of solar batteries. The method comprises the steps that a semiconductor quantum dot is loaded on broadband gap material nanocrystalline particles to obtain a brand-band gap material / quantum dot complex; the brand-band gap material / quantum dot complex is used for preparing the light absorbing coating capable of absorbing sunlight; due to the screen printing technology, the light absorption coating is printed on a conductive glass substrate to obtain a photo-anode; the photo-anode, an electrolyte and a counter electrode are assembled into the quantum dot solar battery of the sandwiched structure. The method is easy and convenient to implement, economical andrapid; the prepared light absorption coating is low in cost, the preparation process needs not high temperature sintering, energy consumption is lowered, and the production cost is lowered; the method is applicable to preparing large-area devices, and the application prospect of the quantum dot solar battery is improved.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a method for preparing quantum dot solar cells based on light-absorbing coatings. Background technique [0002] With the depletion of traditional fossil energy, people urgently seek a low-cost, environmentally friendly alternative energy to meet the sustainable development of society, so researchers turn their attention to solar energy. Solar cells are devices that directly convert solar energy into electrical energy, and are an important means of solar energy utilization. Quantum dot solar cells belong to the third generation of solar cells. Quantum dots as light-absorbing materials have the advantages of high extinction coefficient, adjustable light absorption range, high stability and low cost, so they have received extensive attention and research. A quantum dot solar cell consists of three parts: a photoanode loaded with a light-absorbing material, an electrolyte, and a counter e...

AI Technical Summary

Problems solved by technology

Due to the relatively small size of anions and cations, they can penetrate well into the nanopores of the photoanode, so this method can achieve high quantum dot loading on the photoanode, but the defect state density of the obtained quantum dots is high and the size distribution wide, thereby limiting the improvement of photovoltaic performance of the corresponding solar cells; (2) pre-preparing quantum dot materials, and then loading quantum dots on the photoanode by direct adsorption, bifunctional molecular linking or electrophoretic assistance

This method can obtain high-quality quantum dot materials, but due to the large size of quantum dots, it is not conducive to penetration and adsorption in the mesoporous membrane of the photoanode, so that the loading capacity on the photoanode is small

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