Preparation method of chalcogenide/metal oxide core shell nano-pillar array

Abstract

The invention discloses a preparation method of a chalcogenide / metal oxide core shell nano-pillar array. The method comprises the following steps of: (1) dissolving soluble metal salt in deionized water to prepare a metallic salt solution; (2) adding a slow release type sulfur or selenium source to the metallic salt solution so as to obtain a weakly-ionized precursor solution of chalcogenide; (3) dropping a protective agent into the weakly-ionized precursor solution; (4) preparing a metal oxide nano-pillar array, and immersing the metal oxide nano-pillar array in the weakly-ionized precursor solution with the protective agent; (5) placing the above solid-liquid system in an ultrasonic water-bath environment, and utilizing ultrasonic waves to induce the precursor solution to generate high-speed microjets to impact the metal oxide nano-pillar array; and (6) taking the sample out, washing the sample with deionized water, placing the sample in a drying box for drying, and obtaining the chalcogenide / metal oxide core shell nano-pillar array. The method has the advantages that the operation steps are simple, the reaction time is short, the repeatability and the uniformity are good, and the method can be applied to large-scale production.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to the preparation of a chalcogen compound / metal oxide core-shell nanocolumn array, and its application field mainly relates to the field of quantum dot sensitized solar cells. Background technique [0002] In today's world, whether it is a highly industrialized developed country or a developing country in a period of rapid economic growth, the demand for energy is increasing day by day. However, the use of traditional energy sources such as coal, oil, and natural gas has caused serious environmental problems, and the development of new energy sources is imminent. Among many new energy sources, solar energy is rich in resources and widely used, and has become a market-oriented alternative energy source with great potential. Moreover, the study found that the energy produced by the sun shining on the earth's surface for one hour (4.3×10 20 J) Enough energy consumption of global ...

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Problems solved by technology

Although this method can accurately control the size of quantum dots and passivate its surface conveniently, it has two disadvantages: on the one hand, to obtain enough quantum dots, it is necessary to immerse the semiconductor oxide film in the quantum dots for a long time. On the other hand, the existence of the linking group will hinder the transfer process of excited electrons to the oxide, resulting in a lower photocurrent

However, when two methods of continuous ionic layer adsorption reaction and chemical bath deposition are used to grow metal chalcogenide quantum dots on metal oxide nanopillar arrays, it is easy for the quantum dots to aggregate on the top of the nanopillars, hindering the growth of the electrolyte solution. The contact with the nanopillar array and the transport of electrons and holes make the photoelectric performance of quantum dot-sensitized solar cells decrease or even lose their performance

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