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A cuprous oxide-based heterojunction photocathode and its preparation method

A cuprous oxide-based, cuprous oxide technology is applied in the plating and coating of electrodes and superimposed layers, which can solve the problems of too thick, fragile cuprous oxide films, and inconvenient assembly steps, and improve the film quality. , low cost, rich storage effect

Active Publication Date: 2019-06-07
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem faced by this method is that, on the one hand, the cuprous oxide film obtained by this method is very brittle and fragile, which brings inconvenience to the subsequent assembly steps; on the other hand, the thickness of cuprous oxide as a light absorbing layer is still too thick

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  • A cuprous oxide-based heterojunction photocathode and its preparation method
  • A cuprous oxide-based heterojunction photocathode and its preparation method

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Embodiment 1

[0041] Preparation of cuprous oxide-based heterojunction photocathode, the structure is as follows figure 1 As shown, it includes the following steps: 1) Put a copper sheet with a purity of 99.99% and a thickness of 100 μm in a corundum crucible, and oxidize it into a cuprous oxide sheet in a tube furnace. The specific steps are:

[0042] a) Put the copper sheet in the tube furnace, pump out the air, and pass in the argon gas to keep the argon atmosphere.

[0043] Raise the temperature to 1050°C at a rate of 15°C / min, and keep it warm for one hour.

[0044] b) At a temperature of 1050°C, air is introduced and the temperature is kept for one hour.

[0045] c) At a temperature of 1050°C, the air is pumped out again, and argon gas is introduced, under the protection of argon gas

[0046] Keep warm for two hours.

[0047] d) Under argon protection, cool down to 500°C at 10°C / min, and then cool naturally to

[0048] Remove from room temperature.

[0049] 2) The above-mentione...

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Abstract

The invention discloses a cuprous-oxide-based heterojunction photocathode and a preparation method thereof. The cuprous-oxide-based heterojunction photocathode structurally comprises a gold electrode layer, a cuprous oxide layer, an aluminum-doped zinc oxide layer, a titanium dioxide layer and a platinum cocatalyst layer from bottom to top and is packaged with epoxy resin. The preparation method of the cuprous-oxide-based heterojunction photocathode comprises the steps that firstly, a cuprous oxide slice is prepared through a thermal oxidation method, and the cuprous oxide slice serves as a light absorption layer and also serves as a substrate of the photocathode; a layer of gold electrode is deposited on one side of the cuprous oxide substrate, a wire is led out, and the side is packaged with epoxy resin glue; then, after the other side of the cuprous oxide substrate is etched, the aluminum-doped zinc oxide layer and the titanium dioxide layer are deposited in sequence, and the edges are packaged through the epoxy resin glue; and finally, platinum particles are deposited on the surface of titanium dioxide to serve as cocatalysts. By means of the cuprous-oxide-based heterojunction photocathode and the preparation method of the cuprous-oxide-based heterojunction photocathode, the difficulty in preparing the photocathode with the cuprous oxide substrate prepared through the thermal oxidation method is greatly lowered, the preparation process is simple, the light current is high, and wide development prospect is achieved.

Description

technical field [0001] The invention relates to a photocathode and a preparation method thereof, in particular to a cuprous oxide-based heterojunction photocathode and a preparation method thereof, belonging to the technical field of photoelectric catalysis. Background technique [0002] Nowadays, in the face of energy crisis and environmental pollution, the demand for sustainable clean energy has greatly increased, which has promoted the research of energy and energy materials. Solar energy is the most promising sustainable energy source. There are many ways to utilize solar energy. In addition to converting solar energy into thermal energy and electrical energy, it can also be converted into chemical energy. One of the methods is to hydrolyze water into hydrogen and oxygen. In order to achieve the purpose of photoelectrocatalytic hydrogen production, there are certain requirements for the material of the photoelectrode. The conduction band bottom of the photoelectrode mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/04C23C28/00
CPCC23C28/32C23C28/3455C25B1/04C25B1/55C25B11/051Y02E60/36
Inventor 朱丽萍牛文哲王怡尘覃超
Owner ZHEJIANG UNIV
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