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Preparation method of strontium cobalt stannate thin film with adjustable forbidden bandwidth

A technology of strontium cobalt stannate and bandgap width, which is applied in the field of semiconductor oxide thin film materials, can solve problems such as the difficulty in realizing the energy level matching of the hole transport layer, and achieve the effects of easy popularization and application, high stability, and simple operation

Inactive Publication Date: 2018-08-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the preparation of stannate, it is difficult to achieve energy level matching with the hole transport layer due to its wide forbidden band width (i.e. energy band gap width).

Method used

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  • Preparation method of strontium cobalt stannate thin film with adjustable forbidden bandwidth
  • Preparation method of strontium cobalt stannate thin film with adjustable forbidden bandwidth
  • Preparation method of strontium cobalt stannate thin film with adjustable forbidden bandwidth

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preparation example Construction

[0034] The invention relates to a strontium-cobalt stannate thin film with adjustable band gap based on cobalt-doped strontium stannate ceramics and a preparation method thereof, belonging to the technical field of semiconductor oxide thin film materials. The present invention adopts strontium source, tin source and cobalt source to mix and pre-fire the green body to make the strontium cobalt stannate ceramics prepared by calcining as the target material, and introduce the doping element cobalt into the alkaline earth metal strontium stannate, thus forming The perovskite light-absorbing material strontium-cobalt stannate thin film can realize the effective regulation of the energy band gap and broaden the light-absorbing range. The present invention combines strontium-cobalt stannate ceramics using cobalt sources including divalent and trivalent cobalt atoms with pulsed laser deposition technology with high component-preserving properties, and uses cobalt-doped strontium stanna...

Embodiment 1

[0060] Preparation of strontium cobalt stannate ceramic target:

[0061] (1) According to the atomic molar ratio Sr:Sn:Co=1:0.8:0.2 (ie x=0.2), weigh strontium carbonate, tin dioxide, and cobalt tetraoxide, put them into a ball mill jar, add ethanol to 1% of the volume of the ball mill jar / 3 places, ball milling time 8 hours. Then pre-calcine at 1200°C for 12 hours to obtain powder;

[0062] (2) Grind the pre-calcined powder obtained above for 1.5 hours, add the binder polyvinyl alcohol, the binder to the powder mass ratio is 15:80, and press it into a green body, and the pressure is 30MPa;

[0063] (3) calcining the above body at 1350° C. for 24 hours to obtain the strontium cobalt stannate ceramic target;

[0064] Preparation of strontium cobalt stannate ceramic film:

[0065] (1) Substrate preparation. Magnesium oxide (MgO) (001) orientation is selected as the substrate. The MgO substrate was ultrasonicated in acetone, ethanol, and deionized water for 10 minutes, and ...

Embodiment 2

[0072] Strontium cobalt stannate (SrSn 0.6 co 0.4 o 3 , ie x=0.4) ceramic target. All the other steps are the same as in Example 1.

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Abstract

The invention relates to a preparation method of a strontium cobalt stannate thin film with an adjustable forbidden bandwidth. Strontium cobalt stannate ceramics serve as target materials to prepare the strontium cobalt stannate thin film by combining a pulsed laser deposition technique. A preparation method of the strontium cobalt stannate ceramics includes the steps: mixing a strontium source, atin source and a cobalt source according to the atom mole ratio of Sr, Sn to Co of 1:(1-x):x, and pre-sintering mixture at the temperature of 800-1200 DEG C to obtain pre-sintering powder; grinding the pre-sintering powder, adding binding agents to prepare green bodies; calcining the green bodies at the temperature of 1000-1400 DEG C to obtain the strontium cobalt stannate ceramics, wherein 0<x<1. The optical transmittance and the energy band gap width of the strontium cobalt stannate extension thin film can be controlled and adjusted.

Description

technical field [0001] The invention relates to a preparation method of strontium cobalt stannate thin film, a material with adjustable band gap, and belongs to the technical field of semiconductor oxide thin film materials. Specifically, cobalt is doped with strontium stannate to prepare a thin film to broaden the light absorption range of the strontium-cobalt stannate thin film and reduce its bandgap width, so as to realize applications in optoelectronic devices, inductive voltage devices, solar cells and other fields. Background technique [0002] Exploring new photoelectric conversion materials with high conversion efficiency, high stability and low cost is an eternal theme of photovoltaic material research. The most popular solar cell at present belongs to the perovskite solar cell (PSC), which inherits and is born out of the dye-sensitized solar cell (DSSC), and is committed to solving some shortcomings of solar cells such as crystalline silicon and cadmium telluride, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/457C04B35/622C23C14/28C23C14/08C23C14/58
CPCC04B35/457C04B35/622C04B35/62222C04B2235/3213C04B2235/3277C23C14/08C23C14/28C23C14/5806
Inventor 高相东高东升李效民张彤彤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI