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Chromium-doped barium stannate nanoporous film with adjustable band gap width and preparation method thereof

A nanoporous, barium stannate technology, applied in nanotechnology for information processing, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as difficult to achieve energy level matching of hole transport layers, Achieve the effects of controllable adjustment of optical transmittance, easy popularization and application, and controllable adjustment of energy bandgap width

Inactive Publication Date: 2019-05-07
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] In the preparation of stannate, due to its wide band gap, it is difficult to achieve energy level matching with the hole transport layer

Method used

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  • Chromium-doped barium stannate nanoporous film with adjustable band gap width and preparation method thereof
  • Chromium-doped barium stannate nanoporous film with adjustable band gap width and preparation method thereof
  • Chromium-doped barium stannate nanoporous film with adjustable band gap width and preparation method thereof

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preparation example Construction

[0039] The invention relates to a chromium-doped barium stannate nanoporous film with adjustable band gap and a preparation method thereof. The nanoporous film is coated with a precursor colloid solution obtained by mixing chromium-doped barium stannate nanoparticles and an organic solvent Obtained after heat treatment on the substrate, the main component (inorganic component) of the chromium-doped barium stannate nanoporous film is BaSn 1- x Cr x o 3 , where 0≤x≤0.5, where Cr atoms replace BaSnO 3 The Sn bit in . The chromium-doped barium stannate nanoporous film with adjustable band gap is formed by depositing a chromium-doped barium stannate nanoporous film on a substrate. The preparation method may include: using a solid material with a planar structure such as fluorine-doped tin oxide transparent conductive glass (FTO) as a substrate, selecting chromium-doped barium stannate nanoparticles and mixing an organic solution to prepare a precursor colloid solution, coating ...

Embodiment 1

[0058] (1) Substrate preparation. Fluorine-doped tin oxide transparent conductive glass (FTO) is selected as the substrate. The FTO substrate was ultrasonicated in acetone, ethanol, and deionized water for 10 minutes, and then dried in a dry nitrogen environment;

[0059] (2) Precursor colloidal solution preparation. Take by weighing 100mg particle diameter and be the barium stannate (BaSnO 3 ) Nanoparticles were dispersed into 50ml ethylene glycol monomethyl ether under magnetic stirring, stirred for 12 hours, then super-dispersed for 12 hours, and finally obtained barium stannate precursor colloidal solution;

[0060] (3) Film preparation. Extract 50 μl of barium stannate precursor colloidal solution and drop it on the FTO substrate, then pre-spin coat at 1000 rpm for 5 seconds, then spin coat at 4000 rpm for 30 seconds, repeat this step 4 times , to obtain a barium stannate precursor film with a thickness of about 370nm;

[0061] (4) heat treatment. The obtained bariu...

Embodiment 2

[0070] Preparation of BaSn 0.95 Cr 0.05 o 3 nanoporous film

[0071] Select 100mg of chromium-doped barium stannate (BaSn) with a particle size of 25nm 0.95 Cr 0.05 o 3 ) nanoparticles were dispersed in 50ml ethylene glycol monomethyl ether to prepare precursor colloid solution. All the other steps are the same as in Example 1.

[0072] The structure, morphology and performance of the above-mentioned nanoporous film with adjustable band gap were tested and analyzed.

[0073] Depend on figure 2 It can be seen that the BaSn prepared in Example 2 0.95 Cr 0.05 o 3 Crystal Structure of Nanoporous Thin Films and Cubic BaSnO 3 same. Its field emission scanning electron microscope pictures are as follows: Figure 3b , and its atomic force microscope picture is as Figure 4b , BaSn 0.95 Cr 0.05 o 3 The surface root mean square roughness of the nanoporous film is 50.5nm. Depend on Figure 6a , 6b It can be seen that the obtained nanoporous film has certain optical a...

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Abstract

The invention relates to a chromium-doped barium stannate nanoporous film with an adjustable band gap width and a preparation method thereof. The nanoporous film is obtained by coating a substrate with a precursor colloid solution obtained by mixing chromium-doped barium stannate nanoparticles with an organic solvent and then subjecting the substrate to heat treatment. The inorganic component of the chromium-doped barium stannate nanoporous film is BaSn1-xCrxO3, wherein 0<=x<=0.5.

Description

technical field [0001] The invention relates to a material with adjustable bandgap width-a chromium-doped barium stannate nanoporous film and a preparation method thereof, belonging to the technical field of semiconductor oxide film materials. 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, such as conversion efficiency. Low price, high price of precious metal dyes, and volatile leakage of liquid electrolyte. [0003] At present, the light-absorbing layer of perovskite solar cells is still based on organic-inorganic composite halogen perovskite materials (methylamine ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y10/00B82Y30/00
CPCY02E10/549
Inventor 高相东张彤彤杨京南吴永庆
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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