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Low-temperature in-situ constructed BiOI/Bi2S3 heterojunction thin film and flexible photoelectrochemical solar cell device

A solar cell and heterojunction technology, applied in electrolytic capacitors, capacitors, electrical components, etc., can solve the problems of uneven film formation, high reaction temperature, inability to achieve low temperature, low cost, environmental protection, and rapidity, and achieve uniform thin film, Simple and convenient operation, high energy conversion efficiency

Active Publication Date: 2014-05-07
XUCHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the construction method of the above-mentioned heterojunction may have the disadvantages of high reaction temperature, strict requirements on instruments, or uneven film formation, etc., and cannot achieve low-temperature, cheap, environmentally friendly, rapid and large-scale preparation of heterojunctions. Preparation of textured thin films

Method used

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  • Low-temperature in-situ constructed BiOI/Bi2S3 heterojunction thin film and flexible photoelectrochemical solar cell device
  • Low-temperature in-situ constructed BiOI/Bi2S3 heterojunction thin film and flexible photoelectrochemical solar cell device
  • Low-temperature in-situ constructed BiOI/Bi2S3 heterojunction thin film and flexible photoelectrochemical solar cell device

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Experimental program
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Effect test

Embodiment 1

[0043] 1) Preparation: Cut the ITO / PET flexible substrate to 2×2cm 2 Tear off the protective film on its surface, place the conductive side up, and place it under an ozone-generating ultraviolet lamp (power 14 watts, ultraviolet electronic ballast model BS--ZSZ141E) for 15 minutes , and then soaked in absolute ethanol for use, and then take out the substrate and dry it at room temperature before use. Prepare a large amount of 5mM bismuth nitrate aqueous solution, 5mM potassium iodide aqueous solution and 5mM thioacetamide aqueous solution stock solution;

[0044] 2) BiOI / Bi 2 S 3 Preparation of heterojunction thin film: Take four 50mL small beakers, add 40mL bismuth nitrate aqueous solution, 40mL deionized water, 40mL potassium iodide aqueous solution and 40mL deionized water respectively, and dry and clean ITO / PET in the above-mentioned Immerse in four solutions for 15 seconds, which is a cycle, repeat 30 cycles (replace the reaction solution and deionized water every 15 c...

Embodiment 2

[0047] 1) Preparation: Cut the ITO / PET flexible substrate to 2×2cm 2 Tear off the protective film on its surface, place the conductive side up, and place it under an ozone-generating ultraviolet lamp (power 14 watts, ultraviolet electronic ballast model BS--ZSZ141E) for 15 minutes , and then soaked in absolute ethanol for use, and then take out the substrate and dry it at room temperature before use. Prepare a large amount of 5mM bismuth nitrate aqueous solution, 5mM potassium iodide aqueous solution and 5mM thioacetamide aqueous solution stock solution;

[0048]2) Reaction steps: Take four 50mL small beakers, add 40mL of the above-mentioned bismuth nitrate aqueous solution, 40mL of deionized water, 40mL of the above-mentioned potassium iodide aqueous solution and 40mL of deionized water, and put the dry and clean ITO / PET in the above four solutions in turn Immerse in the medium for 15 seconds, which is a cycle, repeat 30 cycles, replace the reaction solution and deionized wa...

Embodiment 3

[0051] 1) Preparation: Cut the ITO / PET flexible substrate to 2×2cm 2 Tear off the protective film on its surface, place the conductive side up, and place it under an ozone-generating ultraviolet lamp (power 14 watts, ultraviolet electronic ballast model BS--ZSZ141E) for 15 minutes , and then soaked in absolute ethanol for use, and then take out the substrate and dry it at room temperature before use. Prepare a large amount of 5mM bismuth nitrate aqueous solution, 5mM potassium iodide aqueous solution and 5mM thioacetamide aqueous solution stock solution;

[0052] 2) Reaction steps: take four 50mL small beakers, add 40mL of the above-mentioned bismuth nitrate aqueous solution, 40mL of deionized water, 40mL of the above-mentioned potassium iodide aqueous solution and 40mL of deionized water, and put the dry and clean ITO / PET in the above four Immerse in the solution for 15 seconds, which is a cycle, repeat 30 cycles, replace the reaction solution and deionized water every 15 cy...

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Abstract

The invention relates to a BiOI / Bi2S3 heterojunction thin film and a flexible photoelectrochemical solar cell device. The BiOI / Bi2S3 heterojunction thin film is shaped like a film which is composed of staggered nanosheet-like structured BiOI grown on a ITO / PET flexible substrate and nanosphere-like Bi2S3 dispersed on the surface and edge of the nanosheet-like BiOI, wherein the thickness of the BiOI nanosheet is in the range from 10nm to 40nm, and the particle size of the Bi2S3 is in the range from 10nm to 200nm. The flexible photoelectrochemical solar cell device comprises the BiOI / Bi2S3 heterojunction thin film used as a photoelectric active electrode, the Pt-sprayed ITO / PET flexible substrate of the electrode and electrolyte filled between the photoelectric active electrode and the electrode. The construction method of the BiOI / Bi2S3 heterojunction thin film is simple, and the photoelectrochemical solar cell device constructed by using the BiOI / Bi2S3 heterojunction thin film as the active electrode has the advantage of high photoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, in particular to a BiOI / Bi prepared in situ and in a large area under low temperature conditions. 2 S 3 Heterojunction thin films and flexible photoelectrochemical solar cell devices. Background technique [0002] The human demand for clean energy inspires scientific research institutions to use new and effective methods to capture and store solar energy. A photoelectrochemical cell is a liquid junction solar cell that can directly convert light energy into electrical energy by using a photoactive electrode. As early as the 1970s, the research group of Wrighton and Bard described the structure diagram of a liquid junction photoelectrochemical cell. However, The field of solar cells has been dominated by solid-junction solar cells—mainly silicon-based solar cells. Until 1991, Brian O'Regan and Michael The dominance of solid-junction cells has been challenged by the introducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
Inventor 郑直方铭清张礼知贾会敏雷岩张艳鸽法文君
Owner XUCHANG UNIV
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