Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Single-crystal particle film and preparation method of substrate-free flexible solar cell employing single-crystal particle film

A technology of solar cells and single crystal particles, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the adverse effects of CZTS and CZTSSe battery performance, the difficulty of high-efficiency thin film battery preparation and performance optimization, and the accompanying problems and other issues to achieve the effect of reducing the impact of defects and interface impurities on device performance

Active Publication Date: 2015-12-16
LINGNAN NORMAL UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with binary and ternary semiconductors, semiconductors such as CZTS and CZTSSe have more complex physical properties due to the increase of constituent elements, making the preparation and performance optimization of high-efficiency thin-film batteries more difficult; while CZTS and CZTSSe The thermodynamically stable region of the phase is very small, and various impurity phases, metastable phases and CZTS compete with each other. Therefore, in the preparation process of CZTS and CZTSSe thin films, various binary and ternary impurity phases and some metastable phases are easily accompanied. Ultimately, it will adversely affect the performance of CZTS and CZTSSe batteries, which is a great challenge for the composition controllable preparation of CZTS and CZTSSe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-crystal particle film and preparation method of substrate-free flexible solar cell employing single-crystal particle film
  • Single-crystal particle film and preparation method of substrate-free flexible solar cell employing single-crystal particle film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment is to use CZTS single crystal particles to prepare solar cells, including the following steps:

[0050] (1) Preparation of CZTS single crystal particles:

[0051] 1. Preparation of Cu by hydrothermal method 2 ZnSnS 4 Nanoparticles: 2mmol CuCl 2 2H 2 O, 1mmol ZnCl 2 , 1mmolSnCl 4 ·5H 2 O was dissolved in 30mL deionized water and stirred for 10min to obtain clear solution A; 5mmol thiourea was dissolved in 20ml deionized water and stirred for 10min to obtain clear solution B; solution B was slowly added to solution A under stirring to obtain white turbidity solution, stirred for 10min to obtain a mixed solution, moved the mixed solution into a 100ml polytetrafluoroethylene autoclave and placed the autoclave at 180°C for 16h, cooled to room temperature and centrifuged at 8000r / min with deionized water and absolute ethanol respectively Separate and dry at 60°C for 8 hours to obtain a black sample, namely CZTS nanoparticles.

[0052] 2. Preparation of...

Embodiment 2

[0067] The experimental method is the same as in Example 1, the only difference is the preparation of CZTS single crystal particles, including the following steps:

[0068] 1. Preparation of Cu by hydrothermal method 2 ZnSnS 4 Nanoparticles: the same as in Example 1.

[0069] 2. Weigh the reaction raw materials 18mmolCuS, 12mmolZnS, 10mmolSn powder, 10mmolS powder and flux 50mmolCsCl, and add 1mmolCZTS nanoparticles to mix and grind thoroughly to make it mix evenly; put the mixed sample after grinding evenly into a quartz bottle, pass three The through valve is vacuumed by the vacuum pump unit to reach 10-10 2 Pa (can also be protected with inert gas), so as to eliminate the influence of air on the molten salt reaction, seal the quartz bottle with an oxyhydrogen flame; place the sealed quartz bottle with mixed samples in an ordinary heating furnace to heat from normal temperature to 850 Keep the temperature at ℃ for 72 hours, then cool down to about 600℃, take out the quart...

Embodiment 3

[0071] The experimental method is the same as in Example 1, the only difference is the preparation of CZTS single crystal particles, including the following steps:

[0072] 1. Preparation of Cu by hydrothermal method 2 ZnSnS 4 Nanoparticles: the same as in Example 1.

[0073] 2. Weigh the reaction raw materials 18mmolCu, 12mmolZn, 10mmolSn powder, 40mmolS powder and flux 80mmolCsCl, and add 2mmolCZTS nanoparticles to mix and grind fully to make it mix evenly; put the mixed sample after grinding evenly into a quartz bottle, pass three The through valve is vacuumed by the vacuum pump unit to reach 10-10 2 Pa (can also be protected with inert gas), so as to eliminate the influence of air on the molten salt reaction, seal the quartz bottle with an oxyhydrogen flame; place the sealed quartz bottle with mixed samples in an ordinary heating furnace to heat from normal temperature to 850 Keep the temperature at ℃ for 72 hours, then cool down to about 600℃, take out the quartz bottle ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a single-crystal particle film and a preparation method of a substrate-free flexible solar cell employing the single-crystal particle film. With an organic polymer material as a binder, micron-sized CZTS and CZTSSe single-crystal particles are mixed into the binder; the single-crystal particle film is prepared by a coating method; the single-crystal particles leaking from the binder on two surfaces are removed through mechanical grinding and plasma etching; and functional layers such as a buffer layer, a window layer and an electrode are prepared, so as to form an entire battery structure. Preparing, screening, cleaning and passivating processes of the single-crystal particles and the preparation process of a single-crystal particle absorption layer are separate, and a harsh high-temperature environment can be used in the preparation and optimization processes of the single-crystal particles, so that effective control on components of CZTS and CZTSSe is achieved; the effects to a substrate, the window layer, the buffer layer and the like caused by preparation conditions of the absorption layer do not need to be considered; and the method has significant advantages in the aspects of material and energy utilization rate and industrial production.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic materials and devices, and more specifically, to a method for preparing a single crystal particle film and a substrate-free flexible solar cell. Background technique [0002] Copper-zinc-tin-sulfur (CZTS) quaternary compound and copper-zinc-tin-sulfur-selenide (CZTSSe) semiconductor are considered to be the most promising alternatives to Cu(In,Ga)Se 2 Novel compound semiconductors for the absorber layer of thin-film solar cells. First, from the perspective of crystal structure, kesterite-type CZTS is replaced by Zn and Sn in the chalcopyrite phase CuIn 2 The two In in S evolved, therefore, the preparation method and cell structure of CIGS are generally applicable to CZTS. CZTS and CZTSSe are also direct bandgap p-type semiconductors with large light absorption coefficients (>10 4 cm), its band gap is 1.5eV, Cu 2 ZnSnS 4 The bandwidth of CZTS is adjustable between 1.5eV...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032H01L21/02C30B1/00C30B29/46
CPCC30B1/00C30B29/46H01L21/0242H01L21/02568H01L21/02628H01L31/0326Y02E10/50
Inventor 张军邵乐喜廖峻莫德云
Owner LINGNAN NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com