Unlock instant, AI-driven research and patent intelligence for your innovation.

Photoelectricity conversion thin film based on inorganic nano sheet and preparation method thereof

A photoelectric conversion and inorganic nanotechnology, applied in photosensitive equipment, photovoltaic power generation, circuits, etc., can solve the problems of low utilization rate of sunlight, achieve good application potential, broaden the scope of absorption and utilization, and enhance the effect of photocurrent response value

Inactive Publication Date: 2009-11-11
BEIJING UNIV OF CHEM TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to take advantage of the high photoreactivity of nanosheet semiconductors and overcome the problem of low utilization of sunlight, combined with its performance characteristics and structural characteristics, the electrostatic layer-by-layer self-assembly technology is used to use narrow-bandgap manganese dioxide nanosheets as photosensitizing materials. Sensitize the wide-bandgap titanium oxide nanosheet photoelectric conversion film, broaden the range of film absorption spectrum, and make it generate ultraviolet-visible light response current, which has not been reported in the literature so far

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
  • Photoelectricity conversion thin film based on inorganic nano sheet and preparation method thereof
  • Photoelectricity conversion thin film based on inorganic nano sheet and preparation method thereof
  • Photoelectricity conversion thin film based on inorganic nano sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the molar ratio of 1:5.1, 3.26g Cs 2 CO 3 and 4.07g TiO 2 After mixing and grinding, put it into a muffle furnace, calcinate at 800°C for 1 hour, cool to room temperature, grind, and calcinate at 800°C for 20 hours, grind again after cooling, and calcinate at 800°C for 20 hours to obtain a layered Cesium titanate CTO; then add 1.5g of CTO to 300mL of 1.0mol / L HCl and stir for 3 days, replace 1.0mol / L of HCl every 24 hours, and wash the product with double-distilled deionized water until neutral Proton titanate HTO was obtained; finally, 1.5 g of HTO and 450 mL of 0.017 mol / L TBAOH solution were stirred at room temperature for 10 days to obtain a milky white suspension, which was peeled off by high-speed centrifugation at 10,000 rpm for 1 time for 30 minutes. colloidal solution of titanium oxide nanosheets.

[0037] 200mL containing 0.6mol / L NaOH and 1.5mol / L H 2 o 2 The mixed solution was added to 100mL containing 0.4mol / L Mn(NO 3 ) 2solution, stir a...

Embodiment 2

[0041] According to the molar ratio of 1:5.5, 3.26g Cs 2 CO 3 and 4.39g TiO 2 After mixing and grinding, put it into a muffle furnace, calcinate at 900°C for 30 minutes, cool to room temperature and grind, calcinate at 900°C for 24 hours, grind again after cooling, and calcinate at 900°C for 24 hours to obtain layered titanium cesium acid CTO; then add 4g of CTO to 200mL 1.5mol / L HCl and stir for 4 days, replace 1.5mol / L HCl every 24 hours, and wash the product with double-distilled deionized water until neutral to obtain protons type titanate HTO; finally, 1.0 g of HTO and 250 mL of 0.5 mol / L TBAOH solution were stirred at room temperature for 7 days to obtain a milky white suspension, and then two 15-minute high-speed centrifugation at 12,000 rpm was performed to obtain Colloidal solution of titanium oxide nanosheets.

[0042] 200mL containing 0.6mol / L NaOH and 1.0mol / L H 2 o 2 The mixed solution was added to 100mL containing 0.3mol / L Mn(NO 3 ) 2 solution, stir and re...

Embodiment 3

[0048] The preparation process of the colloidal solution of titanium oxide nanosheets is the same as in Example 1.

[0049] The preparation process of the manganese dioxide nanosheet colloidal solution is the same as in Example 2.

[0050] The ITO substrate was ultrasonically cleaned with acetone, absolute ethanol, and double-distilled deionized water for 30 minutes in sequence; 6 mL of 30% H 2 o 2 Add 6mL of concentrated ammonia water with a mass fraction of 28% to 30mL of double-distilled deionized water to form a solution, then immerse the ITO substrate in the solution, boil for 60 minutes at 80°C for activation, and finally rinse with a large amount of double-distilled water clean with N 2 blow dry.

[0051] The preparation of the photoelectric conversion film containing titanium oxide and manganese dioxide nanosheets is the same as in Example 1, wherein the substrate is replaced by ITO, the number of assembly layers is reduced to 5 layers, and then the film is bonded t...

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
current densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a photoelectric conversion thin film based on an inorganic nano-sheet and preparation method thereof, which belongs to field of photoelectric conversion of narrow band gap semiconductor sensitized wide band gap semiconductor. Structure of the photoelectric conversion thin film is substrate / PEI / [(ns-TiO2+ns-MnO2) / PDDA]n-1 / (ns-TiO2+ns-MnO2), the preparation method of the photoelectric conversion thin film includes: forming titanium oxide nano-sheet and manganese dioxide nano-sheet colloidal solution by striping lamellate titanate and lamellate manganese dioxide precursor respectively, mixing the titanium oxide nano-sheet and manganese dioxide nano-sheet colloidal solution in proportion, alternately assembling the mixed colloidal solution and polycation PDDA on a substrate by static layer self-assembly. Electronic energy level of conduction band and valence band of the manganese dioxide nano-sheet is built in forbidden band of the titanium oxide nano-sheet to build a transition platform for photoelectron and broaden solar spectrum absorption utilization range of the thin film, so that photoelectric response can be generated in ultraviolet and visible light region, photocurrent response value under analog sunlight greatly increases.

Description

technical field [0001] The invention belongs to the technical field of photoelectric conversion of narrow-bandgap semiconductors sensitized to wide-bandgap semiconductors, and provides a photoelectric conversion thin film based on inorganic nanosheets and a preparation method thereof. In particular, it relates to a photoelectric conversion thin film with a narrow bandgap manganese dioxide nanosheet as a photosensitizer to sensitize a wide bandgap titanium oxide nanosheet and an electrostatic layer-by-layer self-assembly preparation method thereof. The prepared photoelectric conversion thin film can be applied to solar cells, photosensitive sensors, photocatalysis and photodegradation, etc., and belongs to the technical field of photoelectrochemical solar energy conversion. technical background [0002] Titanium dioxide is a semiconductor material with stable chemical properties, environmental friendliness, low cost and easy availability, and has been widely used in the field...

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 Patents(China)
IPC IPC(8): H01L31/052H01L31/18H01L51/42H01L51/48H01G9/20H01M14/00
CPCY02E10/52Y02E10/549Y02P70/50
Inventor 杨文胜刘旸
Owner BEIJING UNIV OF CHEM TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com