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

Preparation method of stable nanocrystal with NaYF4:Yb3+/Er3+@BiOCL (bismuth oxychloride) core-shell structure

A core-shell structure and nanocrystal technology is applied in the field of preparation of NaYF4:Yb3+/Er3+@BiOCl composite materials, which can solve problems such as low photoelectric conversion efficiency, and achieve the effects of low cost of raw materials, simple equipment and convenient operation process.

Active Publication Date: 2018-12-21
HARBIN INST OF TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the existing NaYF 4 :Yb 3+ / Er 3+ The technical problem of low photoelectric conversion efficiency of up-conversion base dye-sensitized solar cells provides a stable NaYF 4 :Yb 3+ / Er 3+ Preparation method of @BiOCl core-shell nanocrystals

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
  • Preparation method of stable nanocrystal with NaYF4:Yb3+/Er3+@BiOCL (bismuth oxychloride) core-shell structure
  • Preparation method of stable nanocrystal with NaYF4:Yb3+/Er3+@BiOCL (bismuth oxychloride) core-shell structure
  • Preparation method of stable nanocrystal with NaYF4:Yb3+/Er3+@BiOCL (bismuth oxychloride) core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] Specific embodiment one: the stable NaYF of this embodiment 4 :Yb 3+ / Er 3+ The preparation method of @BiOCl core-shell structure nanocrystals is carried out according to the following steps:

[0019] 1. BiCl 3 Add to ethylene glycol, heat to 60~65°C and stir evenly to get BiCl 3 solution;

[0020] Second, the NaYF 4 :Yb 3+ / Er 3+ Add to BiCl 3 solution, stir evenly, cool to room temperature, and adjust the pH of the solution to 8~9, reheat to 60~65°C and stir for 0.5~1h, then cool and stand still, remove the supernatant, add ethanol and stir evenly, Put it in an oven and dry it at 40-60°C to get BiOCl-coated NaYF 4 :Yb 3 + / Er 3+ Nanocrystalline;

[0021] 3. The NaYF coated with BiOCl prepared in step 2 4 :Yb 3+ / Er 3+ Nanocrystals are placed in an alumina crucible, and then the alumina crucible is placed in a muffle furnace, heated to 200-300°C for 1-3 hours in an air atmosphere, and then cooled naturally to obtain a stable NaYF 4 :Yb 3+ / Er 3+ @BiO...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the BiCl in step one 3 The ratio of the amount of the substance to the volume of ethylene glycol is 1 mmol: (15-20) mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that NaYF in step two 4 :Yb 3+ / Er 3+ with BiCl 3The molar ratio is 1:(0.1~0.2). Others are the same as in the first or second embodiment.

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
Flow densityaaaaaaaaaa
Short circuit current densityaaaaaaaaaa
Current densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a stable nanocrystal with a NaYF4:Yb3+ / Er3+@BiOCL (bismuth oxychloride) core-shell structure. The preparation method of the stable nanocrystal with theNaYF4:Yb3+ / Er3+@BiOCL core-shell structure aims at solving the technical problem of low photoelectric conversion efficiency in the existing NaYF4:Yb3+ / Er3+ up-conversion dye-sensitized solar battery.The preparation method comprises the following steps of 1, preparing a BiCl3 (bismuth trichloride) solution; 2, adding NaYF4:Yb3+ / Er3+ into the BiCl3 solution, so as to obtain the BiOCL-coated NaYF4:Yb3+ / Er3+ nanocrystal; 3, sintering the BiOCL-coated NaYF4:Yb3+ / Er3+ nanocrystal, so as to obtain the stable nanocrystal with the NaYF4:Yb3+ / Er3+@BiOCL core-shell structure. A light anode of the dye-sensitized solar battery prepared from the nanocrystal has the advantage that the battery efficiency is improved by 10% to 14% than the untreated NaYF4:Yb3+ / Er3+ material, so that the nanocrystal can be applied into the dye-sensitized solar battery.

Description

technical field [0001] The present invention relates to NaYF 4 :Yb 3+ / Er 3+ Preparation methods of @BiOCl composites. Background technique [0002] At present, the effective use of sunlight accounts for only one ten-thousandth of the solar energy reaching the earth's surface, and it is expected that solar energy will be able to meet most of the energy needs in the future. Dye-sensitized solar cells (DSSCs) are considered to be ideal substitutes for silicon-based solar cells because of their low price, no pollution, and relatively high photoelectric conversion efficiency. N719, as its core dye, can only absorb 400-700nm visible band sunlight Infrared solar photons, which account for about 55% of the solar spectrum, cannot be used, which limits the improvement of the photoelectric conversion efficiency of cells. The up-conversion process can superimpose two photons with an energy lower than the N719 band gap, and emit an up-conversion photon with an energy greater than th...

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
IPC IPC(8): C09K11/85C09K11/02H01G9/20
CPCC09K11/02C09K11/7773H01G9/20Y02E10/542Y02P70/50
Inventor 郝树伟侯月丹杨春晖
Owner HARBIN INST OF TECH
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