A kind of halogen-doped lead-oxygen compound nanocrystal and its preparation method and use

A compound and nanocrystal technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problems of rare n-type PbY nanocrystals, achieve the effect of increasing the thickness of the active layer, improving the conversion efficiency, and increasing the built-in electric field

Inactive Publication Date: 2017-03-22
SUZHOU UNIV
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the most studied PbS nanocrystals, surface oxidation makes most of the nanocrystals synthesized by traditional methods appear as p-type, and n-type PbY nanocrystals are rarely reported.

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
  • A kind of halogen-doped lead-oxygen compound nanocrystal and its preparation method and use
  • A kind of halogen-doped lead-oxygen compound nanocrystal and its preparation method and use
  • A kind of halogen-doped lead-oxygen compound nanocrystal and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of chlorine-doped PbS nanocrystals.

[0040] 1) Add 223 mg (1 mmol) lead oxide, 700 mg (2.5 mmol) oleic acid and 10 g 1-octadecene into a three-necked flask, stir and vacuumize at 100 °C for 1 h to obtain a lead precursor, stand-by;

[0041] 2) Nitrogen was introduced into the three-necked flask, and the temperature was adjusted to 120°C, 8.75 μL (0.1 mmol) TMSCl, 105 μL (0.5 mmol) (TMS) 2 After S and 5 mL of 1-octadecene were mixed evenly, they were quickly injected into the above-mentioned lead precursor with a syringe, and the reaction was continued for 5 min;

[0042]3) After the reaction is completed, lower the water bath to room temperature, inject 8 mL of anhydrous n-hexane, transfer the reaction solution to a centrifuge tube, add isopropanol until the reaction solution becomes cloudy, and centrifuge in a centrifuge (8000 rpm) for 5 min Finally, discard the upper layer, then dissolve it with n-hexane, add acetone and centrifuge, discard t...

Embodiment 2

[0043] Example 2: Preparation of chlorine-doped PbS nanocrystals.

[0044] 1) Add 223 mg (1 mmol) lead oxide, 700 mg (2.5 mmol) oleic acid and 10 g 1-octadecene into a three-necked flask, stir and vacuumize at 110 °C for 2 h to obtain a lead precursor, stand-by;

[0045] 2) Nitrogen gas was introduced into the three-necked flask, and the temperature was adjusted to 120°C. 17.5 μL (0.2 mmol) TMSCl, 105 μL (0.5 mmol) (TMS) 2 After S and 5 mL of 1-octadecene were mixed evenly, they were quickly injected into the above-mentioned lead precursor with a syringe, and the reaction was continued for 5 min;

[0046] 3) After the reaction is completed, lower the water bath to room temperature, inject 8 mL of anhydrous n-hexane, transfer the reaction solution to a centrifuge tube, add isopropanol until the reaction solution becomes cloudy, and centrifuge in a centrifuge (8000 rpm) for 5 min Finally, discard the upper layer, then dissolve it with n-hexane, add acetone and centrifuge, disc...

Embodiment 3

[0047] Example 3: Preparation of chlorine-doped PbS nanocrystals.

[0048] 1) Add 223 mg (1 mmol) lead oxide, 700 mg (2.5 mmol) oleic acid and 10 g 1-octadecene into a three-neck flask, stir and vacuumize at 110 °C for 1 h to obtain a lead precursor, stand-by;

[0049] 2) Infuse nitrogen gas into the three-necked flask, and adjust the temperature to 120°C, mix 27 μL (0.3 mmol) TMSCl, 105 μL (0.5 mmol) (TMS) 2 After S and 5 mL of 1-octadecene were mixed evenly, they were quickly injected into the above-mentioned lead precursor with a syringe, and the reaction was continued for 5 min;

[0050] 3) After the reaction is completed, lower the water bath to room temperature, inject 8 mL of anhydrous n-hexane, transfer the reaction solution to a centrifuge tube, add isopropanol until the reaction solution becomes cloudy, and centrifuge in a centrifuge (8000 rpm) for 5 min Finally, discard the upper layer, then dissolve it with n-hexane, add acetone and centrifuge, discard the upper ...

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

No PUM Login to view more

Abstract

The invention discloses a halogen-doped lead-oxygen compound nanocrystal and a preparation method and application thereof. Specifically, the method of the present invention comprises the following steps: 1) using lead reagent, oleic acid and 1-octadecene to prepare a lead precursor; 2) using trimethylsilyl halogen compounds, bis(trimethylsilyl ) reacting the oxo compound, 1-octadecene and the lead precursor obtained in step 1); 3) obtaining halogen-doped lead oxo compound nanocrystals through post-processing. The present invention uses a precursor containing halogen elements, has good compatibility with the precursor containing oxygen elements, can be almost arbitrarily dissolved in each other, and has a simple and easy preparation method. Compared with the traditional Schottky structure, the open-circuit voltage and short-circuit current of the device are greatly improved, while the fill factor has only a very small attenuation, and the conversion efficiency is increased by nearly 75%.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a halogen-doped lead-oxygen compound nanocrystal, its preparation method, and its use in preparing solar cells. Background technique [0002] PbY (Y=sulfur, selenium, tellurium) of groups IV-VI has a large Bohr radius, making its quantum confinement effect particularly significant. Through size adjustment, the bandgap of nanocrystalline materials can be greatly adjusted, and its absorption spectrum can be well matched with the solar spectrum reaching the earth's surface. At the same time, it has the properties of large absorption coefficient, high electron mobility, and adjustable energy level. , making IV-VI quantum dots the most popular photovoltaic nanomaterials at this stage, and is expected to become a low-cost, high-efficiency solar cell for a new generation of solution process. [0003] However, the thin film based on PbY nanocrystals has a small exciton diff...

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): H01L31/0312H01L31/042
CPCY02E10/50
Inventor 马万里刘泽柯
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap