Semiconductor nanoparticles, dispersion of semiconductor nanoparticles, and optical member

A nanoparticle and semiconductor technology, applied in nano optics, semiconductor devices, nanotechnology, etc., can solve the problems of difficult adjustment of luminescence wavelength, large change of luminescence wavelength, and low quantum efficiency, and achieve small Stokes shift and quantum efficiency The effect of small height and half peak width

Pending Publication Date: 2021-09-28
SHOEI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, InP-based semiconductor nanoparticles based on InP have a lower quantum efficiency than Cd-based semiconductor nanoparticles, and there is a problem that it is difficult to adjust the emission wavelength due to a large change in the emission wavelength due to a change in particle size.

Method used

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  • Semiconductor nanoparticles, dispersion of semiconductor nanoparticles, and optical member
  • Semiconductor nanoparticles, dispersion of semiconductor nanoparticles, and optical member
  • Semiconductor nanoparticles, dispersion of semiconductor nanoparticles, and optical member

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0162]

[0163] Add indium acetate (0.3mmol) and zinc oleate (0.6mmol) to a mixture of oleic acid (0.9mmol), 1-dodecylmercaptan (0.1mmol) and octadecene (10mL), under vacuum (<20Pa) heated to about 120°C and allowed to react for 1 hour. The mixture reacted under vacuum (<20 Pa) was placed at 25° C. under a nitrogen atmosphere, and tris(trimethylsilyl)phosphine (0.25 mmol) was added, then heated to 300° C. and allowed to react for 10 minutes. Further, the reaction liquid was cooled to 25° C., octanoyl chloride (0.45 mmol) was poured, and after heating at 250° C. for 30 minutes, it was cooled to 25° C. to obtain a dispersion solution of core particles.

[0164]

[0165] 40 mmol of zinc oleate and 75 mL of octadecene were mixed, and heated at 110° C. for 1 hour under vacuum to prepare a Zn precursor solution of [Zn]=0.4 M.

[0166] 22 mmol of selenium powder and 10 mL of trioctylphosphine were mixed in nitrogen, stirred until they were all dissolved, and trioctylphosphine se...

experiment example 2

[0181] The tris(trimethylsilyl)phosphine added when preparing the dispersion of the core particles was set to 0.20 mmol, the octanoyl chloride was set to 1.1 mmol, the Zn precursor added when the ZnSe shell was formed was set to 6.0 mL, and tris Octylphosphine selenide was set to 2.0mL, the Zn precursor added when forming the ZnS shell was set to 6.0mL, and trioctylphosphine sulfide was set to 1.8mL, except that, a semiconductor nanometer was prepared in the same manner as in Example 1. particle.

experiment example 3

[0183] The tris(trimethylsilyl)phosphine added when preparing the dispersion of the core particles was set to 0.10 mmol, the octanoyl chloride was set to 0.75 mmol, the Zn precursor added when the ZnSe shell was formed was set to 6.6 mL, and the tris Octylphosphine selenide was set to 2.2mL, the Zn precursor added when forming the ZnS shell was set to 4.0mL, and trioctylphosphine sulfide was set to 1.2mL, and a semiconductor nanometer was produced in the same manner as in Experimental Example 1. particle.

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Abstract

The present invention relates to semiconductor nanoparticles. The semiconductor nanoparticles are core/shell type semiconductor nanoparticles each comprising a core including In and P and one or more shell layers, characterized in that the semiconductor nanoparticles further contain at least Zn, Se, and a halogen and that in the semiconductor nanoparticles, the molar ratios of the P, Zn, Se, and halogen to the In, in terms of atomic amount, are: P, 0.20-0.95; Zn, 11.00-50.00; Se, 7.00-25.00; and halogen, 0.80-15.00. According to the invention, it is possible to provide semiconductor nanoparticles which are core/shell type semiconductor nanoparticles each comprising a core including In and P and a shell comprising Zn and Se as main components and which have a high quantum efficiency, a small half band width, and a small Stokes shift.

Description

technical field [0001] The present invention relates to semiconductor nanoparticles, a dispersion liquid using semiconductor nanoparticles, and an optical member. Background technique [0002] Semiconductor nanoparticles (quantum dots: QDs) having a small particle size are used as wavelength conversion materials for displays. Such semiconductor nanoparticles are minute particles that exhibit a quantum confinement effect, and the width of the band gap changes depending on the size of the nanoparticles. Moreover, excitons formed in semiconductor particles by photoexcitation, charge injection, etc., recombine to emit photons of energy corresponding to the band gap. Therefore, by adjusting the crystal size of semiconductor nanoparticles, the emission wavelength can be controlled, and it is possible to obtain emitted light at the desired wavelength. [0003] As a QD device using semiconductor nanoparticles, there is a method of whitening blue light with a QD film obtained by fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/08C09K11/08C09K11/88B82Y20/00H01L33/50G02B5/20
CPCC09K11/08C09K11/88C01B25/08G02B5/20H01L33/50B82Y20/00
Inventor 森山乔史佐佐木洋和松浦圭佑
Owner SHOEI CHEM IND CO LTD
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