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PbTe/CdTe double quantum dot codoping borosilicate glass and preparation technology thereof

A borosilicate glass, double quantum dot technology, applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problem of photoelectric conversion rate to be further improved, narrow photoluminescence spectral range, low spectral coverage, etc. problem, to achieve good optical properties, reduce softening point, reduce the effect of light reflectivity

Active Publication Date: 2019-01-11
苏州融睿电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, quantum dot-doped glass has a low emission spectrum coverage and cannot absorb all visible and mid-infrared bands of sunlight. The photoluminescence spectrum range is narrow, and the photoelectric conversion rate needs to be further improved.

Method used

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  • PbTe/CdTe double quantum dot codoping borosilicate glass and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A PbTe / CdTe double quantum dot co-doped borosilicate glass, including the following mole percentage raw materials: SiO 2 45%, B 2 o 3 12%, Na 2 O 8%, Al 2 o 3 3%, ZnTe 9%, PbO 2.4%, CdO 2%, CaO 9%, ZnO6%, SrF 2 2%, Mg 2 B 2 o 5 0.6%, La 2 o 3 +Pr 2 o 3 +Nb 2 o 5 1%; among them, La 2 o 3 、Pr 2 o 3 with Nb 2 o 5 The molar ratio is 2:1.5:1.

[0019] The above-mentioned preparation process of PbTe / CdTe double quantum dot co-doped borosilicate glass comprises the following steps:

[0020] S1: Mix glass raw materials according to mole percentage, heat up to 1250°C under nitrogen, keep warm and melt for 1 hour to obtain glass melt;

[0021] S2: When the glass melt drops to 1000°C, it is cast onto a graphite mold for molding, and then annealed at 550°C for 3 hours;

[0022] S3: After heating the annealed glass at a constant temperature of 550°C for 1 hour, the temperature was raised to 700°C at a rate of 3°C / min, kept for 1 hour, then raised to 820°C ...

Embodiment 2

[0024] A PbTe / CdTe double quantum dot co-doped borosilicate glass, including the following mole percentage raw materials: SiO 2 60%, B 2 o 3 9%, Na 2 O 6%, Al 2 o 3 1.5%, ZnTe 5.8%, PbO 1.8%, CdO 1.5%, CaO 7%, ZnO 5%, SrF 2 1.5%, Mg 2 B 2 o 5 0.3%, La 2 o 3 +Pr 2 o 3 +Nb 2 o 5 0.6%; of which, La 2 o 3 、Pr 2 o 3 with Nb 2 o 5 The molar ratio is 2.5:1.7:1.

[0025] Preparation technology is with embodiment 1, difference is:

[0026] S1: The melting temperature is 1300°C;

[0027]S2: The casting temperature is 1100°C, and the annealing temperature is 550°C;

[0028] S3: Heat treatment process: After heating the glass at constant temperature for 1.5 hours at 575°C, the temperature was raised to 725°C at a rate of 4°C / min, kept for 3 hours, then raised to 860°C at a rate of 12°C / min, kept for 2 hours, and then heated at a rate of 18°C / min. The temperature was lowered to 575°C at a rate of 9°C / min, and finally to room temperature at a rate of 9°C / min.

Embodiment 3

[0030] A PbTe / CdTe double quantum dot co-doped borosilicate glass, including the following mole percentage raw materials: SiO 2 75%, B 2 o 3 6%%, Na 2 O 4%, Al 2 o 3 0.1%, ZnTe 2.5%, PbO 1.2%, CdO 1%, CaO 5%, ZnO 4%, SrF 2 1%, Mg 2 B 2 o 5 0.1%, La 2 o 3 +Pr 2 o 3 +Nb 2 o 5 0.1%; among them, La 2 o 3 、Pr 2 o 3 with Nb 2 o 5 The molar ratio is 6:1.6:1.

[0031] Preparation technology is with embodiment 1, difference is:

[0032] S1: The melting temperature is 1350°C;

[0033] S2: The casting temperature is 1200°C, and the annealing temperature is 570°C;

[0034] S3: Heat treatment process: After heating the glass at a constant temperature of 600°C for 2 hours, the temperature was raised to 750°C at a rate of 5°C / min, kept for 5 hours, then raised to 900°C at a rate of 15°C / min, kept for 1-3 hours, and then heated at a rate of 20°C / min The temperature was lowered to 600°C, and finally to room temperature at a rate of 10°C / min.

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Abstract

The invention discloses a PbTe / CdTe double quantum dot codoping borosilicate glass and a preparation technology thereof. The PbTe / CdTe double quantum dot codoping borosilicate glass comprises the following raw materials by mole percent: 45-75% of SiO2, 6-12% of B2O3, 4-8% of Na2O, 0.1-3% of Al2O3, 2.5-9% of ZnTe, 1.2-2.4% of PbO, 1-2% of CdO, 5-9% of CaO, 4-6% of ZnO, 1-2% of SrF2, 0.1-0.6% of Mg2B2O5 and 0.1-1% of La2O3+Pr2O3+Nb2O5. According to the invention, a melting method is adopted for doping PbTe quantum dot and CdTe quantum dot into a borosilicate glass system, so as to realize complete coverage for visible light and near / mid-infrared rays; the spectral response range is within 500-2100nm; different thermal treatment processes are adopted for regulating the growth size and growthrate of quantum dot.

Description

technical field [0001] The invention relates to the technical field of glass manufacturing, in particular to a PbTe / CdTe double quantum dot co-doped borosilicate glass and a preparation process thereof. Background technique [0002] Borosilicate glass, also known as borosilicate glass, has excellent thermal stability, chemical stability, mechanical properties, process properties and optical properties. Compared with ordinary glass, the content of alkali metal oxide in borosilicate glass is lower, the content of boron oxide is higher, and the basic component includes 70%-80% SiO 2 ,6%-15%B 2 o 3 , 4%-10%Na 2 O, where Na 2 O is for B 2 o 3 Oxygen vacancies in the lattice provide free oxygen, making [BO 3 ]’s layered triangular units are orderly connected by sharing oxygen atoms into [BO 4 ] frame-like tetrahedron structure, [BO 4 ] and [SiO 4 ] is further structured into a complete network structure, which is B 2 o 3 with SiO 2 Co-thermal synthesis of uniform and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C14/00C03B19/02C03B25/00
CPCC03B19/02C03B25/00C03C14/006C03C2214/16
Inventor 朱世新杨雍
Owner 苏州融睿电子科技有限公司
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