Rapid green manufacture of high yield CdTe@Ca(OH)2 nanocrystals and their performance on WLED

Zhixing Zhao; Xiao Qiao Wang; Luting Ling; Cai Feng Wang; Su Chen

doi:10.1002/aic.15133

Rapid green manufacture of high yield CdTe@Ca(OH)₂ nanocrystals and their performance on WLED

Zhixing Zhao, Xiao Qiao Wang, Luting Ling, Cai Feng Wang, Su Chen

College of Chemical Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The bottleneck of large-scale production of semiconductor quantum dots (QDs) is how to solve heavy metal ions waste water and the rapid separation during industrial process. A facile strategy for fabricating CdTe@Ca(OH)₂ nanocrystals exhibiting both improved photoluminescence (PL) stability and prolonged PL lifetime via an economical coprecipitating technology is reported herein. The procedure on capping CdTe QDs into Ca(OH)₂ crystals can enable the products to be easily filtrating separation and the content of residual Cd²⁺ filtrate solution to be reached to 0.238 ppm level. Also, fluorescent rod-like heterocrystals by addition of saturated CaCl₂ solution is constructed. CdTe@Ca(OH)₂ nanocrystals is utilized further as phosphor powders to construct white light emitting diode (WLED). The WLED presented, here, has good photoelectric properties with color rendering index of 82.4 at 350 mA, a color temperature of 4643 k, and Commission Internationale de L'Eclairage coordinate of (0.3548, 0.3532), belonging to the white gamut, showing great potential in industrial application.

Original language	English
Pages (from-to)	580-588
Number of pages	9
Journal	AIChE Journal
Volume	62
Issue number	2
DOIs	https://doi.org/10.1002/aic.15133
State	Published - 1 Feb 2016

Keywords

CdTe@Ca(OH)
Nanocrystal
Photoluminescence stability
Quantum dot
White light emitting diode

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title = "Rapid green manufacture of high yield CdTe@Ca(OH)2 nanocrystals and their performance on WLED",

abstract = "The bottleneck of large-scale production of semiconductor quantum dots (QDs) is how to solve heavy metal ions waste water and the rapid separation during industrial process. A facile strategy for fabricating CdTe@Ca(OH)2 nanocrystals exhibiting both improved photoluminescence (PL) stability and prolonged PL lifetime via an economical coprecipitating technology is reported herein. The procedure on capping CdTe QDs into Ca(OH)2 crystals can enable the products to be easily filtrating separation and the content of residual Cd2+ filtrate solution to be reached to 0.238 ppm level. Also, fluorescent rod-like heterocrystals by addition of saturated CaCl2 solution is constructed. CdTe@Ca(OH)2 nanocrystals is utilized further as phosphor powders to construct white light emitting diode (WLED). The WLED presented, here, has good photoelectric properties with color rendering index of 82.4 at 350 mA, a color temperature of 4643 k, and Commission Internationale de L'Eclairage coordinate of (0.3548, 0.3532), belonging to the white gamut, showing great potential in industrial application.",

keywords = "CdTe@Ca(OH), Nanocrystal, Photoluminescence stability, Quantum dot, White light emitting diode",

author = "Zhixing Zhao and Wang, {Xiao Qiao} and Luting Ling and Wang, {Cai Feng} and Su Chen",

note = "Publisher Copyright: {\textcopyright} 2015 American Institute of Chemical Engineers.",

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AU - Zhao, Zhixing

AU - Wang, Xiao Qiao

AU - Ling, Luting

AU - Wang, Cai Feng

AU - Chen, Su

PY - 2016/2/1

Y1 - 2016/2/1

N2 - The bottleneck of large-scale production of semiconductor quantum dots (QDs) is how to solve heavy metal ions waste water and the rapid separation during industrial process. A facile strategy for fabricating CdTe@Ca(OH)2 nanocrystals exhibiting both improved photoluminescence (PL) stability and prolonged PL lifetime via an economical coprecipitating technology is reported herein. The procedure on capping CdTe QDs into Ca(OH)2 crystals can enable the products to be easily filtrating separation and the content of residual Cd2+ filtrate solution to be reached to 0.238 ppm level. Also, fluorescent rod-like heterocrystals by addition of saturated CaCl2 solution is constructed. CdTe@Ca(OH)2 nanocrystals is utilized further as phosphor powders to construct white light emitting diode (WLED). The WLED presented, here, has good photoelectric properties with color rendering index of 82.4 at 350 mA, a color temperature of 4643 k, and Commission Internationale de L'Eclairage coordinate of (0.3548, 0.3532), belonging to the white gamut, showing great potential in industrial application.

AB - The bottleneck of large-scale production of semiconductor quantum dots (QDs) is how to solve heavy metal ions waste water and the rapid separation during industrial process. A facile strategy for fabricating CdTe@Ca(OH)2 nanocrystals exhibiting both improved photoluminescence (PL) stability and prolonged PL lifetime via an economical coprecipitating technology is reported herein. The procedure on capping CdTe QDs into Ca(OH)2 crystals can enable the products to be easily filtrating separation and the content of residual Cd2+ filtrate solution to be reached to 0.238 ppm level. Also, fluorescent rod-like heterocrystals by addition of saturated CaCl2 solution is constructed. CdTe@Ca(OH)2 nanocrystals is utilized further as phosphor powders to construct white light emitting diode (WLED). The WLED presented, here, has good photoelectric properties with color rendering index of 82.4 at 350 mA, a color temperature of 4643 k, and Commission Internationale de L'Eclairage coordinate of (0.3548, 0.3532), belonging to the white gamut, showing great potential in industrial application.

KW - CdTe@Ca(OH)

KW - Nanocrystal

KW - Photoluminescence stability

KW - Quantum dot

KW - White light emitting diode

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Rapid green manufacture of high yield CdTe@Ca(OH)₂ nanocrystals and their performance on WLED

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