Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes

Ju Yeon Woo; Kyungnam Kim; Sohee Jeong; Chang Soo Han

doi:10.1021/jp206120p

Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes

Ju Yeon Woo, Kyungnam Kim, Sohee Jeong, Chang Soo Han

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

57 Citations (Scopus)

Abstract

This paper reports on the enhanced photoluminescence (PL) of nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr₂SiO₄:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core-multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. It was found that the layered structure is more effective than the mixed one with respect to PL intensity, PL decay, and thermal loss. When this layered nanocomposite (QDs on phosphor) is used to make a white light emitting diode (LED), the brightness is increased by 37%, and the color rendering index (CRI) value is raised to 88.4 compared to the mixed case of 80.4.

Original language	English
Pages (from-to)	20945-20952
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	115
Issue number	43
DOIs	https://doi.org/10.1021/jp206120p
Publication status	Published - 2011 Nov 3

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp206120p

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title = "Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes",

abstract = "This paper reports on the enhanced photoluminescence (PL) of nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr2SiO4:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core-multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. It was found that the layered structure is more effective than the mixed one with respect to PL intensity, PL decay, and thermal loss. When this layered nanocomposite (QDs on phosphor) is used to make a white light emitting diode (LED), the brightness is increased by 37%, and the color rendering index (CRI) value is raised to 88.4 compared to the mixed case of 80.4.",

author = "Woo, {Ju Yeon} and Kyungnam Kim and Sohee Jeong and Han, {Chang Soo}",

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T1 - Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes

AU - Woo, Ju Yeon

AU - Kim, Kyungnam

AU - Jeong, Sohee

AU - Han, Chang Soo

PY - 2011/11/3

Y1 - 2011/11/3

N2 - This paper reports on the enhanced photoluminescence (PL) of nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr2SiO4:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core-multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. It was found that the layered structure is more effective than the mixed one with respect to PL intensity, PL decay, and thermal loss. When this layered nanocomposite (QDs on phosphor) is used to make a white light emitting diode (LED), the brightness is increased by 37%, and the color rendering index (CRI) value is raised to 88.4 compared to the mixed case of 80.4.

AB - This paper reports on the enhanced photoluminescence (PL) of nanocomposites through the layered structuring of phosphor and quantum dot (QD). Green phosphor of Sr2SiO4:Eu, red QDs of CdSe/CdS/CdZnS/ZnS core-multishell, and thermo-curable resin were used for this study. Two kinds of composite (layered and mixed) were prepared, and the schemes for optical energy transfer between QD and phosphor were suggested and investigated based on PL decay characteristics. It was found that the layered structure is more effective than the mixed one with respect to PL intensity, PL decay, and thermal loss. When this layered nanocomposite (QDs on phosphor) is used to make a white light emitting diode (LED), the brightness is increased by 37%, and the color rendering index (CRI) value is raised to 88.4 compared to the mixed case of 80.4.

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Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes

Abstract

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