Fractional contributions of defect-originated photoluminescence from CuInS2/ZnS coreshells for hybrid white LEDs

Quinton Rice, Sangram Limbaji Raut, Rahul Chib, Zygmunt Gryczynski, Ignacy Gryczynski, Wenjin Zhang, Xinhua Zhong, Mahmoud Abdel-Fattah, Bagher Tabibi, Jaetae Seo

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

The wide optical tunability and broad spectral distribution of CuInS2/ZnS (CIS/ZnS) coreshells are key elements for developing the hybrid white light emitting diodes where the nanoparticles are stacked on the blue LEDs. Two CIS/ZnS555 nm and CIS/ZnS665 nm coreshells are utilized for the hybrid white LED development. The time-resolved spectroscopy of CIS/ZnS555 nm and CIS/ZnS665 nm reveals the correlation between the fast, intermediate, and slow decay components and the interface-trapped state and shallow- and deep-trapped states, although the fractional amplitudes of photoluminescence (PL) decay components are widely distributed throughout the entire spectra. The temperature-resolved spectroscopy explains that the PL from deep-trapped donor-acceptor (DA) state has relatively large thermal quenching, due to the relative Coulomb interaction of DA pairs, compared to the thermal quenching of PL from interface defect state and shallow-trapped DA state. A good spectral coupling between the blue diode excitation and the PL from CIS/ZnS leads to the realization of hybrid white LEDs.

Original languageEnglish
Article number979875
JournalJournal of Nanomaterials
Volume2014
DOIs
StatePublished - 1 Jan 2014

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Light emitting diodes
Photoluminescence
Defects
Quenching
Spectroscopy
Coulomb interactions
Diodes
Nanoparticles
Temperature
Hot Temperature

Cite this

Rice, Quinton ; Raut, Sangram Limbaji ; Chib, Rahul ; Gryczynski, Zygmunt ; Gryczynski, Ignacy ; Zhang, Wenjin ; Zhong, Xinhua ; Abdel-Fattah, Mahmoud ; Tabibi, Bagher ; Seo, Jaetae. / Fractional contributions of defect-originated photoluminescence from CuInS2/ZnS coreshells for hybrid white LEDs. In: Journal of Nanomaterials. 2014 ; Vol. 2014.
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abstract = "The wide optical tunability and broad spectral distribution of CuInS2/ZnS (CIS/ZnS) coreshells are key elements for developing the hybrid white light emitting diodes where the nanoparticles are stacked on the blue LEDs. Two CIS/ZnS555 nm and CIS/ZnS665 nm coreshells are utilized for the hybrid white LED development. The time-resolved spectroscopy of CIS/ZnS555 nm and CIS/ZnS665 nm reveals the correlation between the fast, intermediate, and slow decay components and the interface-trapped state and shallow- and deep-trapped states, although the fractional amplitudes of photoluminescence (PL) decay components are widely distributed throughout the entire spectra. The temperature-resolved spectroscopy explains that the PL from deep-trapped donor-acceptor (DA) state has relatively large thermal quenching, due to the relative Coulomb interaction of DA pairs, compared to the thermal quenching of PL from interface defect state and shallow-trapped DA state. A good spectral coupling between the blue diode excitation and the PL from CIS/ZnS leads to the realization of hybrid white LEDs.",
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Fractional contributions of defect-originated photoluminescence from CuInS2/ZnS coreshells for hybrid white LEDs. / Rice, Quinton; Raut, Sangram Limbaji; Chib, Rahul; Gryczynski, Zygmunt; Gryczynski, Ignacy; Zhang, Wenjin; Zhong, Xinhua; Abdel-Fattah, Mahmoud; Tabibi, Bagher; Seo, Jaetae.

In: Journal of Nanomaterials, Vol. 2014, 979875, 01.01.2014.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Gryczynski, Zygmunt

AU - Gryczynski, Ignacy

AU - Zhang, Wenjin

AU - Zhong, Xinhua

AU - Abdel-Fattah, Mahmoud

AU - Tabibi, Bagher

AU - Seo, Jaetae

PY - 2014/1/1

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