fractional contributions of defect-originated photoluminescence from cuins2/zns coreshells for hybrid white leds
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ID: 154212
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.
| Reference Key |
rice2014journalfractional
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| Authors | ;Quinton Rice;Sangram Raut;Rahul Chib;Zygmunt Gryczynski;Ignacy Gryczynski;Wenjin Zhang;Xinhua Zhong;Mahmoud Abdel-Fattah;Bagher Tabibi;Jaetae Seo |
| Journal | reproductive biology and endocrinology |
| Year | 2014 |
| DOI |
10.1155/2014/979875
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| URL | |
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