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Characteristics of CuInS2/ZnS quantum dots and its application on LED
- Source :
-
Journal of Crystal Growth . Jul2011, Vol. 326 Issue 1, p90-93. 4p. - Publication Year :
- 2011
-
Abstract
- Abstract: In this research, CuInS2 quantum dots (QDs) have been studied as an excellent red emitting source for white LED because of its non-toxic deep red emission, and large Stokes shift properties. The CuInS2 QDs are synthesized by the one-pot method, which is a candidate for the mass-production method. In addition, formation of ZnS shells on QD surfaces has been conducted in order to reduce non-radiative recombination on its surface defects. The photoluminescence (PL) characteristics of core/shell quantum dot show that the maximum PL wavelength blue-shifts by about 80nm on increasing its intensity more than 6 times. Quantum yield (QY) of the CuInS2/ZnS QDs shows about 67% as the maximum value. The dispersion of the quantum dots in polystyrene, which is hydrophobic and transparent, was also conducted using co-dispersing toluene. Finally, the polystyrene/quantum dot composite was applied on blue LEDs and it showed luminous efficacy of 10.7lm/W and (0.4338, 0.1827) CIE coordinates. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00220248
- Volume :
- 326
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Crystal Growth
- Publication Type :
- Academic Journal
- Accession number :
- 62557817
- Full Text :
- https://doi.org/10.1016/j.jcrysgro.2011.01.059