Solvothermal Preparation of Yellow-Emitting CuInS2/ZnS Quantum Dots and Their Application to White Light-Emitting Diodes
- Authors
- Song, Woo-Seuk; Yang, Heesun
- Issue Date
- Sep-2013
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Solvothermal; CuInS2/ZnS; Quantum Dots; White Light-Emitting Diode
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.9, pp.6459 - 6462
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 13
- Number
- 9
- Start Page
- 6459
- End Page
- 6462
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/17057
- DOI
- 10.1166/jnn.2013.7630
- ISSN
- 1533-4880
- Abstract
- Based on the development of highly fluorescent colloidal quantum dots (QDs), their successful applications for the fabrication of lighting sources such as light-emitting diodes (LEDs) and lasing devices have been demonstrated. Here, CuInS2/ZnS core/shell QDs are facilely prepared by a two-step solvothermal route. Depending on the amount of a shell precursor of Zn stearate, fluorescent properties such as emission color and quantum yield (QY) of CuInS2/ZnS QDs are tunable and optimized. Yellow-emitting CuInS2/ZnS QD with a peak wavelength of 562 nm, QY of 81%, and emission bandwidth of 114 nm is chosen as an efficient blue-to-yellow downconverter for the fabrication of QD-based white LED (WLED). Various electroluminescent properties including luminous efficacy and color rendering index of QD-WLED are measured as a function of forward current up to 100 mA and described in details.
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