Bright three-band white light generated from CdSe/ZnSe quantum dot-assisted Sr{sub 3}SiO{sub 5}:Ce{sup 3+},Li{sup +}-based white light-emitting diode with high color rendering index

Journal Article · Mon Oct 19 00:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3246800· OSTI ID:21308712

Jang, Ho Seong; Kwon, Byoung-Hwa; Jeon, Duk Young ^[1]; Yang, Heesun ^[2]

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1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)
2. Department of Materials Science and Engineering, Hongik University, 72-1, Sangsu-dong, Mapo-gu, Seoul 121-791 (Korea, Republic of)

In this study, bright three-band white light was generated from the CdSe/ZnSe quantum dot (QD)-assisted Sr{sub 3}SiO{sub 5}:Ce{sup 3+},Li{sup +}-based white light-emitting diode (WLED). The CdSe/ZnSe core/shell structure was confirmed by energy dispersive x-ray spectroscopy and x-ray photoelectron spectroscopy. The CdSe/ZnSe QDs showed high quantum efficiency (79%) and contributed to the high luminous efficiency ({eta}{sub L}) of the fabricated WLED. The WLED showed bright natural white with excellent color rendering property ({eta}{sub L}=26.8 lm/W, color temperature=6140 K, and color rendering index=85) and high stability against the increase in forward bias currents from 20 to 70 mA.

• OSTI ID: 21308712
• Journal Information: Applied Physics Letters, Vol. 95, Issue 16; Other Information: DOI: 10.1063/1.3246800; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CADMIUM SELENIDES
CERIUM IONS
CHEMICAL ANALYSIS
COLOR
LIGHT EMITTING DIODES
LITHIUM IONS
QUANTUM DOTS
QUANTUM EFFICIENCY
SEMICONDUCTOR MATERIALS
STRONTIUM SILICATES
VISIBLE RADIATION
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY
ZINC SELENIDES