Narrow-Band SrMgAl10O17:Eu2+, Mn2+ Green Phosphors for Wide-Color-Gamut Backlight for LCD Displays
- Title
- Narrow-Band SrMgAl10O17:Eu2+, Mn2+ Green Phosphors for Wide-Color-Gamut Backlight for LCD Displays
- Author
- 임원빈
- Keywords
- HALIDE PEROVSKITES CSPBX3; DOWN-CONVERTED LEDS; QUANTUM-DOTS; WHITE LEDS; THERMAL-STABILITY; ENERGY-TRANSFER; RED PHOSPHOR; EMISSION; BR; CL
- Issue Date
- 2020-08
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v. 5, no. 31, page. 19516-19524
- Abstract
- The strength of the photoluminescence excitation (PLE) spectrum of SrMgAl10O17:Eu2+, Mn2+ (SAM:Eu2+, Mn-2(+)) phosphor increased at deep blue (similar to 430 nm) and red-shifted from violet to deep blue with increasing concentrations of both Eu2+ ions Mn2+ ions. Eu2+-Mn2+ energy transfer between Eu2+ ions in Sr-O layer and Mn2+ ions at Al-O tetrahedral sites was maximized, and the photoluminescence (PL) intensity of the narrow-band Mn2+ emission was improved by optimizing the concentrations of Eu2+ and Mn2+ ions. The PL emission spectrum of the (Sr0.6Eu0.4)(Mg0.4Mn0.6)Al10O17 (SAM:Eu2+, Mn2+) phosphor peaks was optimized at 518 nm at a full width at half-maximum (FWHM) of 26 nm under light-emitting diode (LED) excitation at 432 nm LED. The color gamut area of a color-filtered RGB triangle of down-converted white LEDs (DC-WLEDs) incorporated with optimum SAM:Eu2+, Mn2+ green and K2SiF6:Mn4+ (KSF:Mn4+) red phosphors is enlarged by 114% relative to that of the NTSC standard system in the CIE 1931 color space. The luminous efficacy of our DC-WLED was measured and found to be similar to 92 lm/W at 20 mA, Increased energy transfers between dual activators and red-shifted band-edge and enhanced intensity of PLE spectrum indicate the possibility of developing dual-activated narrow-band green phosphors for wide-color gamut in an LCD backlighting system.
- URI
- https://pubs.acs.org/doi/10.1021/acsomega.0c01798https://repository.hanyang.ac.kr/handle/20.500.11754/170359
- ISSN
- 2470-1343
- DOI
- 10.1021/acsomega.0c01798
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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