Browsing by Author "Diau, Wei-Guang"

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Interface Engineering with a Hole-Transporting SAM for Organic
(2010)
Lin, Chia-Lin
;
Hsieh, Wei-Szu
;
Chang, Yu-Cheng
;
Chang, Shu-Mei
;
Diau, Wei-Guang
A series of organic compounds based on triphenylamine were designed with two substitute groups and a carboxyl group, which was connected to TiO2 surface by self-assembled monolayers (SAMs). The modified TiO2 was applied in organic electronics and measured the optical properties to confirm the characteristic of light-harvesting.
Investigation of Pr(3+) as a sensitizer in quantum-cutting fluoride phosphors
(2008-02-25)
Lee, Te-Ju
;
Luo, Li-Yang
;
Cheng, Bing-Ming
;
Diau, Wei-Guang
;
Chen, Teng-Ming
A quantum-cutting (QC) phosphor K(2)GdF(5):Eu(3+) shows poor optical absorption and a theoretical quantum efficiency (QE) of 107% in the ultraviolet (UV) and vacuum ultraviolet (VUV) excitation spectral ranges. Pr(3+) was codoped as a sensitizer in K(2)GdF(5): Eu(3+) thus increasing the absorption in the UV and VUV spectral regions; the theoretical QE of K(2)GdF(5): Eu(3+), Pr(3+) was increased to 138%. The spectra indicate that the possible mechanisms of QC and energy transfer differ from those of phosphors containing the Gd(3+) -Eu(3+) couple. Temporally resolved measurements of fluorescence decay confirm the proposed QC mechanism for the phosphor containing the Gd(3+) -Eu(3+),Pr(3+) system. (C) 2008 American Institute of Physics.