Jong Heo
Pohang University of Science and Technology · 材料科学
研究室紹介
Professor Jong Heo's research lab specializes in advanced functional materials, with a focus on chalcogenide and rare-earth-doped glasses for optical and optoelectronic applications. The lab investigates structural and optical properties of tellurite and silicate glasses, exploring their use in fiber optics, solid-state lighting, and radiation-resistant waste forms. Key research directions include quantum dot-doped glasses for tunable photoluminescence and saturable absorbers, as well as novel cementitious materials for nuclear waste immobilization.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
15An infrared-transmitting chalcogenide fiber was used as an optical probe to analyze qualitatively and quantitatively various chemical substances in aqueous solutions. An unclad fiber with 380-microm diameter was combined with a Fourier transform infrared spectrometer to monitor the concentration of the analytes in solutions by measuring the changes in the absorbance of their fundamental vibration peaks. A linear relationship was observed between the absorption by the vanescent field and concentr
Structural development of tellurite glasses with the addition of Li 2 O and Na 2 O has been studied using infrared, Raman, and X‐ray photoelectron spectroscopies. The increase in intensity of the peak at 755 cm −1 in the infrared spectra as compared to the peak at 620 cm −1 suggests the transformation of TeO 4 building units to TeO 3 pyramids with the addition of alkali oxide. Proposed structural change is further supported by the strong compositional dependence of the 755‐cm −1 peak in the Rama
A phosphor-in-glass (PiG) with red and green phosphors using Nd-doped glass as a host matrix was fabricated to produce a white light emitting diode (wLED) with a wide color gamut. The Lu<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> and CaAlSiN<sub>3</sub>:Eu<sup>2+</sup> contents were adjusted to achieve white emission for liquid crystal display (LCD) applications. The silicate glass was doped with varying concentrations of Nd<sub>2</sub>O<sub>3</sub> to modify the photoluminescence s
This paper evaluates the efficacy of magnesium potassium phosphate cements (MKPCs) as waste forms for the solidification of radioactive concrete powder wastes produced by the decommissioning of nuclear power plants. MKPC specimens that contained up to 50 wt% of simulated concrete powder wastes (SCPWs) were evaluated. We measured the porosity and compressive strength of the MKPC specimens, observing them using scanning electron microscopy and X-ray diffraction. The addition of SCPWs reduced the p