Yongbin Hua
경희대학교 Materials Science · 재료과학
Yongbin Hua 교수의 연구실은 주로 희토류 원소 도핑을 통한 퍼보스카이트 및 이중 퍼보스카이트 계 광물질의 합성과 광학적 특성 분석을 중심으로 연구를 진행하고 있습니다. 특히 녹색, 오ран지-빨간색, 적색 발광을 나타내는 이종 광물질을 설계하여 고효율 LED용 phosphor 및 온도 센서로의 응용 가능성을 탐색하고 있습니다. 연구는 광학적 성능, 열 안정성, 양자 효율 향상에 초점을 맞추고 있으며, 식물 성장에 적합한 빛을 내는 심층적 적색 발광 재료 개발도 함께 진행되고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this work, novel green-emitting La2MgTiO6:Er3+ (LMTO:Er3+) phosphors were successfully synthesized. The phase structure, electronic structure, morphology, luminescence behaviors, and other optical characteristics were investigated in detail. Besides, the optical sensing properties of the thermal-coupled levels (2H11/2, 4S3/2) were investigated based on the fluorescence intensity ratio principle, and the maximum absolute and relative sensing sensitivities were found to be as high as 0.963% and
Novel rare-earth (RE; e.g., europium (Eu<sup>3+</sup>), samarium (Sm<sup>3+</sup>), and praseodymium (Pr<sup>3+</sup>)) and transition metal (TM<sup>4+</sup>; e.g., manganese (Mn<sup>4+</sup>)) ion single-/co-doped double-perovskite Ca<sub>2</sub>InTaO<sub>6</sub> (CITO) phosphors were prepared and investigated with respect to their crystal structure and photoluminescence (PL) properties. Among them, the CITO:Eu<sup>3+</sup> phosphors were found to exhibit an ultra-high internal PL quantum yield
At present, rare-earth-activated perovskite-type materials have attracted lots of interest from researchers owing to their excellent advantages of unique electron properties and stable structure. This present work was designed to synthesize, investigate, and compare the photoluminescence properties in europium(III) (Eu3+)-activated Ca2BB′O6 (B = Y, Gd, and La; B′ = Sb and Nb) double-perovskite (A2BB′O6) luminescent materials. The doped Eu3+ ions substitute the B sites of Y3+, Gd3+, and La3+ ions
Abstract Different luminescent behaviors of La 3 NbO 7 :Sm 3+ phosphors under the excitations of charge transfer band (CTB, 250 nm) and featured absorption peak ( 6 H 5/2 → 4 H 7/2 , 405 nm) of Sm 3+ ions were demonstrated. Under the excitation wavelength of 405 nm, the optimal La 3 NbO 7 :0.1Sm 3+ phosphor exhibited an orange‐red emission while the chromatic coordinate was found to be (0.609, 0.387), which also showed the excellent thermal performance, exhibiting its emission intensity of about
The Sm<sup>3+</sup> and Tb<sup>3+</sup> ion-doped NaLa(MoO<sub>4</sub>)<sub>2</sub> can be used for optical temperature sensors, safety signs, and warm WLEDs.
