| 학회 | 한국재료학회 |
| 학술대회 | 2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 | 26권 1호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | Luminescence study of stoichiometric LaOF:RE and non-stoichiometric LaO0.65F1.7:RE phosphors |
| 초록 | Phosphors of La(RE)OF and La(RE)O0.65F1.7 (RE=Bi3+, Eu3+, Tb3+) were prepared via a solid-state reaction using La(Bi, Eu)2O3 and NH4F precursors at 950℃ or 1050 °C for two hours [1,2]. X-ray diffraction patterns of the phosphors were obtained permitting the calculation of unit-cell parameters. The two La3+ cation sites in the non-stoichiometric LaO0.65F1.7 structure were studied by monitoring photoluminescence excitation and emission spectra of the La(RE)O0.65F1.7 (RE=Bi3+, Eu3+, Tb3+) phosphors. The energy transfer from Bi3+ to Eu3+ or Tb3+ was observed, its mechanism in the non-stoichiometric LaO0.65F1.7 structure structures is discussed. The desired Commission Internationale de l’Eclairage values, including emissions in blue-green, white, and red wavelength regions, were obtained from the La(RE)O0.65F1.7 (RE=Bi3+, Eu3+, Tb3+) phosphors. References [1] Yang S., Park S., Materials. 13, 2326 (2020). [2] Noh W., Park S., Opt. Mater. 66, 589 (2020). Acknowledgement This research was conducted with the support of the Ministry of Education's University Innovation Support Project. |
| 저자 | 하헌지, 김민석, 김종훈, 박종규, 양성준, 박상문 |
| 소속 | 신라대 |
| 키워드 | X-ray diffraction; phosphors; Bi<SUP>3+</SUP>; Eu<SUP>3+</SUP>; Tb<SUP>3+</SUP> transition; energy transfer |
