| 조합화학과 QSAR를 이용한 SrO-B2O3-P2O5 3원계 청색형광체 개발 |
| 유정곤, 백종호, 조상호, 손기선 |
| 순천대학교 신소재공학부 |
| Screening of SrO-B2O3-P2O5 Ternary System by Combinatorial Chemistry and QSAR |
| Jeong-Gon Yoo, Jong-Ho Back, Sang-Ho Cho, Kee-Sun Sohn |
| Department of Materials Science and Metallurgical Engineering, Sunchon National University |
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| ABSTRACT |
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It is known that $BaMgAl_{10}O_{17}:Eu^{2+}(BAM)$ phosphors currently used have a serious thermal degradation problem. We screened $SrO-B_2O_3-P_2O_5$ system by a solution combinatorial chemistry technique in an attempt to search for a thermally stable blue phosphor for PDPs. A Quantitative Structure Activity Relationship (QSAR) was also obtained using an artificial neural network trained by the result fiom the combinatorial screening. As a result, we proposed a promising composition range in the $SrO-B_2O_3-P_2O_5$ ternary library. These compositions crystallized into a single major phase, $Sr_6BP_5O_{20}:Eu^{2+}$. The structure of $Sr_6BP_5O_{20}:Eu^{2+}$ was clearly determined by ab initio calculation. The luminescent efficiency of $Sr_6BP_5O_{20}:Eu^{2+}$ was 2.8 times of BAM at Vacuum Ultra Violet (VUV) excitation. The thermal stability was also good but the CIE color chromaticity was slightly poor. |
| Key words:
PDP, Phosphor, Combinatorial chemistry, QSAR |
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