论文部分内容阅读
首次报道了射频磁控溅射ＣａＳ∶ＴｍＦ３薄膜的蓝色交流电致发光．电致发光谱包含位于４８０、６５３、７０３和８０３ｎｍ的四组发光峰，分别对应着三价Ｔｍ３＋离子的１Ｇ４→３Ｈ６、１Ｇ４→３Ｈ４、３Ｆ３→３Ｈ６和３Ｆ４→３Ｈ６的电子跃迁发光．通过对ＣａＳ∶ＴｍＦ３粉末的激发光谱的研究，我们发现由于蓝峰和红外峰的激发峰的能量不同导致不同能量的光子激发下的光致发光光谱的红外／蓝峰的强度比有较大的差别．通过对电致发光光谱中红外／蓝峰强度比与不同波长的激发光激发下ＣａＳ∶ＴｍＦ３粉末的光致发光光谱的红外／蓝峰强度比的对比研究，我们判断主要激发过程为从基质到Ｔｍ３＋中心的能量传递．
The first report of RF magnetron sputtering CaS: TmF3 thin film blue AC electroluminescence. The electroluminescence spectrum contains four groups of luminescence peaks at 480, 653, 703 and 803 nm corresponding to the electronic transition emission of 1G4 → 3H6, 1G4 → 3H4, 3F3 → 3H6 and 3F4 → 3H6 of trivalent Tm3 + ions, respectively. By studying the excitation spectra of CaS: TmF3 powder, we found that the intensity ratio of the infrared / blue peak of the photoluminescence spectrum excited by photons of different energies is larger due to the different energy of the excitation peaks of the blue and infrared peaks difference. By contrasting the intensity ratio of infrared to blue light in photoluminescence spectrum of CaS: TmF3 powder excited by excitation light of different wavelengths in the intensity ratio of infrared / blue peak in electroluminescence spectrum, we judge that the main excitation process is from matrix to Tm3 + energy transfer center.