| KCaCl3:Ce晶体的生长及发光性能 |
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| 引用本文： | 沈轶明,李嫚,杨晨乐,朱姝俊,潘尚可,潘建国.KCaCl3:Ce晶体的生长及发光性能[J].人工晶体学报,2022,51(1):21-26. |
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| 作者姓名： | 沈轶明 李嫚 杨晨乐 朱姝俊 潘尚可 潘建国 |
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| 作者单位： | 1.宁波大学材料科学与化学工程学院,宁波 315211; 2.浙江省光电探测材料及器件重点实验室,宁波 315211 |
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| 基金项目： | 国家自然科学基金(61775108,61875096)。 |
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| 摘 要： | 采用坩埚下降法生长出不同摩尔分数Ce3+(1%、2%、4%、6%、8%)掺杂的KCaCl3:Ce单晶。晶体属于正交晶系,晶胞参数为a=0.756 0 nm,b=1.048 2 nm,c=0.726 6 nm。热重分析仪测得熔点为740 ℃,透过率测试显示晶体在可见光波段均具有较好光学透过率。对晶体的光致发光光谱、光致衰减时间、X射线激发发射光谱、透过率等光学性能进行了表征。光致发光光谱显示KCaCl3:Ce晶体在358 nm和378 nm波长左右有宽的发射峰,符合Ce3+的5d1→2F5/2和5d1→2F7/2能级跃迁,通过拟合,KCaCl3:Ce晶体的衰减时间在30 ns左右。晶体在X射线激发下均表现出优异的X射线发光性能。
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| 关 键 词： | KCaCl3:Ce 坩埚下降法 闪烁晶体 光致发光 衰减时间 X射线发光 |
| 收稿时间： | 2021-09-29 |
Growth and Luminescent Properties of KCaCl3:Ce Crystals |
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| SHEN Yiming,LI Man,YANG Chenyue,ZHU Shujun,PAN Shangke,PAN Jianguo.Growth and Luminescent Properties of KCaCl3:Ce Crystals[J].Journal of Synthetic Crystals,2022,51(1):21-26. |
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| Authors: | SHEN Yiming LI Man YANG Chenyue ZHU Shujun PAN Shangke PAN Jianguo |
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| Affiliation: | 1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; 2. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo 315211, China |
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| Abstract: | The single crystals of KCaCl3∶Ce doped with different mole fraction of Ce3+ion concentrations(1%,2%,4%,6%,8%)were successfully grown by Bridgman method.The crystals belong to orthorhombic system,the cell parameters have been determined as:a=0.7560 nm,b=1.0482 nm,c=0.7266 nm.The melting point measured by the thermogravimetric analyzer are 740℃.The photoluminescence spectrum,decay time,X-ray excitation emission spectrum and optical transmittance were characterized.The transmittance shows it has good optical transmittance in visible band.The photoluminescence spectra of KCaCl3∶Ce exhibit the two broad emission peaks locate at 358 nm and 378 nm,corresponding to Ce3+5d1→2F5/2 and 5d1→2F7/2 energy level transition;the scintillating decay time of the KCaCl3∶Ce is about 30 ns under ultraviolet excitation.Moreover,all crystals exhibit excellent X-ray liminescence properties under X-ray excitation. |
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| Keywords: | KCaCl3∶Ce Bridgman method scintillation crystal photoluminescence decay time X-ray luminescence |
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