摘要
用离子交换工艺对提拉法生长的Na^+-β氧化铝进行处理得到的Cu^+掺杂β氧化铝在紫外光激发下孤立Cu^+和[Cu^+-Cu^+]二聚物的发射光谱。在双掺情况下,伴随Cu^+掺入的阳离子(K^+,Ag^+)提高了孤立Cu^+对[Cu^+-Cu^+]发射强度的比率,发射带峰位也略有偏移。在Cu^+/K^+掺杂样品中新发现一个很强的395nm的荧光峰。文章提供了单掺和双掺Cu^+-β氧化铝的吸收、发射和激发谱数据并对各荧光发射带的机制进行了讨论。
Cu+-doped */*-alumina were prepered by standard ion exchange techniques with single crystals of Na+**-alumina which were grown by Czochralski techniques. In the Na+ isomorph, under uv excitation, emission is come from isolated Cu+ ions and from [Cu+-Cu+] dimers. When the Na+ ions in the crystal are replaced by other cations (K+,Ag+) to form co-doped *0* aluminas, the Cu+-to-[Cu+-Cu+] radiation ratio will be rise and the peaks of emissions will shift a little. In a Cu+/K+ doped sample we found a very strong emission line at 395nm. The data of absorbtion, emission and excitation spectrum have been provided and the mechanism for bands of emissions have discussed
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第6期1003-1008,共6页
Acta Physica Sinica
