Effect of Zn²⁺ dopant on photon avalanche upconversion behavior of BiOCl:Er³⁺ crystals

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• 作者：Qun LIU ((鍒?缇?)^a ; Yongjin LI ((鏉庢案杩?)^b ; Zhiguo SONG ((瀹嬪織鍥?)^a ; ^{songzg@kmust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Ronghua WAN ((涓囪崳鍗?)^a ; Yuting ZHOU ((鍛ㄧ帀濠?)^a ; Jianbei QIU ((閭卞缓澶?)^a ; Zhengwen YANG ((鏉ㄦ鏂?)^a ; Zhaoyi YIN ((灏瑰厗鐩?)^a
• 关键词：BiOCl ; Er3+ crystal ; Zn2+ doped ; upconversion ; photon avalanche ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：33
• 期：10
• 页码：1098-1103
• 全文大小：1027 K

文摘

Effect of divalent dopants, Zn²⁺ ion, on the high-order photon avalanche (PA) upconversion (UC) emission of Er³⁺ doped BiOCl microcrystals was investigated. XRD results indicated that Zn²⁺ ion dopants would mostly enter into the lattice space at low and moderate doping concentration, and began to substitute Bi³⁺ ion gradually at heavily doping level. Under exaction at 980 nm, the PA UC of violet, green and red emission of Er³⁺ ions could be observed, and the UC emission intensity increased with increasing the Zn²⁺ addition below 8 mol.%, then decreased with further addition. Power dependence study showed that the dopant concentration of Zn²⁺ had no obviously negative effect on the occurrence of PA emission. On the bases of results investigated herein, we considered that the lattice distortion by Zn²⁺ doping could not directly change the special PA emission of BiOCl:Er³⁺, but would improve the emission intensity when used as lattice modifier.