Insights into Li+-induced morphology evolution and upconversion luminescence enhancement of KSc2F7:Yb/Er nanocrystals
Insights into Li+-induced morphology evolution and upconversion luminescence enhancement of KSc2F7:Yb/Er nanocrystals
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DOI：
10.1039/c7tc00649g
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发表时间：
2017-04
影响因子：
6.4
通讯作者：
Yangbo Wang;Tian Wei;Xingwen Cheng;Hui Ma;Yue Pan;Juan Xie;Haiquan Su;Xiaoji Xie;Ling Huang;Wei Huang
中科院分区：
文献类型：
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作者：
Yangbo Wang;Tian Wei;Xingwen Cheng;Hui Ma;Yue Pan;Juan Xie;Haiquan Su;Xiaoji Xie;Ling Huang;Wei Huang
镧系元素掺杂的KRE_2F_7（RE：稀土）纳米晶体由于其独特的晶体结构和可定制的上转换发光而成为一种新型的上转换基质材料。然而，控制合成和上转换微调通过主机晶格操纵还没有得到很好的探索。本文通过Li+掺杂，系统地研究了KSc_2F_7：Yb/Er纳米晶的形貌和上转换发光演化。结果表明，掺杂镧系元素后，由于Li+诱导的局域晶场变化，发光增强了约21倍，红/绿色比达到约22倍。对Li+诱导的KSc 2F 7：Yb/Er双掺杂操作的理解为通过高含量杂质掺杂改善功能性铺平了新的途径，这将激发对双掺杂工程，特别是发光纳米晶体的更广泛的探索。
Lanthanide doped KRE2F7 (RE: rare earth) nanocrystals have recently emerged as a new type of upconversion host material due to their distinct crystal structure and tailorable upconversion emissions. However, the controlled synthesis and upconversion fine-tuning through host lattice manipulation have not been well explored. Herein, via Li+ doping, we have systematically studied the morphology and upconversion luminescence evolution of KSc2F7:Yb/Er nanocrystals. An ∼21 times luminescence enhancement and a red to green ratio of ∼22 were obtained, which was caused by Li+ induced local crystal field variation around the doped lanthanide ions. The understanding of Li+-induced KSc2F7:Yb/Er nanocrystal manipulation has paved a new avenue for functionality improvement via high content impurity doping, which should inspire even wider exploration of nanocrystal engineering, especially luminescent nanocrystals.