Broadly tunable emission from Mn-doped zinc gallogermanate phosphors through composition modification

Broadly tunable emission from Mn-doped zinc gallogermanate phosphors through composition modification
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通过成分改性,锰掺杂镓锗酸锌荧光粉的发射可广泛可调

DOI:
10.1364/ome.4.002433
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发表时间:
2014-11
影响因子:
2.8
通讯作者:
Tao, Haizheng
Tao, Haizheng
中科院分区:
材料科学3区
文献类型:
--
作者:
Chen, Chunming;Liu, Zhibin;Kong, Linren;Tao, Haizheng

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目前,单相和全彩色荧光粉越来越受到人们的关注。本文研究了Mn激活的锌镓锗酸盐(Zn 1 + xGa 2 - 2xGexO 4:Mn,x = 0 ~1)的发光特性,发现Ge 4+取代Ga 3+后,其发光范围从绿色到深红色都有很宽的可调范围。绿色和深红色发光归因于Mn 2+和Mn 4+分别占据四面体配位的Zn 2+和八面体配位的Ga 3+位置。讨论了可调谐发光的起源。本发明的磷光体在场发射显示器和活体生物成像中具有潜在的用途。
Nowadays, one-phase and full-color phosphors have gained increasing interest. Here, we show that Mn-activated zinc gallogermanate, Zn1+xGa2-2xGexO4: Mn, x = 0 ~1, phosphors exhibit a broadly tunable luminescence from green to deep red with the substitution of Ga3+ by Ge4+. The green and deep red emissions are attributed to Mn2+ and Mn4+ occupying the tetrahedrally coordinated Zn2+ and octahedrally coordinated Ga3+ sites, respectively. The origin of the tunable luminescence is discussed. The present phosphors have potential uses in field emission displays and in vivo bio-imaging.
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