OPTICAL-PROPERTIES OF MANGANESE-DOPED NANOCRYSTALS OF ZNS
OPTICAL-PROPERTIES OF MANGANESE-DOPED NANOCRYSTALS OF ZNS
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DOI：
10.1103/physrevlett.72.416
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发表时间：
1994-01-17
影响因子：
8.6
通讯作者：
NURMIKKO, A
中科院分区：
文献类型：
--
作者：
BHARGAVA, RN;GALLAGHER, D;NURMIKKO, A
我们首次报道了掺杂的半导体纳米晶可以同时产生高的发光效率和寿命缩短。采用室温化学法制备了尺寸为3.5~7.5 nm的掺锰硫化锌纳米晶，其外发光量子效率为18%，发光衰减比相应的体相Mn2+跃迁至少快5个数量级。量子效率随粒子尺寸的减小而增大。这些结果表明，掺杂纳米晶确实是一类迄今未知的新材料。
We report for the first time that doped nanocrystals of semiconductor can yield both high luminescent efficiencies and lifetime shortening at the same time. Nanocrystals of Mn-doped ZnS with sizes varying from 3.5 to 7.5 nm were prepared by a room temperature chemical process yielding an external photoluminescent quantum efficiency 18% and a luminescent decay at least 5 orders of magnitude faster than the corresponding Mn2+ transition in the bulk crystals. The quantum efficiency increases with decreasing size of the particles. These results suggest that doped nanocrystals are indeed a new class of materials heretofore unknown.