NaYF4: Yb,Er—an efficient upconversion phosphor
作者:
N. Menyuk,
K. Dwight,
J.W. Pierce,
期刊:
Applied Physics Letters
(AIP Available online 1972)
卷期:
Volume 21,
issue 4
页码: 159-161
ISSN:0003-6951
年代: 1972
DOI:10.1063/1.1654325
出版商: AIP
数据来源: AIP
摘要:
Studies of the infrared‐pumped visible luminescence of NaYF4: Yb, Er show it to have at least twice the visible output of YF3: Yb, Er when pumped with a narrow‐band excitation source at the optimum frequency. It is also free from saturation effects until very intense excitation levels are reached. The mechanism for red upconversion appears to change with increasing excitation from a two‐step process to one involving a significant amount of three‐step upconversion, which change is accompanied by an increase in the response time for visible emissions.
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