@article {Cao:2011:1533-4880:9899,
title = "Optical High Temperature Sensor Based on Enhanced Green Upconversion Emissions in Er3+Yb3+Li+ Codoped TiO2 Powders",
journal = "Journal of Nanoscience and Nanotechnology",
parent_itemid = "infobike://asp/jnn",
publishercode ="asp",
year = "2011",
volume = "11",
number = "11",
publication date ="2011-11-01T00:00:00",
pages = "9899-9903",
itemtype = "ARTICLE",
issn = "1533-4880",
eissn = "1533-4899",
url = "https://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000011/art00104",
doi = "doi:10.1166/jnn.2011.5236",
keyword = "LI+ CODOPING, GREEN UPCONVERSION EMISSION, ER3+-YB3+ CODOPED TIO2, OPTICAL TEMPERATURE SENSOR",
author = "Cao, B. S. and He, Y. Y. and Sun, Y. and Song, M. and Dong, B.",
abstract = "The Er3+Yb3+Li+ codoped TiO2 powders have been prepared by solgel method. The strong enhancement of green and red upconversion emissions were obtained for Er3+Yb3+ codoped TiO2 by
additional Li+ codoping and investigated using 976 nm semiconductor laser diode excitation. The enhanced upconversion emissions by the addition of Li+ resulted from the formation of Li compound with lower crystal field symmetry. The fluorescence intensity ratio (FIR)
of green upconversion emissions from the transitions of 2H11/2 4I15/2 and 4S3/2 4I15/2 of Er3+ in the Er3+Yb3+Li+ codoped TiO2
has been studied as a function of temperature in the range of 300925 K, and the maximum sensitivity was determined to be 0.0025 K1. Er3+Yb3+Li+ codoped TiO2 material with the highest operating temperature up
to 925 K, has higher temperature sensitivity and fluorescence efficiency being a promising candidate for applications in optical high temperature sensor.",
}