Luminescence and up-conversion of single crystalline Lu3Al5O12:Pr3+

This work deals with the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet (LuAG:Pr3+). A special focus was set on temperature- and time-dependent spectroscopy. Beyond the wellknown down-conversion luminescence of LuAG:Pr3+, also UV-A/B up-conversion luminescence under excitation with a 488 nm laser was thoroughly investigated. Furthermore, the results of the spectroscopic investigations on the single crystalline material were supplemented and compared with measurements on a microscale powder sample. In addition, to the spectroscopic investigations, mechanistic considerations are presented to obtain a closer look at the up-conversion process in LuAG:Pr3+. We promote the thesis of a temperature-dependent energy transfer up-conversion mechanism.

Automated summary

This work explores the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet, focusing on temperature- and time-dependent spectroscopy. It discovered UV-A/B up-conversion luminescence and proposed a temperature-dependent energy transfer up-conversion mechanism.