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- W2022635076 abstract "The temperature-dependent lifetime of the green emission from Er3+ ions in 40−50 nm Gd2O3 nanocrystals has been measured and analyzed. The luminescence decay from the 4S3/2 state of Er3+ shows nonexponential characteristics when excited directly to the thermally coupled 2H11/2 from 10 to 300 K, indicating energy transfer to defects in the nanocrystals. The intrinsic lifetime of the 4S3/2 state was determined by utilizing the efficient energy transfer from Gd3+ to Er3+. It is shown that, on the basis of a simplified thermalization model, multiphonon nonradiative relaxation from 4S3/2 to 4F9/2 plays a leading role in the observed temperature dependence of the intrinsic lifetime. Furthermore, a reciprocity method has been successfully extended to the calculation of the room-temperature emission spectrum of the 2H11/2−4I15/2 transition according to the measured excitation spectrum. Unusual phonon side bands in the laser excitation spectrum are observed in the hypersensitive transitions of Er3+. The origin of the phonon side bands is ascribed to the M process that involves the infrared-active lattice modes." @default.
- W2022635076 created "2016-06-24" @default.
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- W2022635076 date "2007-06-15" @default.
- W2022635076 modified "2023-09-27" @default.
- W2022635076 title "Excited-State Dynamics of Er<sup>3+</sup> in Gd<sub>2</sub>O<sub>3</sub> Nanocrystals" @default.
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- W2022635076 doi "https://doi.org/10.1021/jp066223e" @default.
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