Enhanced, shortened and tunable emission in Eu

Yang Wang, Ilaria Di Sarcina, Alessia Cemmi, Stefania Baccaro, Guorong Chen

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Abstract

A series of Cu+/Eu3+co-doped borosilicate glasses have been successfully prepared by melt-quenching method. As proved by transmission spectra, the copper ions are univalent in the investigated borosilicate glasses. Under ultraviolet (UV) excitation at 325 nm, the emission intensity of Eu3+increased by nearly double due to a large overlapping between the Cu+and Eu3+emission peaks. The decreased excitation intensity in UV region and shortened emission lifetime of Cu+in association with presence of Eu3+ions consistently suggest an energy transfer process from Cu+to Eu3+ions. On the other hand, the partially allowed transition of Cu+makes contribution to the red emission of Eu3+at 611 nm in Cu+/Eu3+co-doped samples, thus shortening the lifetime from the conventional millisecond (∼1.86 ms) to the microsecond (up to around 37 μs) regime. Besides, tunable light is realized by combining the blue-green emission from Cu+ions with the orange-red one from Eu3+ions. The light can be continuously tuned by changing the Cu+/Eu3+concentration ratio, indicating that the present novel Cu+/Eu3+co-doped borosilicate glasses are potential as fast response and tunable photoluminescence materials.
Original languageEnglish
Pages (from-to)-
JournalOptical Materials
DOIs
Publication statusAccepted/In press - 2018
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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