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Color-tunable Y2Si4N6C:Ce3+ Carbonitride Phosphors for Ultraviolet Light-Emitting Diodes

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Abstract:

La3+/Ce3+-codoped carbonitride phosphors-Y2Si4N6C were synthesized via a carbothermal reduction nitridation route. For the Ce3+-doped Y2Si4N6C phosphors, the emission spectrum exhibited a broad band at around 538 nm due to the fd transition of Ce3+ ions. When La3+ ions were incorporated into the host, the emitting colors of (Y, La)2Si4N6C: Ce3+ phosphors varied from a yellowish green to blue region. The great blue shift in emission bands was due to the variation in the crystal-field strength around the activators. In addition, (Y, La)2Si4N6C:Ce3+ phosphors exhibited high thermal stability, indicating the superior suitability in ultraviolet light-emitting diodes.

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1551-2916.2011.04571.x

Affiliations: Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10617, ROC

Publication date: 2011-06-01

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