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A novel violet/blue light-emitting device based on Ce2Si2O7.

Ling Li¹, Shenwei Wang¹, Guangyao Mu¹

¹Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing, 100044, China.

Scientific Reports

|November 14, 2015

Summary

Novel rare-earth silicates offer efficient silicon-based light sources. A new Cerium Silicate (Ce2Si2O7) device shows intense violet/blue light emission with a low turn-on voltage.

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Area of Science:

Materials Science
Solid-State Physics
Optoelectronics

Background:

Rare-earth silicates are promising for silicon-based light sources.
Developing efficient and stable light-emitting materials is crucial for integrated photonics.

Purpose of the Study:

To report a novel light-emitting device based on Cerium Silicate (Ce2Si2O7).
To investigate the electroluminescence properties and mechanisms of Ce2Si2O7.

Main Methods:

Fabrication of a light-emitting device using Ce2Si2O7.
Characterization of electroluminescence (EL) and photoluminescence (PL).
Analysis of emission mechanisms attributed to Ce(3+) ions.

Main Results:

Intense violet/blue electroluminescence observed from the Ce2Si2O7 device.
Low turn-on voltage of approximately 13 V achieved.
Emission attributed to 4f-5d transitions of Ce(3+) ions.

Conclusions:

Ce2Si2O7 is a viable material for efficient violet/blue light emission in silicon-based devices.
The interfacial reaction between CeO2 and Si is key to forming the emitting material.
Understanding EL and PL mechanisms is important for device optimization.