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.
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.
