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Polarized white light from hybrid organic/III-nitrides grating structures
M Athanasiou1, R M Smith1, S Ghataora1
1Department of Electronic and Electrical Engineering, University of Sheffield, United Kingdom.
Scientific Reports
|January 4, 2017
Summary
Researchers developed a hybrid device for highly polarized white light emission. Combining InGaN/GaN multiple quantum wells with a 1D grating and F8BT polymer achieved efficient energy transfer and polarization.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Achieving highly polarized white light emission is crucial for advanced display and lighting technologies.
- Existing methods often involve complex structures or limited polarization efficiency.
Purpose of the Study:
- To develop a hybrid organic/inorganic device for highly polarized white light emission.
- To enhance non-radiative energy transfer (NRET) efficiency through optimized device architecture.
Main Methods:
- Fabrication of hybrid devices using blue Indium Gallium Nitride/Gallium Nitride (InGaN/GaN) multiple quantum wells (MQWs).
- Integration of a one-dimensional (1D) grating structure with a yellow light-emitting polymer (F8BT).
- Utilizing nano-confinement within the grating's nano-channels to align the polymer and enhance polarization.
Main Results:
- The hybrid device achieved highly polarized white light emission.
- A polarization degree of up to 43% was demonstrated with the smallest nano-channel width.
- A 2.5-fold enhancement in NRET efficiency was observed, reaching a maximum of 90% due to optimized dipole orientation.
Conclusions:
- The developed hybrid device successfully generates highly polarized white light.
- The approach enables efficient non-radiative energy transfer between organic and inorganic components.
- This fabrication strategy offers a promising pathway for creating high-performance polarized white light emitters.
