Fabrication of Single Crystal Gallium Phosphide Thin Films on Glass
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Applied Physics and Materials Science
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis; Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy and Inst. for Solar Fuels
Due to its high refractive index and low absorption coefficient, gallium phosphide is an ideal material for photonic structures targeted at the visible wavelengths. However, these properties are only realized with high quality epitaxial growth, which limits substrate choice and thus possible photonic applications. In this work, we report the fabrication of single crystal gallium phosphide thin films on transparent glass substrates via transfer bonding. GaP thin films on Si (001) and (112) grown by MOCVD are bonded to glass, and then the growth substrate is removed with a XeF2 vapor etch. The resulting GaP films have surface roughnesses below 1 nm RMS and exhibit room temperature band edge photoluminescence. Magnesium doping yielded p-type films with a carrier density of 1.6 × 1017 cm-3 that exhibited mobilities as high as 16 cm2V-1s-1. Therefore, due to their unique optical properties, these films hold much promise for use in advanced optical devices.
- Research Organization:
- Arizona State Univ., Tempe, AZ (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- EE0006335; AC02-05CH11231
- OSTI ID:
- 1425153
- Journal Information:
- Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Very High Refractive Index Transition Metal Dichalcogenide Photonic Conformal Coatings by Conversion of ALD Metal Oxides
|
journal | February 2019 |
Heteroepitaxy of GaP on silicon for efficient and cost-effective photoelectrochemical water splitting
|
journal | January 2019 |
Similar Records
Gallium phosphide optical metasurfaces for visible light applications
Silicon-Lattice-Matched Boron-Doped Gallium Phosphide: A Scalable Acousto-Optic Platform