Dative epitaxy of nitride semiconductors for advanced materials integration
Dative epitaxy offers a novel growth mechanism for nitride semiconductors, enabling integration on dissimilar substrates by leveraging donor-acceptor interactions. This method improves material compatibility and opens pathways for flexible, defect-tolerant optoelectronic and photonic devices.
Overview
Dative epitaxy is an innovative growth mechanism designed to enhance the integration of nitride semiconductors, such as GaN and AlN, with a variety of substrates. Unlike traditional epitaxial methods that require strict lattice matching or rely on weak van der Waals forces, dative epitaxy uses donor-acceptor interactions to mediate epitaxial alignment. This allows the deposited layer to align with the substrate through selective, localized bonding, providing robust interfacial interactions and greater tolerance for lattice mismatch. This technology presents a promising solution for overcoming challenges in nitride heterostructure growth, potentially advancing the development of flexible and defect-tolerant device architectures in optoelectronics, power electronics, and photonics.
Technical specifications
Key features:
- Utilizes donor-acceptor interactions for epitaxial alignment.
- Enables integration of nitride films on oxide or layered substrates.
- Reduces lattice and thermal mismatch issues, minimizing dislocations and strain.
- Applicable to GaN and AlN, expanding substrate options for high-quality film growth.
Applications:
- Optoelectronic devices
- Power electronic components
- Photonic systems
Technology readiness level
This technology is currently at TRL 3, with initial validation planned through a phased approach. Phase 1 involves demonstrating epitaxial growth of GaN using sputtering on small substrate sizes within six months. Subsequent phases involve testing on silicon substrates and scaling to larger wafer sizes, aiming for a comprehensive demonstration across various substrates over a three-year period.
About University at Buffalo, State University of New York
University at Buffalo is a comprehensive public research university and a leading campus in the State University of New York system. Industry engagement is anchored by co-located labs on a downtown medical campus, a research and technology park with incubators, shared core facilities, and co-op talent pipelines. Partnerships with regional hospitals enable clinical studies and translation, while proximity to the U.S.–Canada border and the binational Great Lakes corridor facilitates cross‑border collaboration. Research is supported by competitive federal funding from NIH, NSF, DOE, and DoD, alongside New York State innovation programs. A dedicated technology transfer office provides IP management, licensing, and startup support.
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