Public defence in Micro- and nanosciences, M.Sc. Vladislav Khayrudinov
Public defence from the Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering
When
Where
Event language(s)
The title of the thesis: Semiconductor nanowires on flexible plastic substrates
Thesis defender: Vladislav Khayrudinov
Opponent: Prof. Srinivasan Anand, KTH Royal Institute of Technology, Sweden
Custos: Prof. Harri Lipsanen, Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering
Nanowires (NWs) are ultra-thin semiconductor structures that exhibit unique electrical and optical properties. Flexible electronics are transforming optoelectronic devices by offering lightweight, durable, and cost-effective alternatives to rigid semiconductor materials. However, the integration of semiconductor nanowires with flexible plastic substrates has been a long-standing challenge due to the high temperatures required for their growth.
This dissertation presents innovative methods for the direct growth of III-V semiconductor nanowires on flexible plastic substrates using metalorganic vapor phase epitaxy (MOVPE). By developing a low-temperature growth regime, the research enables the production of high-quality nanowires directly on polyimide substrates, overcoming the temperature limitations of conventional NW fabrication.
Key achievements include the first successful direct growth of InAs, InP, InSb, and GaAs NWs on flexible plastics, as well as the demonstration of functional optoelectronic devices such as nanowire-based p-n junctions and light-emitting diodes (LEDs). These findings mark a significant step towards scalable, roll-to-roll-compatible, and industrially viable flexible optoelectronic devices.
The results of this research have broad implications for next-generation technology, including wearable electronics, bendable sensors, and flexible infrared photodetectors. By simplifying fabrication and reducing processing costs, this work brings semiconductor nanowires closer to real-world applications in consumer electronics, healthcare, and energy-efficient lighting.
Keywords: Semiconductor nanowires, flexible electronics, metalorganic vapor phase epitaxy (MOVPE), InAs, InP, InSb, GaAs, optoelectronic devices, nanotechnology, light-emitting diodes (LEDs), photoluminescence, photodetectors, low-temperature growth.
Thesis available for public display 10 days prior to the defence at: https://aaltodoc.aalto.fi/doc_public/eonly/riiputus/
Contact:
| vladislav.khayrudinov@aalto.fi |
Doctoral theses in the School of Electrical Engineering: https://aaltodoc.aalto.fi/handle/123456789/53