Research‎ > ‎

Novel Devices

Personnel:  Ju Ying Shang, Michael Moody, Jack Olding, Zhehao Zhu, Jason Kim
Collaborators: T. Marks, M. Hersam
Applications: novel logic devices, flexible electronics

Topological Heterojunctions

Discontinuities in the thickness of 2-D materials produce electrical heterojunctions due to changes in band 

structure. These novel junctions are electrically active 

and can serve as a foundation for new classes of 

devices. Gate tunable rectification and solar energy conversion have been observed at thickness junctions in MoS2. SPCM was used to investigate band offsets and power generation mechanisms.

S. L. Howell, D. Jariwala, C.-C. Wu, K.-S. Chen, V. K. Sangwan, J. Kang,
T. J. Marks, M. C. Hersam, and L. J. Lauhon. "
Investigation of
Band-Offsets at Monolayer–Multilayer MoS2 Junctions by
Scanning Photocurrent Microscopy" 
Nano Letters. 15 (4), 2278 (2015).

Mixed-Dimensional Heterostructures

Ultrathin semiconductor heterojunctions formed from mixed dimensional materials provide qualitatively novel types of device responses that can be exploited to design new and more efficient types of circuits. SPCM is used to analyze the operating principles of these devices in collaboration with the Hersam and Marks groups.

D. Jariwala, S. L. Howell, K.-S. Chen, J. Kang, V. K. Sangwan, S.A. Filippone, R. Turrisi, T. J. Marks, L. J. Lauhon, and M. C. Hersam. "Hybrid, Gate-Tunable, van der Waals p-n Heterojunctions from Pentacene and MoS2" Nano Letters. 16 (1), 497 (2016)

Additional References