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Matin Amani, Ph.D. 2019

Electrical Engineering
Advisor: Prof. Javey

BIOGRAPHY

Monolayer Semiconductor Optoelectronics [BPN822]
While two dimensional (2D) semiconductors show great promise for optoelectronic applications, due to
a myriad of highly attractive properties which cannot be readily achieved in traditional III-V
systems, to date they have shown tremendously poor photoluminescence quantum yield (QY). High QY is a
requirement for materials used in key optoelectronic devices such as LEDs, lasers, and solar cells,
since it determines the efficiency of light emission. Traditional three-dimensional materials like
GaAs require lattice matched cladding layers to obtain high QY, on the other hand 2D materials which
have naturally terminated surfaces should be able to exhibit near-unity QY provided that there are no
defects in the crystal. To this end, we have recently demonstrated that through chemical treatments
with an organic superacid the defect sites on the surface of MoS2, the prototypical 2D material,
can be passivated. Solution based treatment of defects is especially effective in monolayer
semiconductors since the entire "bulk" of the semiconductor is also the surface. As a result, the QY
can be enhanced from less than 1% to over 95% in micromechanically exfoliated MoS2. In this project
we seek to expand this treatment to other 2D material systems and 2D materials grown by chemical
vapor deposition, as well as realize light emitting devices based on perfect optoelectronic
monolayers.


Current Active Projects:
BPN458
BPN822
BPN881
 

     Last Updated: Wed 2017-Aug-16 13:03:00

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