Calendar

Feb
7
Thu
Seminar: Ilya Shipster @ Shaffer Hall 2
Feb 7 @ 3:00 pm – 4:00 pm
Feb
17
Sun
2019 Engineers Week
Feb 17 – Feb 23 all-day
Mar
20
Wed
Conference on Information Sciences and Systems (CISS)
Mar 20 – Mar 22 all-day
Mar
21
Thu
Homewood Schools’ PhD Hooding Ceremony @ Homewood Campus
Mar 21 @ 3:00 pm – 4:30 pm

This event honors our students who have completed or are completing doctoral degrees from summer 2018 through spring 2019, and recognizes not only their years of hard work and creativity, but also the devoted advisers who mentored and inspired them.

During the ceremony, advisers will hood each student as a public symbol of the student’s imminent doctoral status. This formal ceremony, which also includes family members and friends, is an ideal way to acknowledge and honor the hard work of each student and adviser before students head out into the world.

Apr
5
Fri
Alumni Weekend
Apr 5 – Apr 7 all-day
May
2
Thu
Seminar: Martin Styner, University of North Carolina @ Shaffer Hall 2
May 2 @ 3:00 pm
May
6
Mon
ECE Spring Assembly @ Hodson Hall
May 6 @ 12:00 pm – 2:00 pm
May
7
Tue
ECE Networking Event
May 7 @ 5:00 pm – 7:00 pm
May
8
Wed
External Advisory Committee
May 8 all-day
Nov
7
Thu
Seminar: Ahmad R. Kirmani, National Institute of Standards and Technology (NIST) @ Olin Hall 305
Nov 7 @ 3:00 pm – 4:00 pm
Seminar: Ahmad R. Kirmani, National Institute of Standards and Technology (NIST) @ Olin Hall 305

Title: Exploring scalable coating of inorganic semiconductor inks: the surface structure-property-performance correlations

Abstract: Inorganic semiconductor inks – such as colloidal quantum dots (CQDs) and transition metal oxides (MOs) – can potentially enable low-cost flexible and transparent electronics via ‘roll-to-roll’ printing. Surfaces of these nanometer-sized CQDs and MO ultra-thin films lead to surface phenomenon with implications on film formation during coating, crystallinity and charge transport. In this talk, I will describe my recent efforts aimed at understanding the crucial role of surface structure in these materials using photoemission spectroscopy and X-ray scattering. Time-resolved X-ray scattering helps reveal the various stages during CQD ink-to-film transformation during blade-coating. Interesting insights include evidence of an early onset of CQD nucleation toward self-assembly and superlattice formation. I will close by discussing fresh results which suggest that nanoscale morphology significantly impacts charge transport in MO ultra-thin (≈5 nm) films. Control over crystallographic texture and film densification allows us to achieve high-performing (electron mobility ≈40 cm2V-1s-1), blade-coated MO thin-film transistors.

Bio: Dr. Ahmad R. Kirmani is a Guest Researcher in the Materials Science and Engineering Division, National Institute of Standards and Technology (NIST) in the group of Dr. Dean M. DeLongchamp and Dr. Lee J. Richter. He is exploring scalable coating of inorganic semiconductor inks using X-ray scattering. He received his PhD in Materials Science and Engineering from the King Abdullah University of Science and Technology (KAUST) under the supervision of Prof. Aram Amassian in 2017 for probing the surface structure-property relationship in colloidal quantum dot photovoltaics. He has published 30 articles in high-impact journals such Advanced Materials, ACS Energy Letters and the Nature family, and is also a volunteer science writer for the Materials Research Society (MRS) since the last couple of years and has contributed 10 news articles, opinions and perspectives.

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