Dear Colleagues, Tomorrow (Thursday) I have the pleasure of hosting Prof. David Mitzi from Duke University (formerly IBM), who will give a CMSE seminar. There have been two late cancellations, so he now has available meeting slots at 2:15 and 3p. If anyone would like to meet with Prof. Mitzi, please reply to Gina Granzetta (cc'd here). I hope to see you at his seminar! Best, Raf -------- Forwarded Message -------- Subject: Meeting request: Prof. David Mitzi, Thur. Feb. 23 Date: Fri, 17 Feb 2017 13:41:57 -0500 From: Gina Franzetta <gfranzet(a)mit.edu> To: dmse-faculty <dmse-faculty(a)mit.edu>du>, dmse-postdocs <dmse-postdocs(a)mit.edu> Good afternoon, For those of you who are not already scheduled to meet with visiting speaker, Prof. David Mitzi from Duke University, next Thursday, there are still two spaces available to meet with him. At your earliest convenience, please share with me which of the following times you wish to be scheduled with him: *Thursday, February 23: 11:15 or 2:15*? Please find information on his talk below. Thank you, Gina *Prof. David Mitzi* *Thursday, February 23 @4 PM* *Chipman room, 6-104* *"Search for High-Performance Earth-Abundant Thin-Film Photovoltaic Materials"* Thin-film photovoltaic (PV) devices offer the prospect of lower-cost manufacturing coupled with high power conversion efficiency, thereby providing a pathway to cost-competitive solar energy. Currently, the fastest growing commercial thin-film PV technologies rely on direct bandgap chalcogenide semiconductors CdTe and Cu(In,Ga)(S,Se)_2 (CIGS), with cumulatively >15GW of capacity manufactured. In order to overcome prospective scalability issues related to elemental scarcity (Te, In) and/or heavy-metal toxicity (Cd) with these systems, this talk will present recent progress on alternative predominantly chalcogenide-based systems, including zinc-blende-related Cu_2 ZnSn(S,Se)_4 (CZTSSe), with abundant Zn/Sn replacing In/Ga, and more recent candidates, Cu_2 (Ba,Sr)Sn(S,Se)_4 and the perovskite (Ba,Sr)Zr(S,Se)_3 . If desirable electronic structure tunability associated with the multi-element stoichiometry (e.g., bandgap control using S:Se ratio) can be combined with control over disorder and defect formation in these complex systems, multinary chalcogenide semiconductors will offer a bright path forward in the quest for high-performance, low-cost and scalable PV technologies.