Tim Gessert

Tim Gessert
Principal Scientist and Managing Member, Gessert Consulting, LLC


Timothy Gessert is the Principal Scientist and Managing Member of Gessert Consulting, LLC (Conifer, Colorado, USA), and a former/retired Principal Scientist at the National Renewable Energy Laboratory. Tim received undergraduate degrees in Physics and Mathematics from University of Wisconsin River Falls in 1982, M.Sc. in Physics from Colorado School of Mines in 1984, and Ph.D. in Applied Physics from University of Wales - College of Cardiff in 1996. His 40+ years of research have included synthesis and characterization for photovoltaic and other materials including GaAs, InP, Si, CuInGaSe2, CdTe, and transparent conducting oxides (TCOs). Major interests have also included training and mentoring of undergraduate and graduate students, and is presently or previously an adjunct faculty member at Colorado School of Mines, Colorado State University, University of Toledo, Vanderbilt University, and University of Illinois at Chicago.

Tim has collaboratively published over 230 papers, 2 books (on Vacuum Technology), 6 book chapters (on PV and TCOs), and has over 30 awarded or pending U.S. patents. He is active in developing and teaching both in person and virtual short courses and in developing related web content for institutions and societies involved in Vacuum Technology, Contamination Control, Transparent Conducting Oxides, and Thin-Film Photovoltaics.

Tim has been a long-term member of the American Vacuum Society (AVS, serving as President of the Society in 2022), the Society of Vacuum Coaters (SVC), the Materials Research Society (MRS), the Institute of Electrical and Electronic Engineers (IEEE), and the Institute of Physics (IOP, UK). He has served on numerous Conference Committees and Editorial Boards, and is presently the Editor-in-Chief of the technical journal Thin Solid Films.