Alan Sellinger Research Group

Principal Investigator


The Boss |

Alan Sellinger received his B.S. in Chemistry from Eastern Michigan University in 1989. After 2 years as a Research Associate at Gelman Sciences, Inc., he obtained his Ph.D. degree in 1997 from the University of Michigan in Macromolecular Science & Engineering under the guidance of Prof. Richard M. Laine. He then moved to Sandia National Laboratories in Albuquerque, NM for postdoctoral work with Prof. C. Jeffrey Brinker. From 1998 to 2003, he worked as a Research Scientist in the industrial R&D laboratories of Canon Research Center Americas, Palo Alto, CA and Opsys US Corporation, Fremont, CA. From 2003-2008, he held the position of Senior Scientist at the Institute of Materials Research and Engineering (IMRE), under the Agency for Science, Technology and Research (A*STAR), Republic of Singapore. He then moved to Stanford University from 2008-2012 as both Consulting Associate Professor in Materials Science & Engineering, and Executive Director of the Center for Advanced Molecular Photovoltaics (CAMP). Since 2012 he has been Associate Professor of Chemistry and Geochemistry/Materials Science at the Colorado School of Mines and Senior Scientist at the National Renewable Energy Lab (NREL). His research interests are in the synthesis of new hybrid materials for application in light emitting diodes (OLED), photovoltaics (OPV), thin film transistors (OTFT), and scintillation (radiation detection).

Postdoctoral Fellow


Henok Yemam

Henok Yemam received his BA in chemistry from Colorado College in May 2012. In 2017, he received his PhD degree in Applied Chemistry from Colorado School of Mines under Dr. Sellinger’s guidance. His research focus is synthesizing fluorescent dopants for plastic scintillators and low band gap organo-nickel complexes for use in organic electronics. His hobbies include watching professional sports, cooking, discussing non-scientific issues and listening to old Ethiopian music.

Timothy Gehan

Tim received his B.S. in Chemistry from Siena College in 2009 and his B.S. in Chemical Engineering from Rensselaer Polytechnic Institute in 2010.  After which, he did his graduate work at the University of Massachusetts Amherst co-advised by Prof. Paul Lahti and Prof. Dhandapani Venkataraman, receiving his Ph.D. in Chemistry in 2015. There he worked on preparing organic photovoltaic devices from aqueous organic based nanoparticle solutions to establish structural control at multiple length scales. He continued on at the University of Massachusetts Amherst as a Manning Inventor Postdoctoral Fellow in 2016, advised by Prof. Dhandapani Venkataraman, working on preparing organic nanoparticle photovoltaic devices using roll-to-roll transferable methods.  He is currently a Postdoctroal Research Fellow at Colorado School of Mines, advised by Prof. Alan Sellinger, working on preparing stable perovskite photovoltaic devices with novel low-cost hole transporting layers.  His interests outside the lab include hiking, skiing, traveling, and enjoying good food with friends.

Graduate Students


Joshua Koubek

Joshua T. Koubek received his B.S. in chemistry (A.C.S. certified) specializing in forensic science with a minor in physics from The College of New Jersey in 2012.  After which, he was employed by BASF Corporation as an associate chemist assaying precious metals for two years.  He is currently a graduate student in Dr. Sellinger’s lab, where his research focuses on synthesizing and functionalizing carbon quantum dots for the use in photovoltaic and related applications.  His interests outside the lab include ballroom dancing, playing trombone, and enjoying the Colorado landscape.

Allison Lim

Allison graduated from Harvey Mudd College in 2016 with a B.S. in Chemistry with an emphasis in Materials (A.C.S. Certified). As a graduate student in Dr. Sellinger’s lab, she is currently focused on developing novel materials for plastic scintillators. Outside of lab, Allison enjoys playing soccer, hiking, and exploring Colorado.

Tracy Schloemer

Tracy H. Schloemer received her B.S. In Chemistry from the University of Michigan in 2009 and a M.A. In Educational Studies in 2010. She taught high school chemistry in the Denver metro area for six years. She was a 2009 Knowles Science Teaching Foundation teaching fellow, and was a lead author for the chemistry teaching blog ChemEdX. She is currently a graduate student in Dr. Sellinger’s lab, where her research focuses on synthesizing molecules for use as hole transporting materials in perovskite solar cells. Her interests outside the lab include hiking, cheering on Michigan football, and spending time with her husband.

Griselda Hernandez

Griselda Hernandez received a B.S. in Biochemistry from the University of Texas at El Paso in 2016. She helped advocate the value of research at her university as President of the Biochemistry Student Association. As a graduate student in Dr. Sellinger’s group, she is focusing on producing the next state-of-the-art of plastic scintillators. She enjoys yoga, hiking, snow boarding, and hanging out with her family.

Amy Keuhlen |

Amy Keuhlen graduated with a B.S. in Chemical Engineering with a Materials Focus in 2017 from the University of Colorado at Boulder. Throughout her time at CU, she developed a passion for polymers and supporting women in STEM; she continues pursuing these as a member of the Society of Women Engineers at Mines and through her research. Working in collaboration with researchers at the National Renewable Energy Lab, she develops new linkers for covalent organic frameworks and tests these materials for hydrogen storage applications. In her free time, Amy enjoys traveling, exploring the mountains, and trying out new recipes for her family and friends. 

Undergraduate Students