About the Schelhas Group

artist rendition of in-situ formation of MnOx polymorphsTo study the in-situ formation of MnOx polymorphs our group loaded precursors into a thin glass tube and used X-rays at SSRL (top left) to observe the polymorph phase progression as it was forming (shown in bubbles). The experiment verified theoretical predictions made by scientists in the Ceder Group at Berkeley Lab with the help of supercomputers (right). (Image: Greg Stewart/SLAC National Accelerator Laboratory)

The Schelhas group is particularly interested in the structure-function relationship in optoelectronic materials and expanding this understanding to the processing, synthesis, and operation of novel materials.

Her groups recent work has helped develop operando techniques for characterizing novel solar absorber materials.  This work, in collaboration with the NREL perovskite team, has been used to characterize structure phase changes in CH3NH3PbI3 as a function of temperature during operation.  The team is currently using operando characterization to study degradation mechanism in HOIP alloys (e.g. CsxFA1-xPbI3). The researchers in our group actively participates in the Center for Next Generation Materials Design (CNGMD) Energy Frontier Research Center (EFRC), and has collaborated on numerous publications combining experiment and theory to provide a greater understanding of phase space in thin films, and powders.  The groups experience with solution synthesis techniques and in-situ X-ray techniques have provided critical insights into reaction pathways and synthetic parameters required to target functional materials. The group also provides advanced characterization and forensics for the Durable Module Materials (DuraMAT) Consortium, whose aim is to establish methods for materials characterization, to provide empirical data to understand module failures and degradation mechanisms to improve module lifetimes and reduce the levelized cost of electricity (LCOE).

 

Research