Mike Toney (SIMES Seminar)

Date(s) - Jan 30 2015
11:00 AM - 12:00 PM

Shasta Room, Bldg. 40, Room 361


How Structure Matters in Thin Film Photovoltaic Materials

Mike Toney


The development of a carbon free economy is probably the greatest challenge facing humanity in the coming decades. Due to the sheer abundance of available sunlight, solar energy will play a large part in developing carbon-free energy sources. To be truly scalable, solar cell materials must be Earth abundant and require small energy input for manufacturing (i.e., sustainability), which drives the discovery and development of new solar materials. In this talk, I will describe research done at SSRL on understanding how structure and chemistry affect thin film photovoltaic properties for four different material classes. 1. Our recent spectroscopy and scattering on the exciting, new methylammonium lead trihalide perovskites (CH3NH3PbI3-XClX) have provided insight into how processing influences film structure and composition. 2. Lattice site disorder in CuZnSnSSe (CZTS) films, a non-toxic Earth abundant solar absorber, was quantified and identified as a possible limiting factor in PV performance. 3. Non-equilibrium growth, guided by computational modeling as validated at SSRL, has been used to develop p-type spinel transparent conductors. 4. The role of solution processing additives in improving morphology and performance in organic photovoltaics (plastic solar cells) has been elucidated with scattering.