Upcoming seminars

Seminars at DIFFER cover a wide range of topics and are held on Thursdays at 11.15 AM in the seminar room of the institute (unless otherwise stated). Seminars are open to everybody. If you are interested in visiting a DIFFER seminar or want to subscribe to our mailing list, please follow the instructions for external visitors.

List all past seminars organized at DIFFER

Prof. dr. Saskia Lavrijssen / Brenda Espinoza
February 13th 2020
11:15 to 12:15
-abstract pending-
Philipp Hofmann
February 27th 2020
11:15 to 12:15
The storage of intermittent solar energy in chemical bonds, i.e. Solar Fuels, is the most promising way to a future greener energy infrastructure. Chemical specificity in the investigation of the multiscale transient phenomena during semiconductor-driven photoelectrochemical (PEC) redox reactions is the key to a comprehensive understanding and modelling of the processes occurring in Solar Fuel generators. Interfacial energetics and dynamics crucially determine the performance of semiconductor photoelectrodes for (solar) chemical energy conversion. We use a suite of lab- and synchrotron-based X-ray photoemission spectroscopies to investigate interfacial energetics and dynamics in inorganic photoabsorbers. Examples comprise the elucidation of the role of polymorphic marcasite in pyrite (both FeS2) [1] in enhancing the photoresponse of pyrite based photoelectrodes as well as the evolution and tailoring of surface photovoltage in InP single crystal based model photocathodes for H2 evolution. [2] Employing XPS based surface photovoltage measurements, we determine the impact of photoreduced surface states in CuBi2O4 photocathodes on their photoresponse. Using the Eindhoven lab-based near-ambient pressure PES facility, the role of varying surface adsorbates could be studied, which is an important step forward towards bridging interface characterization in (ultra-high) vacuum-based and electrochemical conditions. In this lecture, I will highlight the X-ray photoemission methods used and showcase application examples on sulphide, phosphide and oxide photoabsorbers.
Hylke Koers and Hans van Piggelen
March 5th 2020
11:15 to 12:15
* Abstract pending *
Dr. Francesco Maresca
March 26th 2020
11:15 to 12:15
* abstract pending *

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