On the pathway of photoexcited electrons: probing photon-to-electron and photon-to-phonon conversions in silicon by ATR-IR

Yüce, Emre
Hansen, Ole
Mul, Guido
Gardeniers, Han (J. G. E.)
Photoexcitation and charge carrier thermalization inside semiconductor photocatalysts are two important steps in solar fuel production. Here, photoexcitation and charge carrier thermalization in a silicon wafer are for the first time probed by a novel, yet simple and user-friendly Attenuated Total Reflectance Infrared spectroscopy (ATR-IR) system.


The Effect of Synthesis Parameters for the Mesoporous Carbons Using Silica Aerogel Templates
Sarıyer, Merve; Sezgi, Naime Aslı (null; 2019-04-22)
Hydrogen is considered as one of the most promising future energy carrier due to its high energy density and its production through ethanol steam reforming reaction (SRE) has the potential to be used for its on board production, in fuel cell powered motor vehicles. Nowadays, novel catalysts are investigated for the steam reforming of ethanol reactions in order to achieve high hydrogen yield with low coke formation. One of the novel catalyst is a mesoporous material templated mesoporous carbon. Mesoporous ca...
On the applicability of progress variable approach for large eddy simulation of premixed flames
Tekgül, Bulut; Aksel, Mehmet Haluk; Baran, Özgür Uğraş; Department of Mechanical Engineering (2017)
Combustion applications are the primary energy source and will continue to be for the near future. Therefore, accurate modeling of combustion applications is crucial to study and improve the processes. In this study, progress variable approach is used with the implementation of a source term found in literature to simulate selected fully premixed combustion applications. CFD computations and preprocessing steps were conducted using OpenFOAM C++ library. Thermophysical values were obtained from zero and one ...
Preparation and characterization of metal oxide supported group 9B metal nanoparticles and their use as electrocatalysts in water splitting
Akbayrak, Merve; Önal, Ahmet Muhtar; Department of Chemistry (2022-9-2)
Hydrogen has been regarded as a crucial energy carrier due to its high energy density. Therefore, there is an increasing attention for the production of hydrogen. Among the hydrogen production methods, water splitting is one of the well-known environmentally friendly methods for the production of hydrogen. Although a large variety of catalysts have been tested in water splitting, the development of efficient and long-lived electrocatalysts is still an important issue. This thesis covers the preparation, cha...
The influence of nutrient loading, climate and water depth on nitrogen and phosphorus loss in shallow lakes: a pan-European mesocosm experiment
Coppens, Jan; Hejzlar, Josef; Sorf, Michal; Jeppesen, Erik; Erdogan, Aeyda; Scharfenberger, Ulrike; Mahdy, Aldoushy; Noges, Peeter; Tuvikene, Arvo; Baho, Didier L.; Trigal, Cristina; Papastergiadou, Eva; Stefanidis, Kostas; Olsen, Saara; Beklioğlu, Meryem (2016-09-01)
Losses of phosphorus (P) and nitrogen (N) have important influences on in-lake concentrations and nutrient loading to downstream ecosystems. We performed a series of mesocosm experiments along a latitudinal gradient from Sweden to Greece to investigate the factors influencing N and P loss under different climatic conditions. In six countries, a standardised mesocosm experiment with two water depths and two nutrient levels was conducted concurrently between May and November 2011. Our results showed external ...
A study on the reactivity of various chars from Turkish fuels obtained at high heating rates
Magalhaes, Duarte; Riaza, Juan; Kazanç Özerinç, Feyza (Elsevier BV, 2019-03-01)
This work investigates the reactivity of chars produced from Turkish biomass and lignite fuels using a wire mesh reactor at high temperature and high heating rate. The fuels studied were olive residue, almond shell, and Soma lignite. Blends of Soma lignite-olive residue and Soma lignite-almond shell were prepared in proportions of 75:25 and 50:50 wt%, respectively. A wire mesh reactor is used for the pyrolysis of the samples in a controlled inert atmosphere at a uniform temperature of 1600 degrees C and at ...
Citation Formats
E. KARABUDAK, E. Yüce, S. SCHLAUTMANN, O. Hansen, G. Mul, and H. (. G. E. ). Gardeniers, “On the pathway of photoexcited electrons: probing photon-to-electron and photon-to-phonon conversions in silicon by ATR-IR,” PHYSICAL CHEMISTRY CHEMICAL PHYSICS, pp. 10882–10885, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35917.