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.


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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...
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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 ...
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Mg2Ni is a well-known hydrogen storage alloy. Most of the preparative methods for this alloy require high temperature processing of pure magnesium and nickel. The proposed method, studied in this work, involves the production of Mg2Ni alloy directly from NiO and MgCl2 in an electrochemical cell. This method can eliminate the difficulties that may arise, during handling due to the reactive nature of metallic components, especially Mg. XRD patterns of reduced samples indicated the partial formation of Mg2Ni. ...
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Kinetic parameters obtained by various thermal analysis methods are widely used in petroleum and other industries. These methods are restricted to relatively simple models that consist of a single equation and have usually uneven sensitivity on the uncertainty of the experimental data due to logarithmic conversions. An important consideration affecting the success of the linearization methods is that the proper selection of the beginning and the end of the linear section. A new method was implemented in adv...
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.