Listar por tema "spectroscopy"
Mostrando ítems 1-9 de 9
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Charge transfer processes at the semiconductor/electrolyte interface for solar fuel production: insight from impedance spectroscopy
Royal Society of Chemistry (2016)Knowledge of the nature of charge transfer processes at the semiconductor/electrolyte interface is crucial for the optimization of semiconductors used for solar fuel production. In the literature, there are two types of ... -
Complete Characterization of Thermoelectric Materials by Impedance Spectroscopy
American Chemical Society (2019-05-01)Thermoelectric materials can directly convert waste heat into electricity. Because of the vast amount of energy available as waste heat in our society, these materials could contribute to reduce our dependence on fossil ... -
Ideal Impedance Spectroscopy Equivalent Circuits for Thermoelectric Materials and Devices
IEEE (2022-09)Impedance spectroscopy has been intensively developed in the last years in the field of thermoelectric materials. Current impedance models collect in high detail all the processes that occur in thermoelectric devices. In ... -
Operation Mechanism of Perovskite Quantum Dot Solar Cells Probed by Impedance Spectroscopy
American Chemical Society (2018)We fabricated perovskite quantum dot solar cells (PQDSCs) and varied the thickness of the QD layer by controlling the number of deposition cycles; the cells were systematically investigated with impedance spectroscopy. ... -
Optical Filter Based on a Spatially Patterned Kinoform Diffractive Lens
Institute of Electrical and Electronics Engineers (IEEE) (2009)We demonstrate a compact all-diffractive setup for spectral synthesis. The system is composed of a circularly symmetric mask attached to a kinoform diffractive lens. Following diffraction-based analysis, a Fourier transform ... -
Optimized Cation Exchange for Mercury Chalcogenide 2D Nanoplatelets and Its Application for Alloys
American Chemical Society (2021-11-29)II–VI two-dimensional (2D) nanoplatelets (NPLs) exhibit the narrowest optical features among nanocrystals (NCs). This property remains true for Hg-based NPLs, despite a cation exchange procedure to obtain them from Cd-based ... -
Rational Design of Carbon Nitride Photoelectrodes with High Activity Toward Organic Oxidations
Wiley (2022-12-12)Carbon nitride (CNx) is a light-absorber with excellent performance in photocatalytic suspension systems, but the activity of CNx photoelectrodes has remained low. Here, cyanamide-functionalized CNx (NCNCNx) was co-deposited ... -
Solution-processed small molecule:fullerene bulk-heterojunction solar cells: impedance spectroscopy deduced bulk and interfacial limits to fill-factors
Royal Society of Chemistry (2013)Using impedance spectroscopy, we demonstrate that the low fill factor (FF) typically observed in small molecule solar cells is due to hindered carrier transport through the active layer and hindered charge transfer through ... -
Thermal conductivity, electrical resistivity, and dimensionless figure of merit (ZT) determination of thermoelectric materials by impedance spectroscopy up to 250 °C
AIP Publishing (2018-07)Impedance spectroscopy has been shown as a promising method to characterize thermoelectric (TE) materials and devices. In particular, the possibility to determine the thermal conductivity λ, electrical conductivity σ, and ...