Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"TRPL"”.
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Investigation of the Interface Recombination Velocity of Native Oxide/iii-V Semiconductor Interfaces
… the IRV was extracted from variable temperature TRPL measurements performed on selected samples. The activation energies of the interface recombination velocities agreed with previously established results on unoxidized material interfaces.
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Luminescent Harnessing of 2D Transition Metal Dichalcogenide Excitons
… (MoSe2). Steady state and time resolved PL (TRPL) microscopy uncover the photophysics of PL enhancement by OA treatment, and provides insights into the surface passivation mechanism. Electronic measurements of 2D TMD field effect transistors support the conclusions drawn from optical …
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Investigation of exciton dynamics and electronic band structure of InP and GaAs nanowires
… (PL), Time-resolved photoluminescence (TRPL) and Photoluminescence excitation (PLE) spectroscopy to investigate optical and electronic properties of individual Zincblend GaAs/AlGaAs core-shell and Wurtzite InP nanowires (NWs) at low temperatures (10K).</p><p> GaAs/AlGaAs core-shell NWs …
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Charge carrier transport and recombination in semiconductors: Insights from statistical analysis and machine learning techniques
… excitations are compared for obtaining local TRPL data and photoluminescence intensity maps in different semiconductor materials. Widefield excitation with confocal collection emerges as the preferred approach for materials with longer diffusion lengths, offering superior performance by …
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Cd3P2 Quantum Dots As Sources for Quantum Emission and Detection of Near-IR Radiation
… as the QYs of CQDs are directly linked with TRPL spectra, we show how measured TRPL spectra of CQDs can be used to predict spectroscopic properties of CQDs, such as QYs and intrinsic radiative lifetimes, using machine learning.
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Diffusion characterization of antimony-based type-II superlattices using electron beam induced current and time-resolved photoluminescence
… (EBIC) and time-resolved photoluminescence (TRPL) technologies. Moreover, we investigate how the molar composition of antimony and gallium affect on the diffusion characteristics of this materials.
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Ανάπτυξη και μελέτη τροποποιημένων πολυμερών πολυστυρενίου και πολυαιθυλενοξειδίου για αποδοτική εκπομπή φωτός από κβαντικές τελείες περοβσκίτη
… τέλος μετρήσεις της φωτοφωταύγειας (PL, PLQY, TRPL). Συμπέρασμα αυτής της έρευνας αποτελεί η επίτευξη της σταθεροποίησης και της αύξησης της φωτοφωταύγειας των κβαντικών τελειών περοβσκίτη με χρήση του πολυμερικού υποκαταστάτη PS-OH.
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Design and analysis of solar cells by coupled electrical - optical simulation
… using Time-Resolved Photoluminescence (TRPL) and Photoluminescence Excitation Spectroscopy (PLE). Overall, this thesis work has created a new simulation tool for advanced photovoltaic devices based on the self-consistent coupling of wave optics with electronic transport, which lead to …
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Crescita epitassiale e caratterizzazione di un epi-layer spesso di 4H-SiC per la rivelazione di neutroni
… La fotoluminescenza risolta nel tempo (TRPL) è stata utilizzata per stimare il tempo di vita dei portatori sull'intero strato epitassiale di 250 micron utilizzando diverse lunghezze d'onda per ottenere informazioni da diverse profondità. Inoltre, è stata condotta un'analisi dei …
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Defect characterization of antimonide-based type-II superlattices for infrared detection
… through time-resolved photoluminescence (TRPL) were demonstrated, forming a comprehensive characterization of the vertical transport qualities, including mobility and diffusivity. Additionally, we propose a sample design incorporating a T2SL in a bulk p-n diode for the application of deep …
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Characterization and modeling of CdCl2 treated CdTe/CdS thin-film solar cells
… measurements, time-resolved photoluminescence (TRPL), quantum efficiency (QE), and laser beam induced current (LBIC) measurements. Little change in microstructure was observed with extended CdCl2 treatment and is attributed to the high CdTe deposition temperatures used by heat pocket deposition …
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Characterization of, and novel architectures for, strained-layer superlattice infrared photodetectors
… of the material can be extracted. By performing TRPL and EBIC, InGaAs/InAsSb photodetectors with varying InGaAs Ga-fraction have been studied to show that the minority carrier mobility increases as the gallium composition increases. In the second part of this dissertation, we investigate …
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Metal oxides as buffer layers in polycrystalline CdTe thin-film solar cells
… improved minority carrier lifetimes. The rear TRPL illumination to probe a CdTe/TeOx surface measured lifetimes of few ns indicative of the TeOx as a back buffer layer to mitigate the effects of large defects on a free CdTe surface. These results demonstrate metal oxides as a promising …
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Semiconductor quantum dots for mid-IR light emission
… to study the emitter quality. According to our TRPL study as well as the optical study, we find that the sample with obvious nano- structure formation has the best optical performance and material quality, which makes the QD structure the best candidate for mid-IR emitter and laser applications. …