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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Carbon Single Wall Nanotubes: Low Barrier, Cu- Free Back Contact to CdTe Based Solar Cells

Khanal, Rajendra R. 20 August 2014 (has links)
No description available.
92

Evaluation of Large Area Polycrystalline CdTe Detector for Diagnostic X-ray Imaging

Jin, Xiance January 2011 (has links)
No description available.
93

Stability Issues in Sputtered CdS/CdTe Solar Cells

Paudel, Naba Raj January 2011 (has links)
No description available.
94

Reducing Threshold of Biexciton Formation in Semiconductor Nanocrystals through Their Self-Assembly into Nano-Antennae

Emara, Mahmoud M. 18 July 2008 (has links)
No description available.
95

Photoluminescence and Extended X-ray Absorption Fine Structure Studies on CdTe Material

Liu, Xiangxin 20 June 2006 (has links)
No description available.
96

Theoretical modeling of polycrystalline thin-film photovoltaics

Attygalle, Muthuthanthrige Lilani Chandrawansha 10 June 2008 (has links)
No description available.
97

Issues in the Development of All-Sputtered ZnO/CdS/CdTe Flexible Solar Cells

Vasko, Anthony C. 25 September 2009 (has links)
No description available.
98

Spectroscopic Ellipsometry Studies of II-VI Semiconductor Materials and Solar Cells

Chen, Jie January 2010 (has links)
No description available.
99

Etude des réponses temporelle et spectrale de l'instrument ECLAIRs pour la mission SVOM / Studies of temporal and spectral responses of the eclairs instrument for the mission svom

Bajat, Armelle 09 October 2018 (has links)
La mission Franco-chinoise SVOM (Space based multi-band Variable astronomical Object Monitor), est dédiée à l'étude des sursauts ƴ, intenses et brèves bouffées de photons en X et ƴ, associées à la formation catastrophique de trous noirs. SVOM embarquera en 2021 quatre instruments observant du visible jusqu'aux rayonnements ƴ. ECLAIRs, télescope principal, est une caméra à masque codé capable de détecter et localiser, environ 200 sursauts pendant les trois années de vie de la mission. Son plan de détection compte 6400 détecteurs CdTe à contact Schottky, qui sont regroupés en matrice de 32 formant un module. Le plan est divisé en huit secteurs électroniquement indépendants, composés chacun de 25 modules. Chaque électronique est dédiée à la lecture et au codage du temps, de la position, de la multiplicité et des énergies des événements détectés sur un secteur. La validation des fonctionnalités de l'électronique de lecture a permis de s'assurer du bon codage des événements, d'estimer les limites de l'électronique et de construire un modèle analytique de correction efficace des événements perdus. Une application à une courbe de lumière d'un sursaut brillant a permis de valider théoriquement ce modèle et des mesures réalisées sur le prototype ont permis de le valider expérimentalement. D'autre part, un modèle complet de la réponse spectrale a été construit afin de caractériser chaque détecteur pavant le secteur du prototype et d'estimer la réponse du plan de détection des photons mono-énergétiques. Les processus physiques des interactions rayonnement-matière ont été simulés ainsi qu'un modèle de perte de charges puis une convolution gaussienne permet de considérer le bruit électronique. Ce modèle, comptant six paramètres libres, est ajusté à des spectres réalisés sur le prototype. L'étude des paramètres extraits caractérise les performances de chaque détecteur dans toutes les configurations de tension et de t peaking et permet d'optimiser les performances de l'instrument. / The french-chinese mission SVOM (Space-based multi-band variable Astronomical Object Monitor), is dedicated to the study of ƴ-rays bursts, brief and intense X and ƴ photons flashes, associated with the catastrophic formation of black holes. SVOM will embark in 2021 four instruments observing from the visible to ƴ rays. ECLAIRs, the main telescope, is a coded mask camera able to detect and locate, about 200 bursts during the three years nominal life time of SVOM. Its detection plan counts 6400 Schottky CdTe detectors, grouped into a matrix of 32 pixels forming a module. The plan is divided into eight electronically independent sectors, each consisting of 25 modules. Each electronic is dedicated to read and encode, the time, the position, the multiplicity and the energies of the detected events on a sector. The validation of each functionality of the readout electronics allows to ensure the correct encoding of the events, to estimate the limits of the electronics and to build an analytical model of lost events efficient correction. An application to a lightcurve of a bright GRB permits to validate theoretically this model and measurements carried out on the prototype validates it experimentally. On the other hand, a complete model of the spectral response has been established to characterize each detector on the sector of the prototype and to estimate the response of the plan of detection of the mono-energetic photons. The physical processes of the radiation-matter interactions are simulated as well as a model of lost charges then a Gaussian convolution takes into account the electronic noise. This model, counting six free parameters, is fitted to spectra measured on the prototype. The study of the extracted parameters characterizes the performance of each detector in every voltage and t peaking configurations optimizing the performance of the instrument.
100

Analýza signálů z transportních a stochastických charakteristik detektorů záření / Signal analysis of transport and stochastic processes of emission detectors

Míšek, David January 2008 (has links)
This Diploma thesis deals with properties of CdTe detectors. This material is ranked among optical sensitive group. This thesis can be thematically divided into two basic parts. The first part describes properties of both elements and the chemical adduct. Selected properties show perfections of the material, which are specializing it to optical area of application. The end of this part contains description of contact metal-semiconductor. This problem is important to comprehension principle the material contact. In second part there were making many measurements. For more accurately compare were first measurements doing without light and then with light. During making measurement was changed wave length and temperature of sample. Key factors were Volt-Ampere characteristics and resistance result with changed temperature and wave length impact to the sample. For better accuracy measurements were done many times. All of data from measurement were cultivate by PC Easyplot programme.

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