Fabrication et caractérisations électriques de films minces pour les cellules solaires organiques PDF Download

Author: Maria Luisa Braunger
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Dans le domaine du photovoltaïque organique, il y a un effort continu pour améliorer l'efficacité des dispositifs. Afin d'atteindre cet objectif, il est nécessaire d'évaluer les caractéristiques qui influencent leur performance. Bien que les films minces de polymères conjugués (dérivés de polythiophène et polymères à faible bande interdite) aient été largementétudiés pour des applications dans des cellules photovoltaïques, peu d'études concernent l'influence de la nanostructuration des films dans de tels dispositifs. Dans ce contexte, l'objectif général de ce travail était d'analyser l'influence de la technique de dépôt de couches minces de dérivés de polythiophène dans des dispositifs photovoltaïques organiques. Le technique de dépôt de Langmuir-Schaefer (LS) a été comparée à celle de spin-coating, plus fréquente. Les films de polythiophène ont été caractérisés par des mesures de transport électrique (courant-tension, photoconductivité, voltampérométrie cyclique et spectroscopied'impédance), spectroscopies optique (UV-visible et fluorescence) et des techniquesmorphologiques (à force atomique et techniques de microscopie à angle de Brewster, etprofilométrie). A partir des mesures électriques à courant continu, il peut être observé que lesfilms LS sont plus conducteurs que ceux obtenus par spin-coating. D'un point de vuemorphologique, il s'avère que la technique de dépôt influence la performance du dispositifphotovoltaïque, en raison de l'organisation et de la nanostructuration fournies par la techniquede la LS. Une étude préliminaire a également été réalisée sur des films de polymères à faiblebande interdite à base de cyclopentadithiophène, réalisés par la technique de Langmuir-Blodgett.

Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659

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This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

Author: Commission of the European Communities
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 256

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Author: Wonbong Choi
Publisher: CRC Press
ISBN: 1439861889
Category : Science
Languages : en
Pages : 374

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Since the late 20th century, graphene-a one-atom-thick planar sheet of sp2-bonded carbon atoms densely packed in a honeycomb crystal lattice-has garnered appreciable attention as a potential next-generation electronic material due to its exceptional properties. These properties include high current density, ballistic transport, chemical inertness,

Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472

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Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Author: Simon M. Sze
Publisher: John Wiley & Sons
ISBN: 1119429110
Category : Technology & Engineering
Languages : en
Pages : 944

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The new edition of the most detailed and comprehensive single-volume reference on major semiconductor devices The Fourth Edition of Physics of Semiconductor Devices remains the standard reference work on the fundamental physics and operational characteristics of all major bipolar, unipolar, special microwave, and optoelectronic devices. This fully updated and expanded edition includes approximately 1,000 references to original research papers and review articles, more than 650 high-quality technical illustrations, and over two dozen tables of material parameters. Divided into five parts, the text first provides a summary of semiconductor properties, covering energy band, carrier concentration, and transport properties. The second part surveys the basic building blocks of semiconductor devices, including p-n junctions, metal-semiconductor contacts, and metal-insulator-semiconductor (MIS) capacitors. Part III examines bipolar transistors, MOSFETs (MOS field-effect transistors), and other field-effect transistors such as JFETs (junction field-effect-transistors) and MESFETs (metal-semiconductor field-effect transistors). Part IV focuses on negative-resistance and power devices. The book concludes with coverage of photonic devices and sensors, including light-emitting diodes (LEDs), solar cells, and various photodetectors and semiconductor sensors. This classic volume, the standard textbook and reference in the field of semiconductor devices: Provides the practical foundation necessary for understanding the devices currently in use and evaluating the performance and limitations of future devices Offers completely updated and revised information that reflects advances in device concepts, performance, and application Features discussions of topics of contemporary interest, such as applications of photonic devices that convert optical energy to electric energy Includes numerous problem sets, real-world examples, tables, figures, and illustrations; several useful appendices; and a detailed solutions manual for Instructor's only Explores new work on leading-edge technologies such as MODFETs, resonant-tunneling diodes, quantum-cascade lasers, single-electron transistors, real-space-transfer devices, and MOS-controlled thyristors Physics of Semiconductor Devices, Fourth Edition is an indispensable resource for design engineers, research scientists, industrial and electronics engineering managers, and graduate students in the field.

Author: Jacqueline Ki-Zerbo
Publisher: Univ of California Press
ISBN: 9780520066960
Category : History
Languages : en
Pages : 372

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Book Description
"This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description

Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438

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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.

Author: Rauch, Tobias
Publisher: KIT Scientific Publishing
ISBN: 3731501546
Category : Conjugated polymers
Languages : en
Pages : 242

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Book Description
Solution-processed photodiodes with infrared sensitivities at wavelengths beyond the bandgap of silicon would be a significant advance towards cost-effective imaging. Colloidal quantum dots are highly suitable as infrared absorbers for photodetection. The concept of organic bulk heterojunctions sensitized with PbS nanocrystalline was proved with efficient near-infrared detection up to 1.8 mm for NIR imaging on active matrix TFT backplanes and demonstrated x-ray sensitivity.

Author: Sébastien Forget
Publisher: Springer
ISBN: 3642367054
Category : Science
Languages : en
Pages : 179

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Book Description
Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.