Design and Fabrication of Photonic Crystals and Diffraction Gratings for Ultra Thin Film Si Solar Cells - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Design and Fabrication of Photonic Crystals and Diffraction Gratings for Ultra Thin Film Si Solar Cells write by Xianqin Meng. This book was released on 2012. Design and Fabrication of Photonic Crystals and Diffraction Gratings for Ultra Thin Film Si Solar Cells available in PDF, EPUB and Kindle. Gratings are considered. The goal is to integrate such structures into ultra-thin film silicon photovoltaic solar cells, with a view to improve their conversion efficiency. First, a PCs assisted ultra-thin film crystalline silicon (c-Si) solar cell is designed optimized by using the Finite Different Time Domain (FDTD) approach. An increase over50% is achieved for the absorption, as integrated over the whole spectral range, by patterning a 2D PCs in the active Si layer. This enhancement is achieved by combining Slow Bloch modes and Fabry-Perot modes. In order to fabricate such solar cells, we developed a process based on Laser Holographic Lithography, Reactive Ion Etching and Inductivity Coupled Plasma etching. We have investigated the influence of the parameters taking part in these processes on the obtained patterns. Finally the optical and electrical properties of the devices have been characterized by our co-workers at IMEC, Belgium. Absorption measurements are in good agreement with the theoretical simulations. Moreover, the integrated absorption is tolerant with regard to the sunlight angle of incidence. The final fabricated 2D PCs patterned solar cell exhibits a 20% higher short circuit current (Jsc = 15mA/cm2) than the reference. Additionally, a more complex thin film c-Si solar cells integrating front and back diffraction gratings has been designed. Long wavelength absorption is increased thanks to the long period (750 nm) back grating, while the incident light reflection is reduced by using a short period (250 nm) front grating. A short-circuit current increase up to 30 mA/cm2 is predicted for this device, far above the 18 mA/cm2 value for the unpatterned reference These are first steps towards the development of a future generation of PC and diffraction grating assisted solar cells.
Photon Management in Solar Cells
Photon Management in Solar Cells - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Photon Management in Solar Cells write by Ralf B. Wehrspohn. This book was released on 2016-03-09. Photon Management in Solar Cells available in PDF, EPUB and Kindle. Written by renowned experts in the field of photon management in solar cells, this one-stop reference gives an introduction to the physics of light management in solar cells, and discusses the different concepts and methods of applying photon management. The authors cover the physics, principles, concepts, technologies, and methods used, explaining how to increase the efficiency of solar cells by splitting or modifying the solar spectrum before they absorb the sunlight. In so doing, they present novel concepts and materials allowing for the cheaper, more flexible manufacture of solar cells and systems. For educational purposes, the authors have split the reasons for photon management into spatial and spectral light management. Bridging the gap between the photonics and the photovoltaics communities, this is an invaluable reference for materials scientists, physicists in industry, experimental physicists, lecturers in physics, Ph.D. students in physics and material sciences, engineers in power technology, applied and surface physicists.
Advances in Silicon Solar Cells
Advances in Silicon Solar Cells - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Advances in Silicon Solar Cells write by Shadia Ikhmayies. This book was released on 2018-01-10. Advances in Silicon Solar Cells available in PDF, EPUB and Kindle. This book provides a review of all types of silicon solar cells. The scope includes monocrocrystalline Si solar cells, polycrystalline and amorphous thin-film silicon solar cells, and tandem solar cells. Production, treatment and development of these devices are reviewed. Limitations of these devices, design optimization, testing and fabrication methods are covered. In addition, current status and future prospects for the further development of silicon solar cells are addressed. Special emphasis is given to methods of attaining high efficiency and thereby cost-effective solar power. The aim of the book is to provide the reader with a complete overview about the recent advances in the structure and technology of all generations of silicon solar cells.
Photonic Crystals
Photonic Crystals - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Photonic Crystals write by Kurt Busch. This book was released on 2006-05-12. Photonic Crystals available in PDF, EPUB and Kindle. The majority of the contributions in this topically edited book stems from the priority program SPP 1113 "Photonische Kristalle" run by the Deutsche Forschungsgemeinschaft (DFG), resulting in a survey of the current state of photonic crystal research in Germany. The first part of the book describes methods for the theoretical analysis of their optical properties as well as the results. The main part is dedicated to the fabrication, characterization and modeling of two- and three-dimensional photonic crystals, while the final section presents a wide spectrum of applications: gas sensors, micro-lasers, and photonic crystal fibers. Illustrated in full color, this book is not only of interest to advanced students and researchers in physics, electrical engineering, and material science, but also to company R&D departments involved in photonic crystal-related technological developments.
Diffraction Grating Structures in Solar Cells
Diffraction Grating Structures in Solar Cells - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Diffraction Grating Structures in Solar Cells write by . This book was released on 2000. Diffraction Grating Structures in Solar Cells available in PDF, EPUB and Kindle. Sub-wavelength periodic texturing (gratings) of crystalline-silicon (c-Si) surfaces for solar cell applications can be designed for maximizing optical absorption in thin c-Si films. We have investigated c-Si grating structures using rigorous modeling, hemispherical reflectance, and internal quantum efficiency measurements. Model calculations predict almost (approximately)100% energy coupling into obliquely propagating diffraction orders. By fabrication and optical characterization of a wide range of 1D & 2D c-Si grating structures, we have achieved broad-band, low ((approximately) 5%) reflectance without an anti-reflection film. By integrating grating structures into conventional solar cell designs, we have demonstrated short-circuit current density enhancements of 3.4 and 4.1 mA/cm2 for rectangular and triangular 1D grating structures compared to planar controls. The effective path length enhancements due to these gratings were 2.2 and 1.7, respectively. Optimized 2D gratings are expected to have even better performance.
