Nanostructures In Iii V Solar Cells PDF Download
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Author | : Dong Liang |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
Download Nanostructures in III-V Solar Cells Book in PDF, ePub and Kindle
From the physics and materials viewpoint, III-V materials are ideal for highly efficient photovoltaic conversion. Their major limitations are cost and resource availability. As industrial planar III-V solar cells continue to set the all-time efficiency records, nanostructured III-V solar cells are now being investigated in academia with the goal to further improve the efficiency and lower the required materials volume and cost. However, most previously investigated nano-structured solar cells suffer from low efficiencies. In this dissertation, I first present optical enhancement in nanopyramid III-V ultra-thin films which can potentially reduce the required materials by one order of magnitude. I then demonstrate significant efficiency improvement in GaAs solar cell. Especially, with an AlGaAs nanocone window layer, a 17%-efficiency nanostructured single-junction solar cell is obtained. The first part of my dissertation focuses on optical engineering and absorption improvement in nanopyramid GaAs ultra-thin film. I demonstrate a double-sided nanopyramid GaAs film that is only 160 nm thick, laminated in a flexible transparent superstrate. Without additional antireflection coatings, this nanopyramid film absorbs over 80% more photons than a planar counterpart with equal thickness at normal incidence and is equivalent to a 1um thick film. At large incident angles, this enhancement can be even greater. With similar light trapping design, III-V solar cell film thickness can be potentially reduced from 3-4 um to 200-300 nm, which could significantly reduce III-V cell cost. The second part of my dissertation focuses on efficiency improvement in III-V nanostructured solar cells. First, GaAs solar cell efficiency enhancement using ZnO nanoparticle antireflection coating is briefly demonstrated. I then demonstrate our work on nanostructured p-n junction solar cells and discuss the challenges for nanostructured solar cell. After this, I propose a nanowindow solar cell design that can overcome these challenges by enhancing both optical and electrical properties. A nanowindow solar cell using a nanocone AlGaAs window layer, a GaAs junction and mesa grid contact is demonstrated with a high energy conversion efficiency of 17.0% and high open circuit voltage of 0.982 V.
Author | : Gu Anjia |
Publisher | : |
Total Pages | : |
Release | : 2011 |
Genre | : |
ISBN | : |
Download Towards High Efficiency and Low Cost Nano-structured III-V Solar Cells Book in PDF, ePub and Kindle
State-of-the-art III-V multijunction solar cells have achieved a record efficiency of 42%, the highest solar-electric conversion efficiency achieved by any technology. This has fueled great interest in the utility sector for large-scale deployment of solar cells. However, III-V solar cells have thus far proven too expensive for widespread terrestrial applications due to the combined cost of substrates, growth processes and materials. Here, we propose a novel III-V solar cell design based on the epitaxial growth of AlGaAs/GaAs on pre-patterned low-cost substrates to provide a path to cost-effective, large-scale deployment. This approach is based on our discovery that the surface kinetics of epitaxial growth by MBE is significantly altered when growing on three dimensional nanostructures instead of planar surfaces. Based on our exploratory results, we present the device design, electrical and optical simulation, and materials growth and device fabrication and characterization of core-shell nanostructured III-V solar cells. We use both bottom-up and top-down approaches to prepare the nanostructured templates in shape of nanowires and nanopyramids. Finite-difference time-domain (FDTD) and Rigorous Coupled Wave Analysis (RCWA) simulation show that the nanostructures have enhanced absorption and much wider incident acceptance angles than their planar counterpart, and outperform planar three-layer anti-reflective coatings. We first demonstrated high quality, single crystal III-V (GaAs and AlGaAs) polar material conformally epi grown on group IV (nanostructured Ge on Si substrate) nonpolar material via MBE and MOVPE (also known as MOCVD) with largely reduced anti-phase domains. We developed complete and mature routines to fabricate a working, single crystalline III-V solar cell on a nanostructured template. The I-V characterization of the fabricated nanostructured GaAs solar cell proves the concept and shows the great potential of making high-efficiency nano-structured III-V solar cells on low-cost substrates.
Author | : Loucas Tsakalakos |
Publisher | : CRC Press |
Total Pages | : 458 |
Release | : 2010-03-25 |
Genre | : Science |
ISBN | : 1420076752 |
Download Nanotechnology for Photovoltaics Book in PDF, ePub and Kindle
Current concerns regarding greenhouse gas-related environmental effects, energy security, and the rising costs of fossil fuel-based energy has renewed interest in solar energy in general and photovotaics in particular. Exploring state-of-the-art developments from a practical point of view, Nanotechnology for Photovoltaics examines issues in increas
Author | : Jan Valenta |
Publisher | : CRC Press |
Total Pages | : 441 |
Release | : 2015-06-01 |
Genre | : Science |
ISBN | : 9814463647 |
Download Nanotechnology and Photovoltaic Devices Book in PDF, ePub and Kindle
Silicon is an abundant element and is produced in large quantities for the electronic industry. The falling price of this commodity also feeds the growth of solar photovoltaics (PV). However, solar cells (SCs) based on bulk semiconductors have quite limited maximum attainable performance. Therefore, new principles and materials are being investigat
Author | : Tetsuo Soga |
Publisher | : Elsevier |
Total Pages | : 616 |
Release | : 2006-12-14 |
Genre | : Science |
ISBN | : 0080468306 |
Download Nanostructured Materials for Solar Energy Conversion Book in PDF, ePub and Kindle
Nanostructured Materials for Solar Energy Conversion covers a wide variety of materials and device types from inorganic materials to organic materials. This book deals with basic semiconductor physics, modelling of nanostructured solar cell, nanostructure of conventional solar cells such as silicon, CIS and CdTe, dye-sensitized solar cell, organic solar cell, photosynthetic materials, fullerene, extremely thin absorber (ETA) solar cell, quantum structured solar cell, intermediate band solar cell, carbon nanotube, etc. including basic principle and the latest results. There are many books written on conventional p-n junction solar cells, but few books focus on new concepts in this area. * Focuses on the use of nanostructured materials for solar energy* Looks at a wide variety of materials and device types* Covers both organic and inorganic materials
Author | : Som Nath Dahal |
Publisher | : |
Total Pages | : 148 |
Release | : 2011 |
Genre | : Nanostructures |
ISBN | : |
Download Advanced Nanostructured Concepts in Solar Cells Using III-V and Silicon-based Materials Book in PDF, ePub and Kindle
As existing solar cell technologies come closer to their theoretical efficiency, new concepts that overcome the Shockley-Queisser limit and exceed 50% efficiency need to be explored. New materials systems are often investigated to achieve this, but the use of existing solar cell materials in advanced concept approaches is compelling for multiple theoretical and practical reasons. In order to include advanced concept approaches into existing materials, nanostructures are used as they alter the physical properties of these materials. To explore advanced nanostructured concepts with existing materials such as III-V alloys, silicon and/or silicon/germanium and associated alloys, fundamental aspects of using these materials in advanced concept nanostructured solar cells must be understood. Chief among these is the determination and predication of optimum electronic band structures, including effects such as strain on the band structure, and the material's opto-electronic properties. Nanostructures have a large impact on band structure and electronic properties through quantum confinement. An additional large effect is the change in band structure due to elastic strain caused by lattice mismatch between the barrier and nanostructured (usually self-assembled QDs) materials. To develop a material model for advanced concept solar cells, the band structure is calculated for single as well as vertical array of quantum dots with the realistic effects such as strain, associated with the epitaxial growth of these materials. The results show significant effect of strain in band structure. More importantly, the band diagram of a vertical array of QDs with different spacer layer thickness show significant change in band offsets, especially for heavy and light hole valence bands when the spacer layer thickness is reduced. These results, ultimately, have significance to develop a material model for advance concept solar cells that use the QD nanostructures as absorbing medium. The band structure calculations serve as the basis for multiple other calculations. Chief among these is that the model allows the design of a practical QD advanced concept solar cell, which meets key design criteria such as a negligible valence band offset between the QD/barrier materials and close to optimum band gaps, resulting in the predication of optimum material combinations.
Author | : Mohammad Azad Malik |
Publisher | : Royal Society of Chemistry |
Total Pages | : 532 |
Release | : 2017-11-08 |
Genre | : Science |
ISBN | : 1782624589 |
Download Nanostructured Materials for Type III Photovoltaics Book in PDF, ePub and Kindle
This book will give a collective insight into the different roles that nanostructured materials play in Type III solar cells.
Author | : Arthur Willoughby |
Publisher | : John Wiley & Sons |
Total Pages | : 342 |
Release | : 2014-01-13 |
Genre | : Technology & Engineering |
ISBN | : 111869581X |
Download Solar Cell Materials Book in PDF, ePub and Kindle
This book presents a comparison of solar cell materials, including both new materials based on organics, nanostructures and novel inorganics and developments in more traditional photovoltaic materials. It surveys the materials and materials trends in the field including third generation solar cells (multiple energy level cells, thermal approaches and the modification of the solar spectrum) with an eye firmly on low costs, energy efficiency and the use of abundant non-toxic materials.
Author | : S. K. Sharma |
Publisher | : Springer Nature |
Total Pages | : 354 |
Release | : 2020-01-07 |
Genre | : Technology & Engineering |
ISBN | : 3030363546 |
Download Solar Cells Book in PDF, ePub and Kindle
This book addresses the rapidly developing class of solar cell materials and designed to provide much needed information on the fundamental principles of these materials, together with how these are employed in photovoltaic applications. A special emphasize have been given for the space applications through study of radiation tolerant solar cells. This book present a comprehensive research outlining progress on the synthesis, fabrication and application of solar cells from fundamental to device technology and is helpful for graduate students, researchers, and technologists engaged in research and development of materials.
Author | : Sabu Thomas |
Publisher | : Elsevier |
Total Pages | : 0 |
Release | : 2019-06-13 |
Genre | : Technology & Engineering |
ISBN | : 9780128133378 |
Download Nanomaterials for Solar Cell Applications Book in PDF, ePub and Kindle
Nanomaterials for Solar Cell Applications provides a review of recent developments in the field of nanomaterials based solar cells. It begins with a discussion of the fundamentals of nanomaterials for solar calls, including a discussion of lifecycle assessments and characterization techniques. Next, it reviews various types of solar cells, i.e., Thin film, Metal-oxide, Nanowire, Nanorod and Nanoporous materials, and more. Other topics covered include a review of quantum dot sensitized and perovskite and polymer nanocomposites-based solar cells. This book is an ideal resource for those working in this evolving field of nanomaterials and renewable energy.