Nanoscale investigation of potential distribution in operating Cu(In,Ga)Se2 thin-film solar cells PDF Download
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Author: Zhenhao Zhang
Publisher: KIT Scientific Publishing
ISBN: 386644978X
Category : Science
Languages : en
Pages : 190
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Book Description
The distribution of the electrostatic potential in and between the materials in Cu(In,Ga)Se2 thin-film solar cells has a major impact on their superior performance. This thesis reported on the nanoscale imaging of the electrostatic potential on untreated cross sections of operating Cu(In,Ga)Se2 solar cells using Kelvin probe force microscopy.
Author: Zhenhao Zhang
Publisher: KIT Scientific Publishing
ISBN: 386644978X
Category : Science
Languages : en
Pages : 190
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Book Description
The distribution of the electrostatic potential in and between the materials in Cu(In,Ga)Se2 thin-film solar cells has a major impact on their superior performance. This thesis reported on the nanoscale imaging of the electrostatic potential on untreated cross sections of operating Cu(In,Ga)Se2 solar cells using Kelvin probe force microscopy.
Author: Zhenhao Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Daniele Menossi
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659334498
Category :
Languages : en
Pages : 212
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Book Description
Nowadays, thin-film solar cells potentially offer a suitable technology for solving the energy production problem with an environmentally friendly method. Besides, thin film technologies show advantages over their bulk-semiconductor counterparts due to their lighter weight, flexible shape and device fabrication schemes and low cost in large-scale industrial production. Although many books currently exist on general concepts of PV materials and devices, few are offering a comprehensive overview of the fast development in thin film Cu(In, Ga)Se2-based solar cells. "Key Developments in CuInGaSe2 Thin Film Solar Cell" would provide an international perspective on the latest research on this topic. It presents a wide range of scientific and technological aspects on basic properties and device physics of high-efficiency CIGS solar cells from the last research frontier point of view. The book was designed for photovoltaic researchers and scientists, students and engineers, with the mission to provide knowledge of the mechanisms, materials, devices, and applications of CIGS-based technology necessary to develop cheaper and cleaner renewable energy in the coming years.
Author: Debora Regula Keller
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Enrico Avancini
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Maurizio Ritzer
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Book Description
As an alternative for Si-based solar cells Cu2ZnSn(S,Se)4 (CZTSSe) and Cu(In,Ga)Se2 (CIGS) thin film solar cells have recently received great attention as their efficiency has been steadily increased over the past decades. Nevertheless, the efficiency is still below the theoretically predicted upper limit, which is mainly related to inhomogeneities in the absorber composition, structural defects, and the formation of secondary phases. This thesis provides insights into efficiency-limiting properties of highly efficient Ge-doped CZTSe, CZTSSe, and CIGS thin film solar cells by accessing local compositional, structural, microstructural, and functional properties using a combinatorial approach of electron- and advanced synchrotron-based methods at the nanoscale: First, it has been demonstrated that an exceptionally homogeneous element distribution in the CZTSe absorber accompanied by the absence of harmful Cu-, Zn- or Sn-based secondary phases is achieved by introducing small amounts of Ge during the synthesis. Within the absorber, Ge is heterogeneously incorporated into the CZTSe matrix, but also forms nanoscale GeO2 secondary phases. Second, the interplay of performance-limiting nanoscale features in CZTSSe solar cells were revealed. Investigations of the local composition indicates the formation of harmful ZnS(Se) secondary phases whose presence, number, and dimension increases strongly with the reduction of Cu and the increase of Zn content. Furthermore, the local composition of the CZTSSe phase shows strong variations within the absorber, which significantly reduces the efficiency. Third, a CIGS solar cell that underwent a post-deposition treatment with RbF was investigated in a combinatorial approach, which simultaneously monitors the local composition and device functionality. This work demonstrates that Rb-enriched grain boundaries have a negligible influence on the collection efficiency, indicating the passivation of detrimental defects.
Author: Wei Wang
Publisher:
ISBN:
Category : Chalcopyrite
Languages : en
Pages : 107
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Book Description
CuInGaSe2 (CIGS), a promising thin film solar cell material, has gained lots of attention in decades due to its high energy conversion efficiency and potential lower manufacture cost over conventional Si solar cells. As a cheaper processing method compared to vacuum-based techniques, solution-based deposition has been successfully applied to fabricate electronic devices, such as transistors and solar cells. In my research, CIGS thin film solar cells with energy conversion efficiencies up to 8.01% were successfully fabricated using newly developed air-stable, low-cost inks. The inks consist of commercially available, low-cost compounds and solvents and can be processed using a variety of printing and coating techniques. More importantly, it can synthesize CIGS films free of contamination from copper selenides and amorphous carbon which are common issues for most of solution-based techniques. Besides, high-quality micrometer-sized CIGS films were obtained by using our enhanced selenization approach. Various characterization techniques were employed to qualitatively and quantitatively characterize the semiconductor materials and devices fabricated by this process. The mechanism for the transformation from metal salt precursor films to CIGS absorber thin films and the influence of ink composition and selenium vapour pressure on absorber film quality and photovoltaic device performance were investigated and discussed.
Author: Mahdieh Aghamohammadi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Fridolin Tchangnwa Nya
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0
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Book Description
In this chapter, we investigate a way of improving solar cells performances. By focusing studies on optimizing the structural, the opto-electrical and electronic properties of materials that constitute the layers and interfaces of a solar device, such as electrical susceptibility, doping concentration, mobility of charge carriers and crystallographic structure, it is possible to improve the output parameters of a solar cell. Working on a CIGSe-based second-generation ultra-thin solar cell model, and using Zinc Sulfide (ZnS) as a window layer, and based on recent studies, vital information are found on the optimal values of these properties that may enhance the efficiency of the cell. A correct modeling of the device with a trusted software such as SCAPS and an appropriate set of the exact conditions and parameters of simulation allow to obtain very promising results. In particular, for nanoscale and microscale thicknesses of buffer and absorber layers materials respectively, and with an appropriate choice of other materials properties such as intrinsic doping concentration, electrons and holes mobilities, it is possible to record efficiencies and fill factors of more than 26% and 85% respectively. These values are very promising for solar energy harvesting technologies development through CIGSe ,Äì ZnS based solar devices.
Author: Jef Poortmans
Publisher: John Wiley & Sons
ISBN: 0470091266
Category : Science
Languages : en
Pages : 504
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Book Description
Thin-film solar cells are either emerging or about to emerge from the research laboratory to become commercially available devices finding practical various applications. Currently no textbook outlining the basic theoretical background, methods of fabrication and applications currently exist. Thus, this book aims to present for the first time an in-depth overview of this topic covering a broad range of thin-film solar cell technologies including both organic and inorganic materials, presented in a systematic fashion, by the scientific leaders in the respective domains. It covers a broad range of related topics, from physical principles to design, fabrication, characterization, and applications of novel photovoltaic devices.
