Nanoscale investigation of potential distribution in operating Cu(In,Ga)Se2 thin-film solar cells PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Nanoscale investigation of potential distribution in operating Cu(In,Ga)Se2 thin-film solar cells PDF full book. Access full book title Nanoscale investigation of potential distribution in operating Cu(In,Ga)Se2 thin-film solar cells by Zhenhao Zhang. Download full books in PDF and EPUB format.
Author: Zhenhao Zhang Publisher: KIT Scientific Publishing ISBN: 386644978X Category : Science Languages : en Pages : 190
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
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: Yao-Tsung Hsieh Publisher: ISBN: Category : Languages : en Pages : 137
Book Description
It has been 64 years since Bell Laboratories built the first silicon solar cell in 1954. The harnessing of the almost unlimited energy from the sun for human civilization seems not an untouchable dream anymore. However, the rapid growth of the global population companied with the growing demand to enable a decent life quality causes the energy issue more challenging than ever. Nowadays silicon solar cells continue to take a leading position, not only offering potential solutions for energy demands but also stimulating the development of various photovoltaic technologies. Among them, solution processible thin film solar cells attract most attentions due to multiple advantages over traditional silicon solar cells. In this dissertation, I focus on two most promising types of them: 1) kesterite solar cells and 2) hybrid organic-inorganic perovskite solar cells. Particularly I work on the grain growth mechanism and processing techniques via nanoscale interface engineering to improve materials thin film properties and device architecture design. In Chapter 3, Cu2ZnSn(S,Se)4 was used as a model system to demonstrate the kinetic control of solid-gas reactions at nanoscale by manipulating the surface chemistry of both sol-gel nanoparticles and colloidal nanocrystals. It was identified that thiourea (commonly used as sulfur sources for metal sulfides) can transform to melamine during the film formation, and melamine would serve as surface ligands for as-formed Cu2ZnSn(S,Se)4 nanoparticles. These surface ligands can affect the solid-gas reactions during the selenization, which enable us to control film morphologies and device performance by simply adjusting the amount of surface ligands. To further enhance Cu2ZnSn(S,Se)4 device performance, a systematic investigation on alkali metal doping effect was conducted. In Chapter 4, alkali metal-containing precursors were used to study influences on Cu2ZnSn(S,Se)4 film morphology, crystallinity and electronic properties. K-doped Cu2ZnSn(S,Se)4 solar cells showed the best device performance. Due to the surface electronic inversion effect, various thickness of CdS buffer layers were tested on K-passivated Cu2ZnSn(S,Se)4 surface for further improving device efficiency. Over 8% power conversion efficiency of K-doped Cu2ZnSn(S,Se)4 solar cell with 35 nm CdS has been reached. Finally, in Chapter 5, the hybrid organic-inorganic perovskite solar cells are introduced. We demonstrated a novel tandem device employing nanoscale interface engineering of Cu(In,Ga)Se2 surface alongside a heavy-doped poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] hole transporting layer between the two subcells that preserves open-circuit voltage, and enhanced both fill factor and short-circuit current. As a result, we have successfully doubled the previous efficiency record for a monolithic perovskite/Cu(In,Ga)Se2 tandem solar cell to 22.43% power conversion efficiency, which is the highest record among thin film monolithic tandem photovoltaic devices. The conclusion and future outlooks of my works on kesterite and perovskites solar cells are summarized in Chapter 6.
Author: Daniele Menossi Publisher: LAP Lambert Academic Publishing ISBN: 9783659334498 Category : Languages : en Pages : 212
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: Vesselinka Petrova-Koch Publisher: Springer Nature ISBN: 3030228649 Category : Science Languages : en Pages : 320
Book Description
This book offers a bird’s-eye view of the recent development trends in photovoltaics – a big business field that is rapidly growing and well on its way to maturity. The book describes current efforts to develop highly efficient, low-cost photovoltaic devices based on crystalline silicon, III–V compounds, copper indium gallium selenide (CIGS) and perovskite photovoltaic cells along with innovative, cost-competitive glass/ flexible tubular glass concentrator modules and systems, highlighting recent attempts to develop highly efficient, low-cost, flexible photovoltaic cells based on CIGS and perovskite thin films. This second edition presents, for the first time, the possible applications of perovskite modules together with Augsburger Tubular photovoltaics.
Author: Wei Wang Publisher: ISBN: Category : Chalcopyrite Languages : en Pages : 107
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: R. Noufi Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
We report on a direct measurement of two-dimensional potential distribution on the surface of Cu(In, Ga)Se2 (CIGS) thin films using a nanoscale electrical characterization of scanning Kelvin probe microscopy (SKPM). The potential measurement reveals a higher surface potential or a smaller work function on grain boundaries (GBs) of the film than on the grain surfaces. This demonstrates the existence of a local built-in potential on GBs and that the GB is positively charged. The role of the built-in potential in device performance was further examined by tuning Ga content or band gap of the film. With increasing Ga content, the GB potential drops sharply in a Ga range of 28%-38%. Comparing the change in the built-in potential to the theoretical and experimental photoconversion efficiencies, we conclude that the potential plays a significant role in the device conversion efficiency of NREL's three-stage CIGS device.
Author: Zhenhao Zhang
Author: Zhenhao Zhang
Author: Zhenhao Zhang
Author: Yao-Tsung Hsieh
Author: Daniele Menossi
Author: Debora Regula Keller
Author: Vesselinka Petrova-Koch
Author: Enrico Avancini
Author: Wei Wang
Author: Mahdieh Aghamohammadi
Author: R. Noufi