Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"back contact"”.
-
Two-Dimensional Modelling of Novel Back-Contact Solar cells
… carriers and light are relevant. We focus on back-contact perovskite solar cells, and assessing the experimental technique of scanning photocurrent microscopy as a means to investigate them. Solar cells are three-dimensional objects frequently modelled as being one-dimensional. However, for …
-
Characterization of tellurium back contact layer for CdTe thin film devices
… projected CdTe device efficiency, with the back contact being a main source of CdTe performance limitations. Tellurium (Te) applied as a back contact has led to significant increases in fill factor and an overall progress in device efficiency. Devices deposited with Te show significant …
-
Preparation Of Efficient Cuin1-xgaxse2-ysy/cds Thin-film Solar Cells By Optimizing The Molybdenum Back Contact And Using Diethylselenide as Selenium Precursor
… solar cells were prepared by optimizing the Mo back contact layer and optimizing the parameters for preparing CIGSS absorber layer using diethylselenide as selenium source. The Mo film was sputter deposited on 2.5 cm x 10 cm soda-lime glass using DC magnetron sputtering for studying the adhesion …
-
A study of the creation and characterization of nitrogen doped CuInSe2 (CIS:N), as a potential improved back contact material for CdTe and Cu(IN_xGA_1-x)Se2 photovoltaic cells
Nitrogen is incorporated into CuInSe2 (CIS), and other related materials, using a scalable, commonly used, technique. The growth characteristics, film morphology and electronic properties of these N doped materials, as it is affected by nitrogen, are studied, both in films grown with nitrogen, and …
-
Development Of Transparent And Conducting Back Contacts On Cds/cdte Solar Cells For Photoelectrochemical Application
… This research work focuses on developing various back contacts with good transparency in the infrared region (~750 - 1150 nm) for a CdS/CdTe solar cell. CdS/CdTe solar cells were prepared with three different configurations, Glass/SnO2:F/CdS/CdTe/ZnTe:Cu/ITO/Ni-Al (series 1), …
-
Study of deep level defects of N+-CdS/P-CdTe solar cells
… solar cells made with evaporated Cu as a primary back contact, are characterized by using the temperature dependence of the reverse bias diode current (J-V-T) to determine the energy levels of deep defects. The results of the J-V-T measurements on solar cells made at NJIT show that while modest …
-
Characterization Of Microstructural And Chemical Features In Cu-in-ga-se-s-based Thin-film Solar Cells
… (TEM). The present thesis aims to provide a feedback to these groups on their deposition processes to understand the correlations between processing, resulting microstructures, and the conversion efficiencies of these devices. Also, an optical equipment measuring photocurrents from a solar cell …
-
Zirconium nitride contacts for cadmium telluride solar cells
CdTe/CdS solar cells were produced with ZrN as a back contact by magnetron sputtering. ZrN films have been produced with crystalline quality and uniformity on CdTe. With good crystalline quality and uniformity on substrate materials, ZrN films have a low resistivity of 12.3 to 22.0 μΩ-cm, …
-
Spatially Resolved Charge Transport and Recombination in Metal-Halide Perovskite Films and Solar Cells
… explore charge transport by investigating a back-contact architecture for measurement. In collaboration with the Snaith group at Oxford, we develop a new architecture to isolate charge carriers. We prepare thin films of perovskite semiconductors over laterally-separated electron- and …
-
Solar Driven Photoelectrochemical Water Splitting For Hydrogen Generation Using Multiple Bandgap Tandem Of Cigs2 Pv Cells And Thin Film Photocatalyst
… Few solar cells developed on a molybdenum back contact and an ITO/MoS2 transparent conducting back contact showed a PV conversion efficiency of 7.93% and 5.97%, respectively. The solar cells developed on the ITO/MoS2 back contact form the first generation CIGS2/CdS thin film solar cells and …
-
Single crystal and polycrystalline copper indium selenide deposited by the hybrid sputtering and evaporation method for photovoltaic devices
… performance based on a novel adhesion-promoting back contact layer. Each of these impacts on the general problem of irreproducibility in production of high-performance CuInSe$\sb2$ solar cells.
-
Metal oxides as buffer layers in polycrystalline CdTe thin-film solar cells
… the front, or emitter, part of the cell and the back contact to the CdTe-based thin-film solar cells. The choice of an n-type emitter partner for CdTe based solar cells is crucial to the overall power conversion efficiency. In comparison to the traditional CdS emitter, metal oxides such as ZnO, …
-
Solution-processed doping in CdTe thin film solar cells
… films indicating less resistance through the back contact leading to an increase in power conversion efficiencies.
-
Field emission from carbon nanotubes deposited on platinum and nickel/nickel oxide multilayers
… studying the internal field emission between the back contact metal and the nanotubes, and the external field emission between the nanotubes and vacuum. Test devices of different work functions were fabricated from platinum and from nickel / nickel oxide. Nickel oxide was deposited by e-beam …
-
Interfacial engineering and alternative device architectures for perovskite photovoltaics
… to utility-scale solar cell deployment. All-back-contact (ABC) architectures, where both the selective contacts are micropatterned on one side of the absorber, represent untapped potential for higher efficiency perovskite PV devices by mitigating optical losses. In this thesis, ABC perovskite …
-
Development and Characterization of Inkjet-Printed Poly-Si Passivating Contacts for Silicon Solar Cells
… of polycrystalline silicon (poly_Si) passivating contacts, which consist of a doped poly_Si layer and an ultra_thin SiOx layer. This structure has driven the efficiency of crystalline silicon (c_Si) solar cells to exceed 26%. Further improvements can be achieved by incorporating localized poly_Si …
-
Development and Characterization of Inkjet-Printed Poly-Si Passivating Contacts for Silicon Solar Cells
… of polycrystalline silicon (poly_Si) passivating contacts, which consist of a doped poly_Si layer and an ultra_thin SiOx layer. This structure has driven the efficiency of crystalline silicon (c_Si) solar cells to exceed 26%. Further improvements can be achieved by incorporating localized poly_Si …
-
Stability Investigation of Silicon Nanowire Solar Cells
… the Silicon nanostructure's stability. The back contact and oxidation layer optimisation process have similarly been provided for investigation purposes. The RF plasma-enhanced chemical vapor deposition has been used at different temperatures to deposit silicon nanostructures which may be …
-
Preparation And Characterization Of Cigss Solar Cells And Pv Module Data Analysis
… to carry out automated sputter deposition of Mo back contact, CuGa, In metallic precursors on a soda lime glass substrate using a stepper motor control for better uniformity. Further, selenization/ sulfurization of these precursors was carried out using rapid thermal processing (RTP). CIGS films …
-
Application of Pulsed D.C. Magnetron sputtering deposition for the component layers of CuInSe2 thin film photovoltaic cells
… typical CIS based cell consists of a molybdenum back contact layer, aCIS absorber layer, a cadmium sulphide buffer layer and a zinc oxide top layer. In this study,toxic cadmium sulphide was replaced by indium sulphide and the top layer employed indiumoxide which could be changed from intrinsic to …
Page 1 of 2