Essays about: "thickness of a thin film"

Showing result 16 - 20 of 45 essays containing the words thickness of a thin film.

1. 16. A comparative study of ZnO i-layer deposited with ALD and PVD for CIGS solar cells

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Joel Johansson Byberg; [2019]
   Keywords : CIGS; ZnO; ZnMgO; solar cells; thin film; zinc oxide; window layer; ALD; PVD;

   Abstract : Two identified setbacks for CIGS based devices in order to obtain higher efficiency are parasitic absorption in the window layer structure and losses in open-circuit voltage due to bad interfaces. This study investigated how the performance of the solar cell is affected by depositing intrinsic ZnO (i-ZnO) and ZnMgO with atomic layer deposition (ALD) instead of the conventional sputtering. READ MORE

3. 17. Model of Thermal EHL Based on Navier-Stokes Equations : Effects of Asperities and Extreme Loads

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Marko Tošić; [2019]
   Keywords : ;

   Abstract : A common approach in numerical studies of elastohydrodynamic lubrication (EHL) is based on solving the Reynolds equation that governs pressure distribution in thin lubricant films. The Reynolds equation is derived from the Navier-Stokes equations by taking assumptions that are considered valid when the thickness of the lubricant film is much smaller than its length. READ MORE

4. 18. Investigation of Metallic Dust formed on Steel Substrates in Solar Cell Sputtering Chambers

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Jakob Friberg; [2019]
   Keywords : Sputtering; iron selenide; CIGS; solar cell; dust;

   Abstract : Investigations have been done as of why dust particles appear in a circular pattern on the backside of solar cells produced in sputtering chambers at Midsummer AB. An experimental approach was conducted, where solar cells were produced at standard conditions and their backside studied by material analytical methods. READ MORE

5. 19. Processing of Sub-micrometer Features for Rear Contact Passivation Layer of Ultrathin Film Solar Cells Using Optical Lithography

   University essay from

   Author : Evelina Roxner; Ronja Olsmats Baumeister; [2019]
   Keywords : nanofabrication; optical lithography; photo lithography; line contacts; microfabrication; rear contact passivation; passivation layer; sub-micrometer features; thin film; ultra-thin film; solar cells; CIGS; aluminiumoxide;

   Abstract : Thin film copper, indium, gallium, selenide (CIGS) solar cells are promising in the field of photovoltaic technology. To reduce material and fabrication cost, as well as increasing electrical properties of the cell, research is ongoing towards ultra-thin film solar cells (absorption layer thickness less than 500 nm). READ MORE

6. 20. Growth and Characterization of CrB2/TiB2 Superlattices by Magnetron Sputtering

   University essay from Linköpings universitet/Tunnfilmsfysik; Linköpings universitet/Tekniska fakulteten

   Author : Samira Dorri; [2019]
   Keywords : Thin films; diborides; superlattices; reflectivity; transition-metal diborides; CrB2; TiB2;

   Abstract : In the present work, growth and structural characterization of CrB2/TiB2 superlattices on (0001) Al2O3 substrate is studied. The superlattices are grown using a direct current magnetron sputtering (DCMS) system with a base pressure of <9E-7 Torr. READ MORE