Effect of Sodium and Absorber Thickness on CIGS2 Thin Film Solar Cells
Title | Effect of Sodium and Absorber Thickness on CIGS2 Thin Film Solar Cells PDF eBook |
Author | Parag S. Vasekar |
Publisher | |
Pages | 98 |
Release | 2009 |
Genre | Solar cells |
ISBN |
This work presents a study of morphology and device properties of CIGS2 thin films with Copper-deficient absorbers after minute amounts of sodium are introduced on the Mo-coated substrate in the form of sodium fluoride layer prior to sputter deposition of copper-gallium alloy and indium. Photovoltaic conversion efficiency of 9.15% was obtained for copper-deficient absorbers. In a parallel set of experiments, copper-rich precursors were used to produce absorbers of lower thickness range values and the parameters were optimized. Photovoltaic conversion efficiency of 10.12% was obtained for an absorber of thickness 1.5 [micrometers] and an efficiency of 9.62% was obtained for an absorber of thickness 1.2 [micrometers].
Optimization of Process Parameters for Reduced Thickness CIGSeS Thin Film Solar Cells
Title | Optimization of Process Parameters for Reduced Thickness CIGSeS Thin Film Solar Cells PDF eBook |
Author | Shirish A. Pethe |
Publisher | |
Pages | 116 |
Release | 2010 |
Genre | Copper indium selenide |
ISBN |
With further optimization of the reaction process of the absorber layer as well as the other layers higher efficiencies can be achieved. The effect of sodium on the device performance is experimentally verified in this work. To the best of our knowledge the detrimental effect of excess sodium has been verified by experimental data and effort has been made to correlate the variation in PV parameter to theoretical models of effect of sodium. It has been a regular practice to deposit thin barrier layer prior to molybdenum deposition to reduce the micrononuniformities caused due to nonuniform out diffusion of sodium from the soda lime glass. However, it was proven in this work that an optimally thick barrier layer is necessary to reduce the out diffusion of sodium to negligible quantities and thus reduce the micrononuniformities. Molybdenum back contact deposition is a bottleneck in high volume manufacturing due to the current state of art where multi layer molybdenum film needs to be deposited to achieve the required properties. In order to understand and solve this problem experiments were carried out. The effect of working distance (distance between the target and the substrate) on film properties was studied and is presented in this work. During the course of this work efforts were taken to carry out a systematic and detailed study of some of the fundamental issues related to CIGS technology and particular for high volume manufacturing of CIGS PV modules and lay a good foundation for further improvement of PV performance of CIGS thin film solar cells prepared by the two step process of selenization and sulfurization of sputtered metallic precursors.
2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)
Title | 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC) PDF eBook |
Author | IEEE Staff |
Publisher | |
Pages | |
Release | 2016-06-05 |
Genre | |
ISBN | 9781509027255 |
scientific and engineering technical conference covering all aspects of photovoltaics materials, devices, systems and reliability
Investigation of Sodium Effects on CIGS Thin Film Solar Cells by Electrical and Material Characterization
Title | Investigation of Sodium Effects on CIGS Thin Film Solar Cells by Electrical and Material Characterization PDF eBook |
Author | |
Publisher | |
Pages | |
Release | 2013 |
Genre | |
ISBN |
Effect of Heat Treatments and Reduced Absorber Layer Thickness on Cu(in, Ga)se2 Thin Film Solar Cells
Title | Effect of Heat Treatments and Reduced Absorber Layer Thickness on Cu(in, Ga)se2 Thin Film Solar Cells PDF eBook |
Author | Vinodh Chandrasekaran |
Publisher | |
Pages | |
Release | 2005 |
Genre | |
ISBN |
The thickness of the Molybdenum back contact layer was increased to see if the amount of Sodium from the substrate had any effect on the device performance. The Ga/In ratio was altered and its effect was also studied. The 0.65um thick devices showed a large reduction in Voc̕s and Jsc̕s. The effect of Selenization time and Selenium flux during Selenization were studied at each of the different thicknesses.
Thin Film Solar Cells
Title | Thin Film Solar Cells PDF eBook |
Author | Jef Poortmans |
Publisher | John Wiley & Sons |
Pages | 504 |
Release | 2006-10-16 |
Genre | Science |
ISBN | 0470091266 |
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.
Solar Cells
Title | Solar Cells PDF eBook |
Author | Ahmed Mourtada Elseman |
Publisher | BoD – Books on Demand |
Pages | 489 |
Release | 2021-09-22 |
Genre | Technology & Engineering |
ISBN | 1838810161 |
Solar cell energy is the single most pressing issue facing humanity, with a more technologically advanced society requiring better energy resources. This book discusses technologies broadly, depending on how they capture and distribute solar energy or convert it into solar power. The major areas covered in this book are: • The theory of solar cells, which explains the conversion of light energy in photons into electric current. The theoretical studies are practical because they predict the fundamental limits of a solar cell. • The design and development of thin-film technology-based solar cells. • State of the art for bulk material applied for solar cells based on crystalline silicon (c-Si), also known as “solar grade silicon,” and emerging photovoltaics.