Infotech Oulu Doctoral Program
Thin Film Solar Cells
Lecturer: Professor Arthur Hill, Faculty of Science Engineering and Environment, University of Salford, Salford, UK
Date: Wednesday, April 10, 2013 – Friday April 12, 2013
(3x3 hours lectures)
The course gives a general introduction to the subject of photovoltaic cells with emphasis on thin film cells. Different cell structures and materials are compared. The advantages of thin chalcopyrite cells such as copper indium/gallium diselenide (CIGS) cells are discussed with reference to their efficiency, light absorption and ability to withstand radiation. The crystalline properties and relevant methods of deposition are described with emphasis on pulsed DC magnetron sputtered films. Interest in kesterite-based cells is prompted by the world shortage of indium and gallium.
Lecture 1. Photovoltaic Materials and Solar Cells.
Energy and sunlight. Types of solar cell. CIS and CIGS. Material properties of CIS – crystal structure, density, optical absorption, radiation hardness. CIS cell performance in space. The stoichiometry triangle. Electrical conductivity related to defect structure. The CIS phase diagram. Solar cell characteristics.
Lecture 2. Cell Structure and Deposition Methods
Basic thin film cell structure – back contact, absorber and window layers. Deposition of CIS/CIGS thin films by co-evaporation or sputtering. Fabrication of CIS starting materials for single crystal growth or sputtering. Magnetron sputtering basics. Pulsed DC magnetron sputtering (PDMS).
Lecture 3. Film Characteristics, Commercial Arrays and Future Materials
Analysis of PDMS deposited films for solar cell fabrication - CIS, CIGS, Mo, In2S3, and In2O3. Potential limitations on CIS/CIGS devices caused by shortage of indium and gallium. Kesterites such as CZTS as alternatives to chalcopyrite thin film solar cell materials. Commercially available thin film solar panels. Capital cost and energy pay-back times. Conclusions.
More information: Antti Uusimäki
Last updated: 13.9.2013