By I M Dharmadasa

This booklet concentrates at the most recent advancements in our realizing of solid-state machine physics. the cloth awarded is especially experimental and according to CdTe thin-film sun cells. It extends those new findings to CIGS thin-film sun cells and provides a brand new equipment layout according to graded bandgap multilayer sunlight cells. This layout has been experimentally verified utilizing the well-researched GaAs/AlGaAs procedure and preliminary units have proven outstanding gadget parameters. those units are in a position to soaking up all radiation (UV, seen, and infra-red) in the sun spectrum and combines "impact ionization" and "impurity photovoltaic" results. the enhanced gadget realizing awarded during this publication should still impression and consultant destiny equipment layout and inexpensive thin-film sunlight panel manufacture.

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As indicated in Fig. 8, the Schottky barrier represents approximately half of a p-n junction and, hence, a lower φb . This disadvantage can be removed by incorporating an insulating layer, as shown in Fig. 9. The suitably thin insulating layer decouples the metal from the semiconductor and increases the band bending or the potential barrier at the interface. The rectification property of this structure improves, and the interface behaviour is described by Eq. 3) where χ , in electron volts, is the mean barrier height presented by ˚ ¨ the interfacial layer of thickness, δ, in Angstroms (A).

A. Moore (2005) Solid State Chemistry: An Introduction, 3rd edn, Taylor & Francis Group. 10. S. M. Sze and K. K. Ng (2007) Physics of Semiconductor Devices, John Wiley & Sons. 11. J. Singh (2001) Semiconductor Devices: Basic Principles, John Wiley & Sons. 23 July 27, 2012 17:5 PSP Book - 9in x 6in 24 Photovoltaic Solar Energy Conversion 12. S. O. Kasap (2001) Optoelectronics and Photonics; Principles & Practices, Prentice Hall. 13. E. H. Rhoderick and R. H. Williams (1988) Metal-Semiconductor Contacts, 2nd edn, Oxford Science Publications.

Moore (2005) Solid State Chemistry: An Introduction, 3rd edn, Taylor & Francis Group. 10. S. M. Sze and K. K. Ng (2007) Physics of Semiconductor Devices, John Wiley & Sons. 11. J. Singh (2001) Semiconductor Devices: Basic Principles, John Wiley & Sons. 23 July 27, 2012 17:5 PSP Book - 9in x 6in 24 Photovoltaic Solar Energy Conversion 12. S. O. Kasap (2001) Optoelectronics and Photonics; Principles & Practices, Prentice Hall. 13. E. H. Rhoderick and R. H. Williams (1988) Metal-Semiconductor Contacts, 2nd edn, Oxford Science Publications.

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