Download Amorphous and Microcrystalline Silicon Solar Cells: by Ruud E.I. Schropp, Miro Zeman PDF

By Ruud E.I. Schropp, Miro Zeman

Amorphous silicon sun cellphone know-how has developed significantly because the first amorphous silicon sunlight cells have been made at RCA Laboratories in 1974. Scien­ tists operating in a couple of laboratories around the globe have constructed more suitable alloys according to hydrogenated amorphous silicon and microcrystalline silicon. different scientists have built new equipment for starting to be those skinny movies whereas but others have constructed new photovoltaic (PV) equipment constructions with im­ proved conversion efficiencies. within the final years, a number of businesses have developed multi-megawatt production crops which can produce large-area, multijunction amorphous silicon PV modules. more and more humans be­ lieve that thin-film photovoltaics should be built-in into constructions on a wide scale within the following couple of a long time and may manage to make an incredible contribution to the world's strength wishes. during this booklet, Ruud E. I. Schropp and Miro Zeman offer an authoritative review of the present prestige of skinny movie sun cells according to amorphous and microcrystalline silicon. They evaluation the numerous advancements that experience happened throughout the evolution of the know-how and in addition speak about the main im­ portant fresh strategies within the deposition of the fabrics, the certainty of the physics, and the fabrication and modeling of the devices.

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Extra resources for Amorphous and Microcrystalline Silicon Solar Cells: Modeling, Materials and Device Technology

Example text

1997). A drawback of hydrogen dilution is the decreased deposition rate, but this is unavoidable as the enhanced network reconstruction either by etching or by growth zone reconstruction does take time. Hydrogen dilution also avoids depletion of the silane. This is particularly helpful in large area deposition, 22 AMORPHOUS AND MICROCRYSTALLINE SILICON SOLAR CELLS where heavily depleted silane would otherwise start forming dust or where depletion would lead to nonuniform thickness of the deposited films.

K. I. Schropp, Transistors with a profiled active layer made by hot-wire CVD, in: Amorphous and Microcrystalline Silicon Technology - 1998, edited by R Schropp, H. Branz, S. Wagner, M. Hack, and I. Shimizu, Materials Research Society Symp. Proc. 507 (1998) in print. R, J. Guillet, J. Perrin, A. Lloret and E. Bourree, Hot-wire chemical vapour deposition of polycrystalline silicon films, Proceedings of the 13th EC Photovoltaic Solar Energy Conference, edited by W. Freiesleben, W. A. Ossenbrink, and P.

The minimum set of characteristic parameters that should be determined to qualify intrinsic hydrogenated amorphous silicon for use in p-i-n type solar cells 42 AMORPHOUS AND MICROCRYSTALLINE SILICON SOLAR CELLS consists of the dark conductivity O"d, the photoconductivity O"ph, the optical band gap E g , and the activation energy EA of the dark conductivity. The absorption coefficients at the wavelengths of 400 nm and 600 nm are also useful to specify the quality of the material. Additional parameters are the midgap electronic density of states and the hydrogen bonding structure parameters as obtained from infrared (IR) absorption spectra.

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