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

By Ruud E.I. Schropp, Miro Zeman

Amorphous silicon sunlight mobilephone expertise has developed significantly because the first amorphous silicon sun cells have been made at RCA Laboratories in 1974. Scien­ tists operating in a few laboratories around the world have built greater alloys in line with hydrogenated amorphous silicon and microcrystalline silicon. different scientists have built new tools for growing to be those skinny motion pictures whereas but others have constructed new photovoltaic (PV) machine constructions with im­ proved conversion efficiencies. within the final years, a number of businesses have developed multi-megawatt production crops that may produce large-area, multijunction amorphous silicon PV modules. increasingly more humans be­ lieve that thin-film photovoltaics may be built-in into structures on a wide scale within the following few many years and should be capable of make a massive contribution to the world's power wishes. during this publication, Ruud E. I. Schropp and Miro Zeman offer an authoritative evaluation of the present prestige of skinny movie sunlight cells in line with amorphous and microcrystalline silicon. They assessment the numerous advancements that experience happened through the evolution of the know-how and in addition speak about the main im­ portant contemporary 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 info for Amorphous and Microcrystalline Silicon Solar Cells: Modeling, Materials and Device Technology

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Anderson and B. Wacker, Transition from amorphous to crystalline silicon: effect of hydrogen on film growth, in: Amorphous Silicon Technology, edited by A. J. C. G. LeComber, and Y. Hamakawa, Materials Research Society Symp. Proc. 118 (1988) 49-54. A. Sarrott, S. Rambert, and E. Taglauer, Surface hydrogen content and passivation of silicon deposited by plasma induced chemical vapor deposition from silane and the implications for the reaction mechanism, J. Vac. Sci. Technol. A 7 (1989) 2614-2624.

1989). The value of 16 eV might however be underestimating the critical value for the case of a-Si:H deposition, as defects due to ion impact still have a chance to recover due to subsurface silicon matrix relaxation (Fig. 1). , 1992 estimated the peak ion energy for silicon ions as a function of the exitation frequency, see Fig. 3, and showed that an excitation frequency larger than 50 MHz prevents the occurrence of Si ions with energies higher than the above-mentioned threshold. , 1998 showed that the ion bombardment could be quantified by introducing the kinetic ion energy per deposited silicon atom.

25 cm2), however no stability data were reported for this cell thus far. , 1998). It is not known which rf frequency was used during plasma deposition of this cell. A drawback of the microcrystalline intrinsic layer is the low deposition rate of 1 - 2 A/s, especially since this layer has to be made rather thick compared to the intrinsic layer of an amorphous solar cell. , 1997a). , 1996). The application of VHFCVD in the mass production of large area solar panels with either amorphous or microcrystalline components might be limited due to the finite wavelength>.

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