Download PDF by Mary D. Archer, Robert Hill: Clean Electricity from Photovoltaics

By Mary D. Archer, Robert Hill

ISBN-10: 1860941613

ISBN-13: 9781860941610

Photovoltaic cells offer fresh, reversible electricity from the solar. made of semiconductors, they're sturdy, silent in operation and freed from polluting emissions. during this e-book, specialists from all sectors of the PV neighborhood - fabrics scientists, physicists, creation engineers, economists and environmentalists - supply their severe value determinations of the place the know-how is now and what its customers are.

Two pattern chapters - (a) Crystalline Silicon sun Cells and (b) Photovoltaic Modules, structures and functions are actually to be had on-line.

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Extra resources for Clean Electricity from Photovoltaics

Sample text

Shown in Fig. 9a, consisting respectively of photogenerated electrons drifting from the p to the n side of the junction and photogenerated holes drifting the other way. The sum of the two is the overall photocurrent /^. The photocurrent is directly proportional to the absorbed photon flux but independent of bias (provided that the junction field is always high enough to sweep carriers across the junction). At open circuit (Fig. 9a), no current is drawn from the cell and the photocurrent must be balanced by the recombination current.

The PV market is now expanding past this level, so new entrants in the field must seek new sources of silicon feedstock. Despite their longevity, reliability and environmental compatibility, crystalline silicon cells remain relatively complex and heavy devices with significant materials and fabrication costs. One drawback of Si is its relatively poor light absorption, which means that unsophisticated cells must be at least 250 pm thick to absorb all the active wavelengths in sunlight with reasonable efficiency.

SIJ (1998), Solar Industry Journal, Vol. 9, No. 1. Smith W. (1873), 'The action of light on selenium', J. Soc. Telegraph Engineers 2, 31-33. , Starkiewicz J. and Simpson O. (1947), 'Lead sulfide photoconductive cells', Nature 159, 818-9. Spear W. E. and Le Comber P. G. (1975), 'Substitutional doping of amorphous silicon', Solid State Commun. 17, 1193-1196. , Shay J. , Migliorato P. and Kasper H. M. (1974), 'CuInSe2/CdS heterojunction photovoltaic detectors', Appl. Phys. Lett. 25, 434-435. Welker H.

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Clean Electricity from Photovoltaics by Mary D. Archer, Robert Hill

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