NDLI: Basic principles of solar cells and the possible impact of nano-structures

Content Provider	IEEE Xplore Digital Library
Author	Wurfel, P.
Copyright Year	2003
Description	Author affiliation: Inst. fur Angewandte Phys., Karlsruhe Univ., Germany (Wurfel, P.)
Abstract	The generation of electrons and holes by illumination and their subsequent thermalisation establishes different Fermi-distributions for the electrons in different energy ranges of a semiconducting absorber. As a consequence, chemical energy showing up as the difference of Fermi-energies is produced per electron-hole pair. The transformation of chemical into electrical energy requires a structure, the solar cell, in which semi-permeable membranes allow for selective transport of electrons and holes to different electrodes. With nano-structures as in the dye-cell, absorbers with very poor transport properties can be employed. While two-band systems are bounded by the Shockley-Queisser efficiency limit, higher efficiencies are possible for systems with more than 2 different Fermi-distributions. Examples like intermediate band structures, up- and down-converters or hot electron cells may heavily rely on the properties of nano-structures.
Starting Page	2672
Ending Page	2675
File Size	314925
Page Count	4
File Format	PDF
ISBN	4990181603
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-11
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	PVSEC Advisory Committee
Subject Keyword	Photovoltaic cells Heat engines Chemicals Entropy Solar power generation Charge carrier processes Temperature Electrons Solar heating Cooling
Content Type	Text
Resource Type	Article

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