Power-conversion efficiency

It is used as a fluorinating reagent in semiconductor doping, to synthesi2e some hexafluoroarsenate compounds, and in the manufacture of graphite intercalated compounds (10) (see Semiconductors). AsF has been used to achieve >8% total area simulated air-mass 1 power conversion efficiencies in Si p-n junction solar cells (11) (see Solarenergy). It is commercially produced, but usage is estimated to be less than 100 kg/yr. 

Power Supply Cookbook, Second Edition has been updated with the latest advances in the field of efficient power conversion. Efficiencies of between 80 to 95 percent are now possible using these new techniques. The major losses within the switching power supply and the modern techniques to reduce them are discussed at length. These include synchronous rectification, lossless snubbers, and active clamps. The information on methods of control, noise control, and optimum printed circuit board layout has also been updated. 

Calculation of the power conversion efficiency t]e was performed using the relation... 

Comparison of the spectral response and of the power efficiency of these first conjugated polymer/fullerene bilayer devices with single layer pure conjugated polymer devices showed that the large potential of the photoinduced charge transfer of a donor-acceptor system was not fully exploited in the bilayers. The devices still suffer from antibatic behavior as well as from a low power conversion efficiency. However, the diode behavior, i.e. the rectification of these devices, was excellent. 

Recently, uniform Filins with high concentrations of Cwl were cast from 1,2-dichlorobenzene solutions containing up to 1 4 weight ratio MEH-PPV [110]. For devices made from these high concentration blends, charge collection efficiencies around //,.=26% (electron/incident photon) and power conversion efficiencies around tjc-2.5% (electrical power out/incident light power) have been realized. 

SA VanSlyke and CW Tang, Organic Electroluminescent Devices Having Improved Power Conversion Efficiencies, U.S. Patent 4,539,507, September 3, 1985. 

Organic electroluminescent devices having improved power conversion efficiencies... 

C.E. Byvik, A.M. Buoncristiani, B.T. Smith, Limits to solar power conversion efficiency with applications to quantum and thermal systems, J. Energy 7 (1983) 581-588. 

Another effect involves charge transport resistivity at the semiconductor-semi-conductor interface. The charge transport of the Ti02 photoelectrode, limited by its poor conductivity (about 0.1 cm2 V-1 s-1) [94], is the rate-determining step for the power-conversion efficiency in DSSCs [95]. As mention above, an usual strategy to improve charge transport is to add CNTs to the DSSC photoelectrode. It could be expected that the effect is proportional to the conductivity of the CNT, but Guai et al. 

Production of a two-layer film made out of copper phthalocyanine and a perylene tetracarboxylic derivative. A power conversion efficiency of about 1% has been achieved. 

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