Gibbons, James F. and Cogan, George W. and Gronet, Chris M. and Lewis, Nathan S. (1984) A 14% efficient nonaqueous semiconductor/liquid junction solar cell. Applied Physics Letters, 45 (10). pp. 1095-1097. ISSN 0003-6951 http://resolver.caltech.edu/CaltechAUTHORS:20120702-100148444
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We describe the most efficient semiconductor/liquid junction solar cell reported to date. Under W‐halogen (ELH) illumination, the device is a 14% efficient two‐electrode solar cell fabricated from an n‐type silicon photoanode in contact with a nonaqueous electrolyte solution. The cell′s central feature is an ultrathin electrolyte layer which simultaneously reduces losses which result from electrode polarization, electrolyte light absorption, and electrolyte resistance. The thin electrolyte layer also eliminates the need for forced convection of the redox couple and allows for precise control over the amount of water (and other electrolyte impurities) exposed to the semiconductor. After one month of continuous operation under ELH light at 100 mW/cm^2, which corresponds to the passage of over 70 000 C/cm^2, thin‐layer cells retained over 90% of their efficiency. In addition, when made with Wacker Silso cast polycrystalline Si, cells yield an efficiency of 9.8% under simulated AMl illumination. The thin‐layer cells employ no external compensation yet surpass their corresponding experimental (three‐electrode) predecessors in efficiency.
|Additional Information:||© 1984 American Institute of Physics. Received 20 July 1984; accepted 21 August 1984. We thank F. C. Wu, G. R. Moddel, L.A. Christel, J. T. Merchant, J. S. Olson, and R. Redse of SERA Solar Corp. and C. M. Lieber of Stanford University for valuable contributions to this work.|
|Subject Keywords:||EFFICIENCY, FABRICATION, ELECTRODES, OPERATION, SILICON SOLAR CELLS, SILICON, ELECTROLYTES, AQUEOUS SOLUTIONS, SOLVENTS, DESIGN, EXPERIMENTAL DATA, SEMICONDUCTOR−ELECTROLYTIC CON|
|Classification Code:||PACS: 84.60.Jt, 72.40.+w, 73.40.Mr, 82.47.-a|
|Official Citation:||A 14% efficient nonaqueous semiconductor/liquid junction solar cell James F. Gibbons, George W. Cogan, Chris M. Gronet, and Nathan S. Lewis Appl. Phys. Lett. 45, 1095 (1984); http://dx.doi.org/10.1063/1.95028|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||02 Jul 2012 18:26|
|Last Modified:||26 Dec 2012 15:27|
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