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Science 17 April 1998:
Vol. 280. no. 5362, pp. 425 - 427
DOI: 10.1126/science.280.5362.425
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Reports

A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting

Oscar Khaselev, John A. Turner *

Direct water electrolysis was achieved with a novel, integrated, monolithic photoelectrochemical-photovoltaic design. This photoelectrochemical cell, which is voltage biased with an integrated photovoltaic device, splits water directly upon illumination; light is the only energy input. The hydrogen production efficiency of this system, based on the short-circuit current and the lower heating value of hydrogen, is 12.4 percent.

National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401-3393, USA.
*   To whom correspondence should be addressed. E-mail: jturner{at}nrel.gov

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Science. ISSN 0036-8075 (print), 1095-9203 (online)