Nathan S. Lewis

TL;DR: In this article, the excited-state reactivity behavior of (Rh/sub 2/(bridge)/sub 4/)/sup 2 +/ (bridge = 1,3-diisocyanopropane) was investigated.

Abstract: A quantitative analysis of the theoretical value for the open‐circuit photovoltage, , of a semiconductor/liquid junction reveals that control of bulk carrier transport properties is crucial to interpreting the observables at the semiconductor/liquid interface. Use of characterized semiconductor samples yields quantitative agreement between the maximum theoretical and experimentally observed values for both n‐Si and p‐Si surfaces in nonaqueous solvents. This accord between theory and experiment rules out deleterious effects of charged surface states on the of these interfaces. Lower than ideal values in other systems might reflect poor diffusion lengths in the semiconductor, classical tunneling over the barrier, or the effects of surface states. The observation of large photovoltages from n‐ and p‐type‐based semiconductor interfaces (n‐Si, p‐Si, , ) in the same solvent is used to rule out a fixed density of charged surface states as the mechanism for obtaining constant photovoltages at these junctions. Direct support for this interpretation is obtained by techniques which verify the presence of mobile surface charge on p‐type Si cathode surfaces in the inversion condition. Thus, control and investigation of bulk semiconductor properties that has been eminently significant to the understanding of p‐n junction solar cells is also crucial to developing a rational understanding of the observables at the semiconductor/liquid interface.

TL;DR: A commercially available bipolar membrane that can maintain a steady-state pH difference between the sites of oxidation and reduction in membrane-supported, solar-driven water-splitting systems without changing the overall thermodynamics required to split water has been identified and its performance has been evaluated quantitatively.

TL;DR: Osmium polypyridyl complexes were used as sensitizers in solar cells that utilize nanocrystalline titanium dioxide photoelectrodes as discussed by the authors, which provided very high external quantum yields for photocurrent flow and produced open-circuit voltages similar to those of the Ru complex.

TL;DR: In this paper, the enhancement of photoluminescence emission from silicon quantum dots in the near field of cylindrical silver particles has been calculated using finite integration techniques, which permitted a quantitative examination of the plasmon resonance frequencies and locally enhanced fields surrounding coupled arrays of silver particles having arbitrary shapes and finite sizes.