An Improved Method for Preparation of CdS Particle-Dispersing Film with Excellent Light-Induced Current Generation

Abstract

A homogeneously CdS particle-dispersing film was obtained according to the counter-current method by which Cd2+ and H2S were incorporated into Nafion film from an opposite side in a counter-current diffusion way. The resulting film had a light-induced current in an order of μA cm−2 with a ratio of current in light to dark around 430.

Beyond Photovoltaics: Semiconductor Nanoarchitectures for Liquid-Junction Solar Cells

“…Sol−gel techniques have proven useful in the development of nanostructured semiconductor membranes with either 2-D or 3-D configurations. ,− Organic template mediated synthesis has been employed to develop nanoporous tin sulfide materials . Other methods of producing nanostructured electrode materials include preparation of semiconductor nanoclusters in polymer films ,− and Langmuir−Blodgett films. − …”

“…84,[180][181][182][183][184] Organic template mediated synthesis has been employed to develop nanoporous tin sulfide materials. 185 Other methods of producing nanostructured electrode materials include preparation of semiconductor nanoclusters in polymer films 62,[186][187][188][189][190][191][192][193][194][195][196] and Langmuir-Blodgett films. [197][198][199][200][201] This simple approach of arranging preformed metal oxide colloids on a desired surface produces a thin semiconductor film with excellent stability in both acidic and alkaline media (pH range 1-13).…”

Photoinduced charge transfer processes in ultrasmall semiconductor clusters. Photophysical properties of CdS clusters in Nafion membrane

“…It should also be possible to utilize such thin semiconductor particulate films in photoelectroehemical cells for directly converting light energy into electricity. Significantly higher photocurrents have been reported for larger size CdS particles precipitated from solution in Nation films (Honda et al 1988). We also checked this effect for quantized CdS particles by casting the film on a conducting glass electrode using Nation solution (5% in alcohol, Aldrich).…”

“…Semiconductor particles which exhibit size-dependent optical and electronic properties are termed quantized (or Q-) particles or nanoclusters (Meisner et al 1983;Kuczynski et al 1984;Wang and Mahler 1987;Honda et al 1988;Mahler 1988;Nosaka et al 1989;Dalas et al 1990;Gopidas and Kamat 1990;Miyoshi et al 1990;Smotkin et al 1990;Misawa et al 1991;Yoneyama 1991). These ultrasmall semiconductor particles are molecular clusters in which complete electron delocalization has not yet occurred.…”

“…Microencagement of semiconductor particles in an organized medium controls not only the morphology but also the photocatalytic properties of the semiconductors. For example, metal chalcogenide clusters can easily be synthesized in a polymer film (Meisner et al 1983;Kuczynski et al 1984;Wang and Mahler 1987;Mahler 1988;Honda et al 1988;Nosaka et al 1989;Dalas et al 1990;Gopidas and Kamat 1990;Miyoshi et a11990;Smotkin et a11990;Misawa et a11991;Yoneyama 1991). Such preparations provide isolated small semiconductor particles which are stabilized in an organized medium.…”