Nanoporous photocathode and photoanode made by multilayer assembly of quantum dots

被引：34

作者：

Hojeij, Mohamad ^{[1
]}

Su, Bin ^{[1
]}

Tan, Shuxin ^{[1
]}

Meriguet, Guillaume ^{[1
]}

Girault, Hubert H. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Electrochim Phys & Analyt, CH-1015 Lausanne, Switzerland

来源：

ACS NANO | 2008年 / 2卷 / 05期

关键词：

layer-by-layer; CdSe; CdSe@CdS; thin films; photocurrent; photoanode; photocathode;

D O I：

10.1021/nn700295v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We perform in this paper a kinetic study of the photoelectrochemical responses of nanoporous thin photoactive films. The films were fabricated by by a layer-by-layer assembly of positively charged polyelectrolytes (poly-L-Lysine, pLys) and negatively charged semiconductor nanoparticles (NPs) on a carboxylic acid terminated alkanethiol-modified gold electrode. Two types of NPs were used to build uniform films: cadmium selenide (CdSe) and cadmium selenide/cadmium sulfide core/shell (CdSe@CdS). Large photocathodic and photoanodic currents were recorded for CdSe and CdSe@CdS sensitized films, respectively. A theoretical model of the photocurrent responses was developed to analyze the kinetics of photoinduced processes and coupled reactions, showing that the multilayer films behave as homogeneous nanoporous semiconducting photoelectrodes.

引用

页码：984 / 992

页数：9

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