The interest in quantum dot sensitized solar cells (QDSSC), which has theoretically proved to have up 44% energy conversion efficiency recent years, is growing rapidly. Although it high value, PCE obtained studies with QDSSCs far from these values. This situation shows that there are many difficulties be solved QDSSC technology. One of the main challenges technology irradiated load recombinatio...

Here we report the preparation of high performance Quantum Dot Sensitized Solar Cells (QDSCs) based on PbS-CdS co-sensitized nanoporous TiO2 electrodes. QDs were directly grown on the TiO2 mesostructure by the Successive Ionic Layer Absorption and Reaction (SILAR) technique. This method is characterized by a fast deposition rate which involves random crystal growth and poor control of the defec...

The most efficient catalysts for solar fuel production should operate close to reversible potentials, yet possess a bias for the fuel-forming direction. Protein film electrochemical studies of Ni-containing carbon monoxide dehydrogenase and [NiFeSe]-hydrogenase, each a reversible electrocatalyst, show that the electronic state of the electrode strongly biases the direction of electrocatalysis o...

It has long been a puzzle that the Raman optical modes shift to lower frequency or termed optical mode softening or redshift associated with the creation of Raman acoustic modes that shift to higher energy or called acoustic hardening or blueshift upon a nanosolid being formed and its size being reduced. Understandings of the mechanism behind the size-induced Raman shifts have been quite contro...

Advances in the size1 and shape2 control of solution-grown nanocrystals have driven recent interest in the development of welldefined multicomponent nanostructures. Composition control, through the incorporation of two or more distinct nanostructured components, represents an effective approach to tailoring the chemical and physical properties of nanocrystals. The resulting hybrid structures of...

Spectral sensitization by metal-free phthalocyanine (H2Pc) films was observed on various semiconductor electrodes (single-crystal n-TiO2, n-SrTi03, n-WO3, n-ZnO, n-CdS, n-CdSe, n-Si, and n-Gap; Sn02 conducting glass). The spectral response of the sensitized photocurrent was generally the same as the absorption spectrum of the phthalocyanine. The rather thick (400 8, to 1 pm) H2Pc films showed b...

Now safety concern of in vivo nano-carriers toxicity is apparently hindering the extensive applications of nanotechnology in medical sciences. Many studies on the effects of nanomaterials in vitro and in vivo have been published, and revealed that nanomaterials including carbon nanotubes, fullerenes, quantum dots (for example CdS) and oxide nanoparticles (NPs) (for example ZnO, CuO and TiO2) ex...

Dye-sensitized solar cell (DSSC) has attracted wide attention for the potential application to convert sunlight into electricity. Organic dyes blended with TiO2 nanoparticles (NPs) have been recognized as important light harvesting materials especially in the visible spectral range (Hara et al., 2002; Bisquert et al., 2002; Gratzel, 2001; Ferrere & Gregg, 2001; Hagfeldt & Gratzel, 2000; Cahen e...

A non-enzymatic photoelectrochemical detection of aqueous sulfide and ascorbic acid, using an CdS $\vert $ TiO2 nanotubes photoanode, is presented. Its performance compared with a Pt photoanode. Both the electrodes show high sensitivi...