In this paper, we report on the design, redox potentials, excited state energies and radical ion pair state energies in electron donor-acceptor conjugates comprising the electron-donating π-extended tetrathiafulvalene and several electron-accepting fullerenes. To this end, we contrast an empty fullerene, that is, C₆₀, with two endohedral metallofullerenes, that is, open-shell La@C₈₂ and closed-...

Since the demonstration of efficient hybrid photovoltaic devices using CdSe/P3HT, a number of different QD/polymer molecular solar cells have been investigated. However, considerably less attention has been paid to the photo-induced processes occurring in these devices, in particular the strong dependence that device efficiencies show upon QD concentration. This study aims to shed more light on...

Inorganic−organic hybrid materials based on silicon quantum dots (SiQDs) have been utilized for photovoltaic applications but suffer from rapid charge recombination and low carrier mobility. We present an ab initio investigation of charge dynamics to pinpoint the source of this severe problem, and our results indicate that such devices show great promise provided that dangling bond (DB) defects...

We report our results on the influence of the dipole moment of small molecules anchored to the surface of CdSe nanocrystals, over the interfacial charge recombination dynamics in CdSe/P3HT (P3HT : poly-3-hexylthiophene). The polarizability of the CdSe/P3HT interface is key to achieving efficient charge separation and slow back electron transfer, two of the most important processes to boost the ...

We introduce coplanar stripline circuits to resolve the ultrafast photocurrent dynamics of freely suspended carbon nanotubes (CNTs) in the time domain. By applying an on-chip pump-probe laser spectroscopy, we demonstrate that CNTs, contacted by metal electrodes, exhibit a picosecond photocurrent response. We find a combination of an optically induced ultrafast displacement current, transport of...

We observed that radio-frequency (rf) irradiation significantly enhances the c-axis resistance near and below the superconducting transition of the CuO2 layer in contact with a normal-metal electrode on the surface of Bi2Sr2CaCu2O8+x single crystals. We attribute the resistance anomaly to the rf-induced charge-imbalance nonequilibrium effect in the surface CuO2 layer. The relaxation of the char...

background: crimean-congo hemorrhagic fever virus (cchfv) belongs to genus nairovirus and family bunyaviridae. the main aim of this study was to investigate the extent of recombination in s-segment genome of cchfv in iran. methods: samples were isolated from iranian patients and those available in genbank, and analyzed by phyloge­netic and bootscan methods. results: through comparison of the ph...