tellurium (te) nanostructures have been successfully synthesized via a simple hydrothermal methodfrom the reaction of a tecl4 aqueous solution with thioglycolic acid (tga) as a reductant. tga can be easily oxidized to the corresponding disulfide [sch2co2h]2, which in turn can reduce tecl4 to te. the obtained te was characterized by xrd, sem, eds, and drs. the effect of reducing agent on morphol...

The use of self-assembled monolayers (SAMs) to improve and tailor the photovoltaic performance of plasmonic hot-electron Schottky solar cells is presented. SAMs allow the simultaneous control of open-circuit voltage, hot-electron injection and short-circuit current. To that end, a plurality of molecule structural parameters can be adjusted: SAM molecule's length can be adjusted to control plasm...

A crucial issue facing polymer-based solar cells is how to manage the energetics of the polymer/fullerene blends to maximize short-circuit current density and open-circuit voltage at the same time and thus the power conversion efficiency. Here we demonstrate that the use of a naphthobisoxadiazole-based polymer with a narrow bandgap of 1.52 eV leads to high open-circuit voltages of approximately...

The interface of planar TiO(2)/polymer photovoltaic cells was modified with two carboxylated polythiophenes having different densities of carboxylic acid groups. Both of the interface modifiers increase the photocurrent of the cells but lower the open-circuit voltage. The work function of the TiO(2), measured using a Kelvin probe, increases with increasing density of carboxylic acid groups due ...

Delta doping with deep-level centers results in a marked decrease of open-circuit voltage and fill factor of photodiodes and solar cells when the doped layer is located near the crossover of electron and hole densities. The omission of recombination centers in a thin layer (inverse delta doping) at this position consequently causes an increase of the open-circuit voltage. The difficulty of impr...

The conversion efficiency of ultra-thin solar cells based on layered materials has been limited by their open-circuit voltage, which is typically pinned to a value under 0.6 V. Here we report an voltage 1.02 V in 120 nm-thick vertically stacked homojunction fabricated with substitutionally doped MoS2. This high consistent the band alignment MoS2 homojunction, more favourable than widely-used TM...