Dye-sensitized solar cells have been tested before, during, and after stress tests performed either under intense Xe-lamp illumination (equivalent to 1 sun up to 2.5 sun) or under thermal cycles between room T and 80 C. In-situ emission spectra and transient photovoltage decay curves have been taken to monitor the cell aging conditions. Incipient degradation phenomena in aged cells can be detec...

Metal-insulator-semiconductor (MIS) photoelectrodes offer a simple alternative to the traditional semiconductor-liquid junction and the conventional p-n junction electrode. Highly efficient MIS photoanodes require interfacial surface passivating oxides and high workfunction metals to produce a high photovoltage. Herein, we investigate and analyze the effect of interfacial oxides and metal workf...

In the present study, two new organic dyes based on indigo were prepared and used as sensitizers in dye-sensitized solar cells. To this end, indoxyl was utilized as the electron donor and cyanoacrylic acid as the electron acceptor anchoring groups. These dyes together with their corresponding intermediates were purified and characterized by FTIR, 1HNMR, 13CNMR, elemental analysis and UV-Visible...

<p>A study of the illumination wavelength effect on series and shunt resistances a serial vertical junction silicon solar cell in frequency modulation is done. From continuity equation minority carriers’ density, expressions photocurrent photovoltage, are determined. The curves I-V characteristic permit us to deduce resistances, which depend modulation. A few values short long wavelengths...

A three-dimensional approach to the effect of magnetic field incidence angle on electrical power and conversion efficiency is performed a front-illuminated polycrystalline silicon bifacial solar cell. solution continuity equation allowed us present equations photocurrent density, photovoltage electric power. The influence has been studied. curves versus dynamic junction velocity were used extra...

We investigate the optoelectronic properties of novel graphene/FeCl3-intercalated few-layer graphene (FeCl3-FLG, dubbed graphexeter) heterostructures using photovoltage spectroscopy. We observe a prominent photovoltage signal generated at the graphene/FeCl3-FLG and graphene/Au interfaces, whereas the photovoltage at the FeCl3-FLG/Au interface is negligible. The sign of the photovoltage changes ...

The migration of weakly and non-luminescent (dark) excitons remains an understudied subset of exciton dynamics in molecular thin films. Inaccessible via photoluminescence, these states are often probed using photocurrent methods that require efficient charge collection. Here we probe exciton harvesting in both luminescent and dark materials using a photovoltage-based technique. Transient photov...

Conductive atomic force microscopy ~C-AFM! and surface photovoltage ~SPV! microscopy were used to investigate local electronic structure in p-type GaN. C-AFM imaging revealed locally reduced forwardand reverse-bias conductivity near threading dislocations. In addition, regions near threading dislocations demonstrated significantly enhanced surface photovoltage response when compared to regions ...

Solar-assisted water splitting can potentially provide an efficient route for large-scale renewable energy conversion and storage. It is essential for such a system to provide a sufficiently high photocurrent and photovoltage to drive the water oxidation reaction. Here we demonstrate a photoanode that is capable of achieving a high photovoltage by engineering the interfacial energetics of metal...

Organic polar crystals from the donor-acceptor substituted 1,4-diphenybutadiene 1 can generate a short-circuit photocurrent and a photovoltage upon illumination with near UV light. The photocurrent and photovoltage are attributed to a bulk photovoltaic effect. The bulk photovoltaic effect has been known for inorganic polar crystals for decades and can now also be demonstrated for organic polar ...