This study investigates the extent to which the TiO2/graphene/TiO2 sandwich structure improves the performance of dye-sensitized solar cells (DSSCs) over that of DSSCs with the traditional structure. Studies have demonstrated that the TiO2/graphene/TiO2 sandwich structure effectively enhances the open circuit voltage (V oc), short-circuit current density (J sc), and photoelectrical conversion e...

The objective of this research project is to determine the key operational characteristics for realizing efficient, low-cost, stable solar cells based on dyesensitized mesoporous nanostructured films (in collaboration with DOE’s Office of Science Program). Toward this end, we have investigated the structure and the dynamics of electron transport and recombination in dye-sensitized solar cells (...

ZnO photoanodes for dye sensitized solar cell were sythesized by using sol-gel spin coating method. XRD pattern confirmed that ZnO film was crystalline in nature and crystallite size calculated was 45.8 nm. The grain size measured form SEM image of ZnO film was 66.6 nm. Transmission of thin film was observed 75-92% in wavelength range from 400-800nm. The photon to electron conversion effiecienc...

Abstract This work presents betanin dye-loaded TiO 2 -ZnO thin film solar cells for energy harvesting. The nanocomposite was prepared by the one-step microwave-assisted technique. Structural studies exhibit mixed phases of rutile and wurtzite structure ZnO respectively. morphological investigations deposited showed interconnected many-fold nanoflakes morphology. EDS confirms formation stoichiom...

We use free-standing TiO2 nanotube membranes that are transferred onto FTO slides in front-side illuminated dye-sensitized solar cells (DSSCs). We investigate the key parameters for solar cell arrangement of self-ordered anodic TiO2 nanotube layers on the FTO substrate, namely the influence of the annealing procedure on the DSSC light conversion efficiency. The results show that using an optima...

ZnO is an alternative to TiO2-based dye-sensitized solar cells (DSSCs). Adsorption of cis-rutheniumbis[2,20-bipyridine]-bis[4-thiopyridine] onto ZnO nanorods has been studied using X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS). XPS indicates chemisorption with a surface density of ca. 1 10 molecules/cm, confirming the possibility of using thiol-terminated dyes for ZnO-based D...

The immobilization of titanium dioxide is necessary for several energy and environmental applications such as dye-sensitized solar cells (DSSCs). A two-step fabrication route has been developed in this work including a near room temperature hydrolysis reaction to produce immobilized (NH4)2TiOF4 arrays, followed by successive topotactic transformations immobilised TiO2 mesocrystals (imcTiO2). Hi...

Dye-sensitized solar cells (DSSCs) have been developed as a promising photovoltaic cell type in recent decades because of their low cost, environmental friendliness, ease fabrication, and suitability for wide range indoor outdoor applications, especially under diverse shaded low-light condition. They are typically composed three main components: transparent conducting oxide (TCO) substrate-base...

Y1.86Eu0.14WO6 phosphors were prepared using a solid-state reaction method. Their optical properties were analysed, and they was mixed with TiO2, sintered, and used as a photoelectrode (PE) in dye-sensitized solar cells (DSSCs). The as-prepared photoelectrode was characterized by photoluminescence spectroscopy, diffuse reflectance, electrochemical impedance spectroscopy (EIS) and X-ray diffract...

High extinction coefficients and easily tunable spectral properties of π conjugated donor-acceptor dyes are of superior advantage for the design of new metalfree organic sensitizers for applications in dye-sensitized solar cells. Ultrafast transient absorption spectroscopy on the femtosecond and nanosecond time scales provided deep insights into the dependence of charge carrier dynamics in full...