Laser induced photocurrent and photovoltage transient measurements of dye-sensitized solar cells based on TiO2 nanosheets and TiO2 nanoparticles
Aldwayyan, Hamid M. Ghaithan;Saif M.H. Qaid;Mahmoud Hezam;, Joselito P. Labis;Mohammad Alduraibi;, Idriss M. Bedja and Abdullah S. . 2016
Dye-sensitized solar cells (DSSCs) based on TiO2 nanoparticles and TiO2 nanosheets with exposed {001} facets are investigated using laser-induced photovoltage and photocurrent transient decay (LIPVCD) measurements. We adopted a simplified version of LIPVCD technique, in which a single illumination light source and a laboratory oscilloscope could be conveniently used for the measurements. Although the {001} surface of TiO2 nanosheets allowed a noticeably slower recombination with the electrolyte, this was counterpoised by a slower electron transport probably due to its planar morphology, resulting in a shorter diffusion length in TiO2 nanosheets. The nanosheet morphology also resulted in less surface area and therefore reduced short circuit current density in the fabricated devices. Our work highlights the fact that the morphological parameters of TiO2 nanosheets finally resulting after electrode film deposition is of no less importance than the reported efficient dye adsorption and slow electron recombination at the surface of individual nanosheets.
In this study, we investigated the optoelectronic properties of cubic (Pm3m) and orthorhombic (Pnma) CsPbX3 (X = I, Br, and Cl). We utilized the full potential linear augmented plane wave method,…
The goal of this research is to see how excitation wavelength affects steady-state photoluminescence (PL), time-resolved photoluminescence (TRPL), and amplified spontaneous emission (ASE) in…
A solid redox mediator (solid electrolyte) with an electrical conductivity (σ25°C) greater than 10−4 S cm−1 is an essential requirement for a dye-sensitized solar cell in the harsh weather of Gulf…