Juan Bisquert

TL;DR: In this paper, first-principles computational analyses were carried out on the tetragonal MAPbI3 (MA = methylammonium) perovskite and on its interface with TiO2, and it was shown that negatively charged defects, close to the electron transport layer (TiO2 in our case) modify the perovsite electronic state landscape, hampering charge extraction at selective contacts, thus contributing to the observed solar cell hysteresis.

TL;DR: In this paper, the small signal ac impedance of electron diffusion and recombination in a spatially restricted situation with application in systems such as porous TiO2 nanostructured photoelectrodes and intrinsically conducting polymers is analyzed.

TL;DR: A new powerful tool to study the electron lifetime in dye solar cells as a function of the photovoltage (Voc) ; the open-circuit voltage-decay (OCVD) technique is developed and has certain advantages over frequenIn summary, the temperature effect on the arrangement of stilbenoid dendrimers on HOPG is presented in this work.

TL;DR: In this paper, the main features of the characteristic impedance spectra of dye-sensitized solar cells are described in a wide range of potential conditions: from open to short circuit.

TL;DR: Impedance spectroscopy was applied to investigate the characteristics of dye-sensitized nanostructured TiO2 solar cells with high efficiencies of light to electricity conversion of 11.1% and 10.2%, allowing a separate analysis of the contribution of different resistive processes to the overall conversion efficiency.