Enhanced photovoltaic characterization and charge transport of TIO2 nanoparticles/nanotubes composite photoanode based on indigo carmine dye-sensitized solar cells

摘要: Dye-sensitized solar cells (DSSCs) have established themselves as an alternative to conventional owing their remarkably high power conversion efficiency, longtime stability and low-cost production. DSSCs composed of a dyed oxide semiconductor photoanode, redox electrolyte counter electrode. In these devices, efficiency is achieved by ultra-fast injection electron from photo excited dye into the conduction band metal followed subsequent regeneration holes transportation The energy DSSC be dependent on morphology structure adsorbed photoanode. Worldwide considerable efforts been invested in control photoanode film, synthesis stable optical sensitizers improved ionic conductivity electrolytes. present investigation, new composite nano structured photoanodes were prepared using TiO2 tubes (TNTs) with particles (TNPs). TNPs synthesized sol–gel method TNTs through alkali hydrothermal transformation. Working five pastes concentrations 0, 10, 50, 90, 100 % TNPs. fabricated Indigo carmine sensitizer PMII (1-propyl-3-methylimmidazolium iodide) liquid electrolyte. electrode was Copper sulfide. characterized X-ray diffraction microscopes (TEM SEM). photocurrent measured simulator (100 mW/cm2). TNTs/TNPs could significantly improve dye-sensitized its synergic effects, i.e. effective adsorption mainly originated nanoparticles rapid transport one-dimensional nanotubes. results investigation suggested that based 10 % showed better photovoltaic performance than cell made pure nanoparticles. highest energy-conversion 2.80 % (10 %)/TNPs which 68 % higher film far larger formed bare (94 %). charge recombination behaviors investigated electrochemical impedance spectra film-based possessed lowest transfer resistances longest lifetime. Hence, it concluded facilitate enhancing efficiencies DSSCs.