Photoelectric performance of TiO2 nanotube array photoelectrodes sensitized with CdS0.54Se0.46 quantum dots
TL;DR: In this paper, the photoelectrochemical performance of CdSSe quantum dots tethered to a framework of vertically oriented titania (TiO2) nanotubes was studied.
About: This article is published in Applied Surface Science.The article was published on 2015-11-15 and is currently open access. It has received 30 citations till now. The article focuses on the topics: Quantum dot & Photocurrent.
Citations
More filters
TL;DR: In this paper, a review of the recent advances made through the semiconductor nanoparticles sensitization on well aligned, vertically oriented TiO 2 NTs for fabrication of high efficiency third generation solar cells architecture is presented.
Abstract: Titanium di-oxide (TiO 2 ) nanotubes (NTs) based solar cells are currently analyzed for the high efficiency solar cell devices due to its efficient electron transport. In this context, the present review deals about the recent advances made through the semiconductor nanoparticles sensitization on well aligned, vertically oriented TiO 2 NTs for fabrication of high efficiency third generation solar cells architecture. This review also deals with the efficient methods which are currently used to sensitize TiO 2 NTs by semiconductor nanoparticles. Special attention has been paid to the sensitization effect of cadmium chalcogenides based nanoparticles (CdS, CdSe, CdTe) on TiO 2 nanotubes in improving the efficiency of the solar cell. The expectations on TiO 2 NTs to face the 20 Terawatt (20 TW) challenge is examined.
38 citations
TL;DR: In this paper, a photoanodes with high surface area and one-dimensional transport properties combined with RGO/CdS as electron collectors and transporters were fabricated by two-step electrochemical anodic oxidation to form highly ordered TiO2 nanotube arrays (TNTs).
32 citations
TL;DR: In this article, a three-dimensional double layered rosette-rod TiO2 heterojunction with Bi2S3 using two-step hydrothermal method and solvothermal route was fabricated.
29 citations
TL;DR: In this article, a photoelectrocatalytic mechanism was proposed and discussed, and the physicochemical properties of the resulting photo-electrode were systematically studied by series of measurements.
26 citations
TL;DR: In this paper, self-aligned titania nanotube arrays (TNAs) were fabricated by electrochemical anodization at high voltage of 120 V in an electrolyte containing high F − concentration.
25 citations
References
More filters
Book•
01 Jan 1980
TL;DR: In this paper, the authors present a comprehensive overview of electrode processes and their application in the field of chemical simulation, including potential sweep and potential sweep methods, coupled homogeneous chemical reactions, double-layer structure and adsorption.
Abstract: Major Symbols. Standard Abbreviations. Introduction and Overview of Electrode Processes. Potentials and Thermodynamics of Cells. Kinetics of Electrode Reactions. Mass Transfer by Migration and Diffusion. Basic Potential Step Methods. Potential Sweep Methods. Polarography and Pulse Voltammetry. Controlled--Current Techniques. Method Involving Forced Convention--Hydrodynamic Methods. Techniques Based on Concepts of Impedance. Bulk Electrolysis Methods. Electrode Reactions with Coupled Homogeneous Chemical Reactions. Double--Layer Structure and Adsorption. Electroactive Layers and Modified Electrodes. Electrochemical Instrumentation. Scanning Probe Techniques. Spectroelectrochemistry and Other Coupled Characterization Methods. Photoelectrochemistry and Electrogenerated Chemiluminescence. Appendix A: Mathematical Methods. Appendix B: Digital Simulations of Electrochemical Problems. Appendix C: Reference Tables. Index.
20,533 citations
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
Abstract: In order to find an upper theoretical limit for the efficiency of p‐n junction solar energy converters, a limiting efficiency, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of hole‐electron pairs is radiative as required by the principle of detailed balance. The efficiency is also calculated for the case in which radiative recombination is only a fixed fraction fc of the total recombination, the rest being nonradiative. Efficiencies at the matched loads have been calculated with band gap and fc as parameters, the sun and cell being assumed to be blackbodies with temperatures of 6000°K and 300°K, respectively. The maximum efficiency is found to be 30% for an energy gap of 1.1 ev and fc = 1. Actual junctions do not obey the predicted current‐voltage relationship, and reasons for the difference and its relevance to efficiency are discussed.
11,071 citations
TL;DR: In this paper, the present status and new opportunities for research in this area of materials physical chemistry are reviewed, as well as a review of the present state and opportunities in this field.
Abstract: Semiconductor nanocrystals exhibit a wide range of size-dependent properties. Variations in fundamental characteristics ranging from phase transitions to electrical conductivity can be induced by controlling the size of the crystals. The present status and new opportunities for research in this area of materials physical chemistry are reviewed.
3,493 citations
2,822 citations
TL;DR: EDS results confirmed a systematic increase of Eu content in the as-prepared samples with the increase of nominal europiumcontent in the reaction solution, and crystallinity and crystallite size of the titania particles decreased gradually.
Abstract: Uniform, spherical-shaped TiO2:Eu nanoparticles with different doping concentrations have been synthesized through controlled hydrolysis of titanium tetrabutoxide under appropriate pH and temperature in the presence of EuCl3·6H2O. Through air annealing at 500°C for 2 h, the amorphous, as-grown nanoparticles could be converted to a pure anatase phase. The morphology, structural, and optical properties of the annealed nanostructures were studied using X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy [EDS], and UV-Visible diffuse reflectance spectroscopy techniques. Optoelectronic behaviors of the nanostructures were studied using micro-Raman and photoluminescence [PL] spectroscopies at room temperature. EDS results confirmed a systematic increase of Eu content in the as-prepared samples with the increase of nominal europium content in the reaction solution. With the increasing dopant concentration, crystallinity and crystallite size of the titania particles decreased gradually. Incorporation of europium in the titania particles induced a structural deformation and a blueshift of their absorption edge. While the room-temperature PL emission of the as-grown samples is dominated by the 5D0 - 7Fj transition of Eu+3 ions, the emission intensity reduced drastically after thermal annealing due to outwards segregation of dopant ions.
2,378 citations