Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TLDR
In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.Abstract:
THE large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods1. Here we describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-µm-thick, optically transparent film of titanium dioxide particles a few nanometres in size, coated with a monolayer of a charge-transfer dye to sensitize the film for light harvesting. Because of the high surface area of the semiconductor film and the ideal spectral characteristics of the dye, the device harvests a high proportion of the incident solar energy flux (46%) and shows exceptionally high efficiencies for the conversion of incident photons to electrical current (more than 80%). The overall light-to-electric energy conversion yield is 7.1-7.9% in simulated solar light and 12% in diffuse daylight. The large current densities (greater than 12 mA cm-2) and exceptional stability (sustaining at least five million turnovers without decomposition), as well as the low cost, make practical applications feasible.read more
Citations
More filters
Journal ArticleDOI
Photoredox functionalization of C–H bonds adjacent to a nitrogen atom
Lei Shi,Wujiong Xia +1 more
TL;DR: This tutorial review aims to give a brief overview of the functionalization of C-H bonds and the visible light photoredox catalysis and state the main results obtained in the reactions.
Journal ArticleDOI
Flexible Electronics: The Next Ubiquitous Platform
Arokia Nathan,Arman Ahnood,Matthew T. Cole,Sungsik Lee,Yuji Suzuki,Pritesh Hiralal,Francesco Bonaccorso,Tawfique Hasan,Luis Garcia-Gancedo,A. Dyadyusha,Samiul Haque,Piers Andrew,Stephan Hofmann,James Moultrie,Daping Chu,Andrew J. Flewitt,Andrea C. Ferrari,Michael Kelly,John Robertson,Gehan A. J. Amaratunga,William I. Milne +20 more
TL;DR: The current status of flexible electronics is reviewed and the future promise of these pervading technologies in healthcare, environmental monitoring, displays and human-machine interactivity, energy conversion, management and storage, and communication and wireless networks is predicted.
Journal ArticleDOI
Correlation between Photovoltaic Performance and Impedance Spectroscopy of Dye-Sensitized Solar Cells Based on Ionic Liquids
Francisco Fabregat-Santiago,Juan Bisquert,Emilio Palomares,Luis Otero,Dai-Bin Kuang,Shaik M. Zakeeruddin,Michael Grätzel +6 more
TL;DR: In this paper, the characteristics of dye-sensitized solar cells using an ionic liquid as the electrolyte and compare them with the response of a solvent-containing electrolyte cell were analyzed.
Journal ArticleDOI
Titanium dioxide crystals with tailored facets
Gang Liu,Hua Gui Yang,Hua Gui Yang,Jian Pan,Jian Pan,Yongqiang Yang,Yongqiang Yang,Gao Qing Max Lu,Hui-Ming Cheng,Hui-Ming Cheng +9 more
TL;DR: Titanium dioxide (TiO2) has been the most intensively investigated binary transition metal oxide in the past four decades and the annual number of papers published on TiO2 has seen a continuous increase, particularly since the beginning of this century.
Journal ArticleDOI
Optimizing Dyes for Dye-Sensitized Solar Cells
TL;DR: Dye design is discussed in the context of novel alternatives to the standard liquid electrolyte in DSSCs which promises cheap, efficient, and robust photovoltaic systems.
References
More filters
Journal ArticleDOI
Electrochemical Photolysis of Water at a Semiconductor Electrode
Akira Fujishima,Kenichi Honda +1 more
TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
Journal ArticleDOI
Ru(II) polypyridine complexes: photophysics, photochemistry, eletrochemistry, and chemiluminescence
Alberto Juris,Vincenzo Balzani,F. Barigelletti,Sebastiano Campagna,Peter Belser,A. Von Zelewsky +5 more
Journal ArticleDOI
Vectorial electron injection into transparent semiconductor membranes and electric field effects on the dynamics of light-induced charge separation
TL;DR: In this article, the dynamics of charge recombination following electron injection from the excited state of RuL{sub 3} into the conduction band of the semiconductor were examined under potentiostatic control of the electric field within the space charge layer of the membrane.
Journal ArticleDOI
The impact of semiconductors on the concepts of electrochemistry
TL;DR: In this article, it was realized that semiconductor electrodes behave differently in many respects and offer new insights into the role played by the electronic properties of a solid in its electrochemical reactivity.
Journal ArticleDOI
Electrochemistry and photochemistry of MoS2 layer crystals. I
H. Tributsch,J.C. Bennett +1 more
TL;DR: In this article, the chemical and photochemical behavior of MoS 2 -van der Waals surfaces in contact with an aqueous electrolyte has been investigated by means of electrochemical techniques.