A5021430922- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Photochemistry and Electron Transfer Studies
- Electrochemical Analysis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Catalysis and Oxidation Reactions
- Analytical Chemistry and Sensors
- Copper-based nanomaterials and applications
- Spectroscopy and Quantum Chemical Studies
- Gas Sensing Nanomaterials and Sensors
- Organic Light-Emitting Diodes Research
- Polyoxometalates: Synthesis and Applications
- Electrochemical sensors and biosensors
- Iron oxide chemistry and applications
- Organic Electronics and Photovoltaics
- Advancements in Battery Materials
- Solid-state spectroscopy and crystallography
- Surfactants and Colloidal Systems
- Molecular Junctions and Nanostructures
École Polytechnique Fédérale de Lausanne
2016-2025
Interface (United States)
2014-2025
Nankai University
2022-2025
Photonics (United States)
2015-2025
Interface (United Kingdom)
2025
Weatherford College
2023
Shanghai University
2023
South China Normal University
2023
The University of Tokyo
2022
Toin University of Yokohama
2022
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConversion of light to electricity by cis-X2bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium(II) charge-transfer sensitizers (X = Cl-, Br-, I-, CN-, and SCN-) on nanocrystalline titanium dioxide electrodesM. K. Nazeeruddin, A. Kay, I. Rodicio, R. Humphry-Baker, E. Mueller, P. Liska, N. Vlachopoulos, M. GraetzelCite this: J. Am. Chem. Soc. 1993, 115, 14, 6382–6390Publication Date (Print):July 1, 1993Publication History Published online1 May...
The hybrid organic–inorganic perovskite (CH3NH3)PbI3 may find application in next generation solid-state sensitised solar cells. Although this material and related perovskites were discovered many decades ago, questions remain concerning their diverse structural chemistry unusual properties. article presents a review of previous work provides detailed description the preparation, characterisation physical characteristics (CH3NH3)PbI3. phase changes exhibited by have been probed using...
Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far market requirements. Various technological approaches have been proposed to overcome instability problem, which, while delivering appreciable incremental improvements, still from a market-proof solution. Here we show one-year devices engineering an ultra-stable 2D/3D (HOOC(CH2)4NH3)2PbI4/CH3NH3PbI3 junction. The forms...
Lead free perovskite solar cells based on a CsSnI3 light absorber with spectral response from 950 nm is demonstrated. The high photocurrents noted in the system are consequence of SnF2 addition which reduces defect concentrations and hence background charge carrier density.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArtificial photosynthesis. 1. Photosensitization of titania solar cells with chlorophyll derivatives and related natural porphyrinsAndreas Kay Michael GraetzelCite this: J. Phys. Chem. 1993, 97, 23, 6272–6277Publication Date (Print):June 1, 1993Publication History Published online1 May 2002Published inissue 1 June 1993https://pubs.acs.org/doi/10.1021/j100125a029https://doi.org/10.1021/j100125a029research-articleACS PublicationsRequest reuse...
Abstract Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and simple processes required to produce them. However, frequent presence a pronounced hysteresis current voltage characteristic these devices arises concerns on intrinsic stability organo-metal halides, challenging reliability technology itself. Here, we show that n-doping mesoporous TiO 2 is accomplished by facile post treatment films lithium salts. We...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArtificial photosynthesis: water cleavage into hydrogen and oxygen by visible lightMichael GraetzelCite this: Acc. Chem. Res. 1981, 14, 12, 376–384Publication Date (Print):December 1, 1981Publication History Published online1 May 2002Published inissue 1 December 1981https://pubs.acs.org/doi/10.1021/ar00072a003https://doi.org/10.1021/ar00072a003research-articleACS PublicationsRequest reuse permissionsArticle Views5883Altmetric-Citations741LEARN...
Insights into the interplay of different recombination mechanisms and their origins (bulk, surface) are provided comparing fresh, light-soaked aged devices.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVectorial electron injection into transparent semiconductor membranes and electric field effects on the dynamics of light-induced charge separationBrian. O'Regan, Jacques. Moser, Marc. Anderson, Michael. GraetzelCite this: J. Phys. Chem. 1990, 94, 24, 8720–8726Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published inissue 1 November...
Abstract CH 3 NH PbX (MAPbX ) perovskites have attracted considerable attention as absorber materials for solar light harvesting, reaching to power conversion efficiencies above 20%. In spite of the rapid evolution efficiencies, understanding basic properties these semiconductors is still ongoing. One phenomenon with so far unclear origin so-called hysteresis in current–voltage characteristics cells. Here we investigate this a combined experimental and computational approach. Experimentally...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge carrier trapping and recombination dynamics in small semiconductor particlesGuido Rothenberger, Jacques Moser, Michael Graetzel, Nick Serpone, Devendra K. SharmaCite this: J. Am. Chem. Soc. 1985, 107, 26, 8054–8059Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.org/doi/10.1021/ja00312a043https://doi.org/10.1021/ja00312a043research-articleACS...
A ZnO compact layer formed by electrodeposition and nanorods grown chemical bath deposition (CBD) allow the processing of low-temperature, solution based flexible solid state perovskite CH3NH3PbI3 solar cells. Conversion efficiencies 8.90% were achieved on rigid substrates while ones yielded 2.62%.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVisible light induced water cleavage in colloidal solutions of chromium-doped titanium dioxide particlesEnrico Borgarello, John Kiwi, Michael Graetzel, Ezio Pelizzetti, and Mario ViscaCite this: J. Am. Chem. Soc. 1982, 104, 11, 2996–3002Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10.1021/ja00375a010https://doi.org/10.1021/ja00375a010research-articleACS...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVery efficient visible light energy harvesting and conversion by spectral sensitization of high surface area polycrystalline titanium dioxide filmsNick. Vlachopoulos, Paul. Liska, Jan. Augustynski, Michael. GraetzelCite this: J. Am. Chem. Soc. 1988, 110, 4, 1216–1220Publication Date (Print):February 17, 1988Publication History Published online1 May 2002Published inissue 17 February...
We report on the effect of nanoparticle morphology and interfacial modification performance hybrid polymer/zinc oxide photovoltaic devices. compare structures consisting poly-3-hexylthiophene (P3HT) polymer in contact with three different types ZnO layer: a flat backing layer alone; vertically aligned nanorods layer; nanoparticles layer. use scanning electron microscopy, steady state transient absorption spectroscopies, device measurements to study morphology, charge separation,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopy of conduction band electrons in transparent metal oxide semiconductor films: optical determination the flatband potential colloidal titanium dioxide filmsGuido Rothenberger, Donald Fitzmaurice, and Michael GraetzelCite this: J. Phys. Chem. 1992, 96, 14, 5983–5986Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface complexation of colloidal semiconductors strongly enhances interfacial electron-transfer ratesJacques Moser, Swarnalatha Punchihewa, Pierre P. Infelta, and Michael GraetzelCite this: Langmuir 1991, 7, 12, 3012–3018Publication Date (Print):December 1, 1991Publication History Published online1 May 2002Published inissue 1 December 1991https://pubs.acs.org/doi/10.1021/la00060a018https://doi.org/10.1021/la00060a018research-articleACS...
A new series of iridium(III) mixed ligand complexes TBA[Ir(ppy)2(CN)2] (1), TBA[Ir(ppy)2(NCS)2] (2), TBA[Ir(ppy)2(NCO)2] (3), and [Ir(ppy)2(acac)] (4) (ppy = 2-phenylpyridine; acac acetoylacetonate, TBA tetrabutylammonium cation) have been developed fully characterized by UV−vis, emission, IR, NMR, cyclic voltammetric studies. The lowest energy MLCT transitions are tuned from 463 to 494 nm tuning the HOMO levels. These show emission maxima in blue, green, yellow region visible spectrum...
Phase-pure TiO2(B) with microfibrous morphology was prepared via a newly developed method from amorphous TiO2. Cyclic voltammetry evidences that Li-insertion into is governed by pseudocapacitive faradaic process, whose rate not limited solid-state diffusion of Li+ in broad interval scan rates. This unusual behavior discussed terms the crystal structure host, having freely accessible parallel channels for Li+-transport perpendicular to (010) face. The characteristic electrochemistry allows...
The remarkably high open-circuit voltage of methylammonium lead iodide perovskite solar cells is investigated. Both the theoretical maximum and real are predicted from electroluminescence photovoltaic external quantum efficiency spectra. Radiative non-radiative recombination quantified, where a source found in mesoscopic structure, independent Al2O3 or TiO2 scaffold. Without hole-transport layer, strongly enhanced, which reduces voltage.