Etienne Baranoff

University of Birmingham

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Mohammad Khaja Nazeeruddin

École Polytechnique Fédérale de Lausanne

Michaël Grätzel

École Polytechnique Fédérale de Lausanne

Henk J. Bolink

Universitat de València

Rosario Scopelliti

École Polytechnique Fédérale de Lausanne

Enrique Ortı́

Parc Científic de la Universitat de València

Ivano Tavernelli

IBM Research - Zurich

Basile F. E. Curchod

University of Bristol

R. Scopelliti

École Polytechnique Fédérale de Lausanne

Florian Kessler

GZO Spital Wetzikon

Louise Male

University of Birmingham

Cooperative Institutions

École Polytechnique Fédérale de Lausanne

Centre National de la Recherche Scientifique

Universitat de València

Parc Científic de la Universitat de València

Institut de Chimie

Charles Humbert 8

Chinese Academy of Sciences

University of Basel

Xiangtan University

Changzhou University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Enhanced light harvesting in mesoporous TiO2/P3HT hybrid solar cells using a porphyrin dye

Chemical Communications (2011)

Soo‐Jin Moon Etienne Baranoff Shaik M. Zakeeruddin Chen‐Yu Yeh Eric Wei‐Guang Diau

We report panchromatic light harvesting in hybrid TiO(2)/P3HT photovoltaic devices using a porphyrin dye that complements the light absorption of P3HT. The high short circuit photocurrent (12.1 mA cm(-2)) obtained is found to be due, in part, to Förster resonance energy transfer from the P3HT to the dye.

Photocurrent

Panchromatic film

10.1039/c1cc12251g

Cite

Citations (64)

Tris(2-(1H-pyrazol-1-yl)pyridine)cobalt(III) as p-Type Dopant for Organic Semiconductors and Its Application in Highly Efficient Solid-State Dye-Sensitized Solar Cells

Journal of the American Chemical Society (2011)

Julian Burschka Amalie Dualeh Florian Kessler Etienne Baranoff Ngoc‐Lê Cevey‐Ha

Chemical doping is an important strategy to alter the charge-transport properties of both molecular and polymeric organic semiconductors that find widespread application in organic electronic devices. We report on the use of a new class of Co(III) complexes as p-type dopants for triarylamine-based hole conductors such as spiro-MeOTAD and their application in solid-state dye-sensitized solar cells (ssDSCs). We show that the proposed compounds fulfill the requirements for this application and that the discussed strategy is promising for tuning the conductivity of spiro-MeOTAD in ssDSCs, without having to rely on the commonly employed photo-doping. By using a recently developed high molar extinction coefficient organic D-π-A sensitizer and p-doped spiro-MeOTAD as hole conductor, we achieved a record power conversion efficiency of 7.2%, measured under standard solar conditions (AM1.5G, 100 mW cm(-2)). We expect these promising new dopants to find widespread applications in organic electronics in general and photovoltaics in particular.

10.1021/ja207367t

Cite

Citations (733)

A novel donor moiety 9,9,9′9′-tetramethyl-9,9′10,10′-tetrahydro-2,10′-biacridine via one-pot C–H arylation for TADF emitters and their application in highly efficient solution-processable OLEDs

Journal of Materials Chemistry C (2020)

Yuchao Liu Zheng Yin Xiangbing Wang Etienne Baranoff Di Zhou

A novel donor fragment of BDMAc is synthesized via C–H arylation by the one-pot method, and three BDMAc-based TADF molecules with high efficiency are obtained. Solution processable OLEDs based on these TADF molecules exhibit a high EQE of ∼23%.

Moiety

10.1039/d0tc01612h

Cite

Citations (19)

CCDC 1552535: Experimental Crystal Structure Determination

The Cambridge Structural Database (2017)

Thomas W. Rees Jinfeng Liao Alessandro Sinopoli Louise Male Giuseppe Calogero

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc1p3js3

Cite

Citations (0)

CCDC 1552534: Experimental Crystal Structure Determination

The Cambridge Structural Database (2017)

Thomas W. Rees Jinfeng Liao Alessandro Sinopoli Louise Male Giuseppe Calogero

10.5517/ccdc.csd.cc1p3jr2

Cite

Citations (0)

CCDC 964311: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

Julien Frey Basile F. E. Curchod Rosario Scopelliti Ivano Tavernelli Ursula Röthlisberger

Crystal (programming language)

10.5517/cc11cftn

Cite

Citations (0)

CCDC 964310: Experimental Crystal Structure Determination

The Cambridge Structural Database (2013)

Julien Frey Basile F. E. Curchod Rosario Scopelliti Ivano Tavernelli Ursula Röthlisberger

Crystal (programming language)

10.5517/cc11cfsm

Cite

Citations (0)

Macrocycle-Based Liquid Crystals: A Study of Topological Effects on Mesomorphism

Molecular Crystals and Liquid Crystals (2009)

Etienne Baranoff Julie Voignier Takuma Yasuda Valérie Heitz J.‐P. Sauvage

A liquid-crystalline molecule based on a macrocycle and a forklike mesogen forms smectic A phases over a wide temperature range. This thermal behavior of the macrocycle-based compound has been compared with that of the corresponding catenane molecule.

Mesogen

Catenane

10.1080/15421400903065606

Cite

Citations (11)

A Triphenylamine/Bis(terpyridine)Ir^III Dyad for the Assembly of Charge‐Separation Constructs with Improved Performances

European Journal of Inorganic Chemistry (2007)

Lucia Flamigni Barbara Ventura Etienne Baranoff Jean‐Paul Collin Jean‐Pierre Sauvage

Abstract A new dyad DII‐Ir consisting of a triphenylamine donor and a bis(terpyridine)Ir III acceptor separated by a bridge composed of two benzamide groups has been synthesized. The electrochemical and photophysical properties of the dyad have been compared to those of a corresponding dyad D‐Ir characterized by a bridge connecting the donor and the acceptor consisting of a single benzamide unit. We show that, whereas the charge‐separation steps are still very efficient in the long dyad (≥99 %), charge recombination is slowed by a factor of three with respect to the short dyad. This encourages the use of this dyad in the assembly of a more elaborate array DII‐Ir‐A, expected to overcome the disappointingly low charge‐separation yield of a previously studied D‐Ir‐A short triad. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

Triphenylamine

Dyad

Terpyridine

Benzamide

Acceptor

Triad (sociology)

10.1002/ejic.200700669

Cite

Citations (13)

Structure–property relationships based on Hammett constants in cyclometalated iridium(iii) complexes: their application to the design of a fluorine-free FIrPic-like emitter

Dalton Transactions (2013)

Julien Frey Basile F. E. Curchod Rosario Scopelliti Ivano Tavernelli Ursula Röthlisberger

While phosphorescent cyclometalated iridium(iii) complexes have been widely studied, only correlations between oxidation potential EOX and Hammett constant σ, and between the redox gap (ΔEREDOX = EOX-ERED) and emission or absorption wavelength (λabs, λem) have been reported. We present now a quantitative model based on Hammett parameters that rationalizes the effect of the substituents on the properties of cyclometalated iridium(iii) complexes. This simple model allows predicting the apparent redox potentials as well as the electrochemical gap of homoleptic complexes based on phenylpyridine ligands with good accuracy. In particular, the model accounts for the unequal effect of the substituents on both the HOMO and the LUMO energy levels. Consequently, the model is used to anticipate the emission maxima of the corresponding complexes with improved reliability. We demonstrate in a series of phenylpyridine emitters that electron-donating groups can effectively replace electron-withdrawing substituents on the orthometallated phenyl to induce a blue shift of the emission. This result is in contrast with the common approach that uses fluorine to blue shift the emission maximum. Finally, as a proof of concept, we used electron-donating substituents to design a new fluorine-free complex, referred to as EB343, matching the various properties, namely oxidation and reduction potentials, electrochemical gap and emission profile, of the standard sky-blue emitter FIrPic.

Homoleptic

Fluorine

HOMO/LUMO

10.1039/c3dt52739e

Cite

Citations (98)