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Mathieu Urien

Bio: Mathieu Urien is an academic researcher from University of Bordeaux. The author has contributed to research in topics: Atom-transfer radical-polymerization & OLED. The author has an hindex of 5, co-authored 5 publications receiving 417 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the effect of solvent on the electrical properties of films containing pure poly(3-hexyl)thiophene (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) was discussed.

161 citations

Journal ArticleDOI
TL;DR: In this article, ω-ethynyl-P3HT and α,ω-pentynyl P3HT were synthesized by a modified Grignard metathesis polymerization using alkynyl Grignards derivatives.
Abstract: π-Conjugated block copolymers have been prepared from terminal azide functionalized polystyrenes (PS) and alkyne functionalized poly(3-hexylthiophene)s (P3HT) via a copper(I) catalyzed Huisgen [3 + 2] dipolar cycloaddition reaction. The functionalized α-azido-PS homopolymer was prepared by atom transfer radical polymerization from a specifically designed initiator bearing the azide function, whereas ω-ethynyl-P3HT and α,ω-pentynyl-P3HT were synthesized by a modified Grignard metathesis polymerization using alkynyl Grignard derivatives. The electronic environment of the alkynyl end groups was shown to be decisive in determining triazole ring formation.

134 citations

Journal ArticleDOI
TL;DR: In this paper, the presence of impurities in the different fractions of P3HT is shown to affect not only the characteristics of the OFETs but also the photovoltaic performances.

69 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the relationship between the regioregularity of poly(3-hexylthiophene) (P3HT) and the composition of P3HT/PCBM blends and the performances of photovoltaic devices.
Abstract: BACKGROUND: The highest efficiencies of bulk-heterojunction solar cells from poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) reported so far are close to 6%. Phenomena occurring during the photovoltaic process, such as the creation, diffusion and separation of excitons, as well as charge carrier transport, are governed by the active layer morphology. The latter phenomenon, which depends on the self-organization of P3HT, can be influenced by its degree of regioregularity. The aim of this work is to clarify the relationship between the regioregularity of P3HT, the composition of P3HT/PCBM blends and the performances of photovoltaic devices. RESULTS: Two types of P3HTs with different degrees of regioregularity have been synthesized and used as active layers with PCBM in photovoltaic cells. The higher performances in photovoltaic devices are obtained for high-regioregular P3HT and can be explained considering the self-organizing properties of high-regioregular P3HT, leading to higher sunlight absorption and higher hole mobilities. In addition, this report demonstrates the importance of the ratio of P3HT versus PCBM in correlation with the regioregularity of P3HT on the optical properties, charge transport and characteristics of photovoltaic cells. CONCLUSION: We have investigated the dependence of the photovoltaic properties of P3HT/PCBM blend-based photovoltaic devices on the degree of regioregularity of P3HT. We find that the best performance is exhibited by devices based on highly regioregular P3HT. Also, the best performances are not obtained for the same P3HT:PCBM weight ratios for high-regioregular P3HT (1:0.8) and low-regioregular P3HT (1:3). Copyright © 2007 Society of Chemical Industry

57 citations

Journal ArticleDOI
TL;DR: In this paper, 3,4-ethylenedioxythiophene (EDOT) and dihexylfluorene (DFL) were designed to achieve high luminance values of approximately 1000 Cd/m2 at low applied voltage.

15 citations


Cited by
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Journal ArticleDOI
TL;DR: This Research News article is focused on a survey of the tremendous literature published between 2002 and 2010 that exhibits solar cells based on blends of P3HT and PCBM.
Abstract: In the field of polymer-based photovoltaic cells, poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C61 (PCBM) are, to date, the most-studied active materials around the world for the bulk-heterojunction structure. Various power-conversion efficiencies are reported up to approximately 5%. This Research News article is focused on a survey of the tremendous literature published between 2002 and 2010 that exhibits solar cells based on blends of P3HT and PCBM.

1,193 citations

Journal ArticleDOI
TL;DR: This critical review highlights the application of click chemistry, in particular the Cu(I)-catalyzed azide-alkyne cycloaddition, to the synthesis of a wide variety of new materials with possible uses as drug delivery agents, tissue engineering scaffolds, and dispersible nanomaterials.
Abstract: Click chemistry constitutes a class of reactions broadly characterized by efficiency, selectivity, and tolerance to a variety of solvents and functional groups. By far the most widely utilized of these efficient transformation reactions is the CuI-catalyzed azide–alkyne cycloaddition. This reaction has been creatively employed to facilitate the preparation of complex macromolecules, such as multiblock copolymers, shell or core cross-linked micelles, and dendrimers. This critical review highlights the application of click chemistry, in particular the CuI-catalyzed azide-alkyne cycloaddition, to the synthesis of a wide variety of new materials with possible uses as drug delivery agents, tissue engineering scaffolds, and dispersible nanomaterials (83 references).

707 citations

Journal ArticleDOI
TL;DR: In this review, the key points for development of high mobility OFETs are highlighted from aspects of molecular engineering, process engineering and interface engineering, and the importance of other factors, such as impurities and testing conditions is also addressed.
Abstract: Remarkable progress has been made in developing high performance organic field-effect transistors (OFETs) and the mobility of OFETs has been approaching the values of polycrystalline silicon, meeting the requirements of various electronic applications from electronic papers to integrated circuits. In this review, the key points for development of high mobility OFETs are highlighted from aspects of molecular engineering, process engineering and interface engineering. The importance of other factors, such as impurities and testing conditions is also addressed. Finally, the current challenges in this field for practical applications of OFETs are further discussed.

677 citations

Journal ArticleDOI
TL;DR: This work demonstrates hybrid solar cells based on the mixed perovskite CH3 NH3 PbI2 Cl in a thin film sandwich structure, with unprecedented reproducibility and generating efficiencies up to 10.8%.
Abstract: Organometal halide perovskites have tremendous potential as light absorbers for photovoltaic applications. In this work we demonstrate hybrid solar cells based on the mixed perovskite CH3 NH3 PbI2 Cl in a thin film sandwich structure, with unprecedented reproducibility and generating efficiencies up to 10.8%. The successfulness of our approach is corroborated by the experimental electronic structure determination of this perovskite.

632 citations

Journal ArticleDOI
TL;DR: Heterojunctions in Solar Cells: Lessons Learned from the Benchmark Poly(3-hexylthiophene):[6,6]-Phenyl‐C61-butyric Acid Methyl Ester System Minh Trung Dang.
Abstract: Heterojunctions in Solar Cells. Lessons Learned from the Benchmark Poly(3-hexylthiophene):[6,6]-Phenyl‐C61-butyric Acid Methyl Ester System Minh Trung Dang,† Lionel Hirsch,‡ Guillaume Wantz,‡ and James D. Wuest*,† †Deṕartement de Chimie, Universite ́ de Montreál, Pavillon J.-Armand Bombardier, 2900 boulevard Édouard-Montpetit, Montreál, Queb́ec H3T 1J4, Canada ‡Laboratoire de l'Inteǵration du Mateŕiau au System̀e, Universite ́ de Bordeaux, UMR CNRS 5218, École Nationale Supeŕieure de Chimie, Biologie et Physique, 16 Avenue Pey Berland, 33607 Pessac Cedex, France

564 citations