T. Heiser

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

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P. Lévêque

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

106

Nicolas Leclerc

Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé

Sadiara Fall

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

Georges Hadziioannou

Laboratoire de Chimie des Polymères Organiques

R. Bechara

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

Olzhas A. Ibraikulov

Université de Strasbourg

Laure Biniek

Institut Charles Sadron

Cyril Brochon

Laboratoire de Chimie des Polymères Organiques

Stéphane Méry

Centre National de la Recherche Scientifique

Benoı̂t Heinrich

Institut de Physique et Chimie des Matériaux de Strasbourg

Cooperative Institutions

Centre National de la Recherche Scientifique

178

Université de Strasbourg

108

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie

Institut de Physique et Chimie des Matériaux de Strasbourg

Institut de Chimie

Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé

Institut d'Électronique et des Systèmes

Canadian Nautical Research Society

University of Southampton

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

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Tuning the molecular structure of low band-gap donor-acceptor copolymers for an optimized photovoltaic performance

HAL (Le Centre pour la Communication Scientifique Directe) (2012)

Nicolas Leclerc Laure Biniek Sadiara Fall C. Chochos P. Lévêque

Acceptor

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Conjugated copolymers bearing 2,7-dithienylphenanthrene-9,10-dialkoxy units: highly soluble and stable deep-blue emissive materials

New Journal of Chemistry (2020)

Noorullah Baig Suchetha Shetty Sadiara Fall Saleh Mohammed Al‐Mousawi T. Heiser

Excellent yields, high stability and solubility. M_w = 36.5–152.0 kDa and Đ = 2.5–3.0. Deep-blue emission with quantum yields up to 17%.

Quantum yield

10.1039/d0nj01712d

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Citations (2)

Impact of the arrangement of functional moieties within small molecular systems for solution processable bulk heterojunction solar cells

New Journal of Chemistry (2013)

Pierre-Olivier Schwartz Elena Zaborova R. Bechara P. Lévêque T. Heiser

A series of molecules based on thienofluorene derivatives as electron donating (D) and benzothiadiazole as electron accepting (A) moieties have been assembled into DAD and ADA architectures in order to investigate the influence of the way of assembling the D and A units along the conjugated backbone, on the photovoltaic performances of bulk heterojunction solar cells. It was found that the major difference in going from ADA to DAD architecture is the change in molecular organization (nematic to crystalline), which increases the charge transport mobility and probably also affects the structural organization in blends with PCBM that ultimately leads to higher photovoltaic performances.

10.1039/c3nj00218g

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Citations (8)

Fullerene-grafted block copolymers used as compatibilizer in P3HT/PCBM bulk heterojunctions: morphology and photovoltaic performances

The European Physical Journal Applied Physics (2011)

V. Gernigon P. Lévêque Cyril Brochon Jean‐Nicolas Audinot Nicolas Leclerc

The nanostructure of the active layer in polymer/fullerene bulk heterojunction solar cells is known to have a strong impact on the device performances. Controlling the polymer/fullerene blend morphology is therefore particularly important. In this work, a rod-coil block copolymer, based on a regioregular poly(3-hexylthiophene) electron-donor rod block and a C60-grafted coil block, is used as compatibilizer and its influences on the thin film morphology as well as the photovoltaic performances are investigated. It is shown that a small fraction of compatibilizer can enhance the device performances in an otherwise non-optimized process. At higher fractions or long annealing times however, the fullerene-grafted copolymer is found to behave as a nucleation center and triggers the formation of fullerene crystals.

Active layer

10.1051/epjap/2011110150

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Citations (20)

Nanostructure of self-assembled rod-coil block copolymer films for photovoltaic applications

Thin Solid Films (2006)

T. Heiser George Adamopoulos Martin Brinkmann Umberto Giovanella S. Ould‐Saad

10.1016/j.tsf.2005.12.134

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Citations (43)

Étude de l'intercalation de dopants dans les cristaux de polymères semi-conducteurs par microscopie électronique en transmission (TEM), spectroscopie de rétrodiffusion de Rutherford (RBS) et spectroscopie UV-vis-NIR polarisée

Yuhan Zhong Shubhradip Guchait Viktoriia Untilova Laurent Hermann D. Müller

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Absorption Tuning of Monosubstituted Triazatruxenes for Bulk Heterojunction Solar Cells

Organic Letters (2011)

Thomas Bura Nicolas Leclerc Sadiara Fall P. Lévêque T. Heiser

A series of triazatruxene (TAT)-functionalized Bodipy dyes were prepared by a sequence of reactions involving either cross-coupling reactions promoted by Pd complexes or a Knoevenagel reaction leading to a vinyl linker. The new dyes show large absorption coefficients and fluorescence quantum yields as well as interesting electrochemical properties. The blue dyes of this series exhibit interesting photovoltaic effects (VOC = 0.83 V, JSC = 3.6 mA/cm2, efficiency 0.9%) in bulk heterojunction solar cells, due to the good hole mobility imported by the TAT entity.

Knoevenagel condensation

BODIPY

Linker

Quantum Efficiency

Coupling reaction

10.1021/ol202443g

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Citations (71)

Nanostructured rod/coil block copolymers for photovoltaic applications

HAL (Le Centre pour la Communication Scientifique Directe) (2006)

Sophie Barrau T. Heiser M. R. Brinkman Fanny Richard Cyril Brochon

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How far does the charge state affect the iron behavior in silicon?

Applied Physics Letters (1991)

T. Heiser A. Mesli

Low-temperature precipitation of neutral interstitial iron in n-type silicon is investigated by means of photocapacitance measurements. Isothermal kinetics as well as iron depth profiles are observed which agree very well with an outdiffusion mechanism of iron to the sample surface. From these data the diffusion coefficient of neutral iron in silicon could be determined. Comparison with published results on positively charged iron in p-type silicon reveals a higher stability of neutral iron as well as a charge state dependence of its diffusion mechanism.

Isothermal process

10.1063/1.104938

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Citations (22)

Spirophenylacridine‐2,7‐(diphenylphosphineoxide)‐fluorene: A Bipolar Host for High‐Efficiency Single‐Layer Blue Phosphorescent Organic Light‐Emitting Diodes

Advanced Optical Materials (2019)

Fabien Lucas Olzhas A. Ibraikulov Cassandre Quinton Lambert Sicard T. Heiser

Abstract Herein, a high‐efficiency host material for single‐layer phosphorescent organic light‐emitting diodes (SL‐PhOLEDs) is reported. This host material is synthesized via an efficient approach and is constructed on the association of an electron‐rich phenylacridine unit connected by a spiro carbon atom to an electron‐deficient 2,7‐bis(diphenylphosphineoxide)‐fluorene. In addition to a high E T value and adequate highest occupied molecular orbital/lowest unoccupied molecular orbital energy levels, the key point in this molecular design is the suitable balance between hole and electron mobilities, which leads to a high‐performance blue SL‐PhOLED with an external quantum efficiency of 17.6% (current efficiency = 37.8 cd A −1 and power efficiency = 37.1 lm W −1 ) and a low V on of 2.5 V. This performance shows that the molecular design of the present host fulfills the criteria required for high‐efficiency SL‐PhOLEDs. The present performance is one of the highest reported to date for blue SL‐PhOLEDs and more importantly shows the potential of such a molecular design to reach very high‐performance single‐layer devices.

Quantum Efficiency

HOMO/LUMO

Electrical efficiency

10.1002/adom.201901225

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Citations (47)