Nicolas Leclerc

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

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Antoine Mirloup

Centre National de la Recherche Scientifique

Martin Brinkmann

Université de Strasbourg

Ashraful Islam

National Institute for Materials Science

Jae‐Joon Lee

Dongguk University

T. Heiser

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

P. Lévêque

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

Towhid H. Chowdhury

National Institute for Materials Science

Raymond Ziessel

Newcastle University

Liyuan Han

Shanghai Jiao Tong University

M. Abdel‐Shakour

Assiut University

Cooperative Institutions

Centre National de la Recherche Scientifique

Université de Strasbourg

Institut de Chimie

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

Institut de Physique et Chimie des Matériaux de Strasbourg

Institut Européen de Chimie et Biologie

Institut Charles Sadron

National Institute for Materials Science

University of Tsukuba

Weatherford College

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Molecular Engineering of New Thienyl‐Bodipy Dyes for Highly Efficient Panchromatic Sensitized Solar Cells

Advanced Energy Materials (2014)

Chuanjiang Qin Antoine Mirloup Nicolas Leclerc Ashraful Islam Ahmed El‐Shafei

Stepwise construction of thienyl-bodipy dyes bearing a carboxylic acid or an acrylate function is realized. The color of the dye is tuned by the presence of one or two vinyl-thienyl arms. These highly colored dyes exhibit strong absorption spanning to 760 nm when anchored to TiO2 nanoparticles. The use of two complementary absorbing dyes produces a conversion efficiency of 6.43% and a incident photon-to-current conversion efficiency (ICPE) plateau of about 70% between 500 and 700 nm. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

BODIPY

Panchromatic film

10.1002/aenm.201400085

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Citations (50)

Bringing Conducting Polymers to High Order: Toward Conductivities beyond 10⁵ S cm⁻¹ and Thermoelectric Power Factors of 2 mW m⁻¹ K⁻²

Advanced Energy Materials (2019)

Vishnu Vijayakumar Yuhan Zhong Viktoriia Untilova Mounib Bahri Laurent Herrmann

Abstract Here, an effective design strategy of polymer thermoelectric materials based on structural control in doped polymer semiconductors is presented. The strategy is illustrated for two archetypical polythiophenes, e.g., poly(2,5‐bis(3‐dodecyl‐2‐thienyl)thieno[3,2‐ b ]thiophene) (C 12 ‐PBTTT) and regioregular poly(3‐hexylthiophene) (P3HT). FeCl 3 doping of aligned films results in charge conductivities up to 2 × 10 5 S cm −1 and metallic‐like thermopowers similar to iodine‐doped polyacetylene. The films are almost optically transparent and show strongly polarized near‐infrared polaronic bands (dichroic ratio >10). The comparative study of structure–property correlations in P3HT and C 12 ‐PBTTT identifies three conditions to obtain conductivities beyond 10 5 S cm −1 : i) achieve high in‐plane orientation of conjugated polymers with high persistence length; ii) ensure uniform chain oxidation of the polymer backbones by regular intercalation of dopant molecules in the polymer structure without disrupting alignment of π‐stacked layers; and iii) maintain a percolating nanomorphology along the chain direction. The highly anisotropic conducting polymer films are ideal model systems to investigate the correlations between thermopower S and charge conductivity σ. A scaling law S ∝ σ −1/4 prevails along the chain direction, but a different S ∝ −ln(σ) relation is observed perpendicular to the chains, suggesting different charge transport mechanisms. The simultaneous increase of charge conductivity and thermopower along the chain direction results in a substantial improvement of thermoelectric power factors up to 2 mW m −1 K −2 in C 12 ‐PBTTT.

Polyacetylene

10.1002/aenm.201900266

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Citations (170)

Heterogeneous Oriented Structure model of thermoelectric transport in conducting polymers

Scientific Reports (2023)

Patrice Limelette Nicolas Leclerc Martin Brinkmann

Abstract Understanding transport phenomena in conducting polymers (CP) is a main issue in order to optimize their performance and despite intense investigations, the influence of their microstructure remains controversial. By analyzing the thermoelectric measurements performed on highly oriented and non-oriented CP films, we show that an Heterogeneous Oriented Structure (HOSt) model considering both ordered and disordered domains is able to account for the thermoelectric transport in CP. This model unveils the key role of the crystallinity, the anisotropy and the alignment degree of these domains. It points out the importance of the thermal conductivity in the interpretation of the thermopower $$\alpha $$ α and explains the frequently observed electrical conductivity $$\sigma $$ σ cut-off in the $$\alpha -\sigma $$ α - σ curves due to the disordered domains. By varying the alignment degree depending on the orientation and the anisotropy according to the face-on or the edge-on polymers conformation, the HOSt model successfully describes the overall measured thermoelectric properties by demonstrating its applicability to a wide variety of both oriented and non-oriented CP.

10.1038/s41598-023-48353-5

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Single Ether‐Based Side Chains in Conjugated Polymers: Toward Power Factors of 2.9 mW m⁻¹ K⁻²

Advanced Energy Materials (2021)

Pablo Durand Huiyan Zeng Till Biskup Vishnu Vijayakumar Viktoriia Untilova

Abstract Combining side chain engineering and controlled alignment of PBTTT is an effective strategy to produce oriented thin films with improved thermoelectric performance when doped sequentially with the acceptor molecule hexafluoro‐tetracyanonaphthoquinodimethane (F 6 TCNNQ). The substitution of linear alkyl side‐chains ( n ‐C 12 ) with a chain of identical length including an ether function ( n ‐C 7 OC 4 ) leads to a new class of slightly polar PBTTT polymers, preserving the ease of synthesis and air stability of alkylated PBTTTs. This side‐chain modification improves the structural order of PBTTT backbones and the thermo‐mechanical properties of the polymer. It then can be oriented by high temperature rubbing up to 240 ° C to reach very high dichroic ratios up to 20 thanks to enhanced cohesive forces within side‐chain layers. The side chain polarity of n ‐C 7 OC 4 helps to tune the polymer‐dopant interactions. A multi‐technique approach demonstrates that F 6 TCNNQ dopants are randomly oriented in the disordered side chain layers of n ‐C 7 OC 4 with some evidence of dopant clustering. The combination of improved alignment and random orientation of intercalated F 6 TCNNQ dopants helps reach a very high charge conductivity σ = 5 ⋅ 10 4 S cm −1 and a record power factor of 2.9 mW m −1 K −2 in the polymer chain direction.

Side chain

10.1002/aenm.202103049

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Citations (39)

A Label‐Like Monolithic Organic Thermoelectric Generator Enabled by Local Inkjet Doping of Aligned Polymer Films

Advanced Energy Materials (2025)

Nathan Pataki James Shubhradip Guchait Badr Jismy Nicolas Leclerc Adrica Kyndiah

Abstract The proliferation of distributed microelectronics and sensors necessitates adaptable, scalable, and cost‐effective power supplies. Organic thermoelectric generators (TEGs) that promise to harness heat sustainably and cost‐effectively are seen as pivotal elements in shaping future sensor infrastructures. Recent strides in morphological control through the alignment of conjugated polymer backbones have enhanced the thermoelectric performance of doped organic semiconductors to record values, matching expectations for real applications. However, the hurdles in crafting and deploying organic TEGs effectively exploiting aligned polymer films remain unexplored. This work presents a design and fabrication method to incorporate aligned films into a thin label‐like TEG. Thin films of regioregular poly(3‐hexylthiophene) (P3HT) and poly(2,5‐bis((7‐butoxyheptyl)thiophen‐2‐yl)thieno[3,2‐ b ]thiophene) (PBTTT‐ 8 O) are aligned via high‐temperature rubbing technique inducing a high degree of anisotropy in their charge transport properties. The crystal structure and anisotropy of the films are exploited to realize monolithic TEGs by patterning conductive thermoelements via local inkjet doping of films transferred on ultrathin parylene substrates. The TEGs based on aligned P3HT and PBTTT‐ 8 O exhibit exceptional TEG power factors of 0.33 and 1.04 nW cm −2 K −2 , respectively. Lastly, as a proof‐of‐concept use case for the TEGs, a thermoelectrically‐powered volume‐indicating label is presented as a potential application in the healthcare and food industries.

Thermoelectric generator

10.1002/aenm.202404656

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Citations (0)

Cross-conjugated BODIPY pigment for highly efficient dye sensitized solar cells

Sustainable Energy & Fuels (2020)

Md. Faiz Shah Antoine Mirloup Towhid H. Chowdhury Alexandra Sutter Abdulkader S. Hanbazazah

In this study, we report a new BODIPY-based design, called the cross-conjugated design, that takes advantage of the α- and β-position functionalization of the BODIPY core.

BODIPY

Surface Modification

10.1039/c9se01090d

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Citations (14)

Triazatruxene‐Diketopyrrolopyrrole Dumbbell‐Shaped Molecules as Photoactive Electron Donor for High‐Efficiency Solution Processed Organic Solar Cells

Advanced Energy Materials (2013)

Thomas Bura Nicolas Leclerc R. Bechara P. Lévêque T. Heiser

Stepwise construction of functional triazatruxene platforms allow linking to preorganized diketopyrrolopyrrole bearing thienyl subunits. These dyes exhibit strong absorption until 750 nm in thin films and show favorable redox activity allowing producing efficient organic solar cells when blended in solution with PC71BM. A maximum power conversion efficiency of 5.3% was obtained. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

10.1002/aenm.201300240

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Citations (67)

Rational Engineering of BODIPY‐Bridged Trisindole Derivatives for Solar Cell Applications

ChemSusChem (2017)

İbrahim Bulut Quentin Huaulmé Antoine Mirloup Patricia Chávez Sadiara Fall

Boron dipyrromethene (BODIPY) and its derivatives are known to be efficient photon-harvesting chromophores. However, their study as active materials in bulk heterojunction (BHJ) solar cells is still scarce. In this study, the development of new synthetic ways to design original BODIPY-based dumbbell-shape molecules, including a first 2,3,5,6-tetravinyl aromatic BODIPY molecule, is reported. High fill factors can be obtained in BHJ solar cells when blended with a fullerene derivative, leading to a new record BODIPY-based power conversion efficiency of 5.8 %.

BODIPY

Rational design

Molecular engineering

10.1002/cssc.201700465

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Citations (50)

A near-infrared thienyl-BODIPY co-sensitizer for high-efficiency dye-sensitized solar cells

Sustainable Energy & Fuels (2019)

Md. Faiz Shah Antoine Mirloup Towhid H. Chowdhury Sutter Alexandra Abdulkader S. Hanbazazah

Two NIR BODIPY dyes T′₂P₂A and T′′₂P₂A were synthesized and used as photosensitizers in dye sensitized solar cells (DSSCs).

BODIPY

10.1039/c9se00300b

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Citations (14)

Solar Cells: Triazatruxene‐Diketopyrrolopyrrole Dumbbell‐Shaped Molecules as Photoactive Electron Donor for High‐Efficiency Solution Processed Organic Solar Cells (Adv. Energy Mater. 9/2013)

Advanced Energy Materials (2013)

Thomas Bura Nicolas Leclerc R. Bechara P. Lévêque T. Heiser

Dumbbell-shaped molecules can be created by linking functional triazatruxene platforms to highly fluorescent diketopyrrolopyrrole dyes. The association with [6,6]-phenyl-C71-butyric acid methyl ester [PC71BM] electron acceptor produces a self-supporting association capable of photon absorption over a large window and of charge separation in bulk heterojunction solar cells, giving rise to efficient photo-to-current conversion reaching 5.3%. On page 1118, Nicolas Leclerc, Raymond Ziessel, and co-workers describe how these green materials are prepared and studied within the framework of organic solar cells.

Electron acceptor

Dumbbell

Hybrid solar cell

Electron donor

10.1002/aenm.201370035

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Citations (2)