Ultrastable Supramolecular Self‐Encapsulated Wide‐Bandgap Conjugated Polymers for Large‐Area and Flexible Electroluminescent Devices

Jinyi Lin; Bin Liu; Mengna Yu; Xuhua Wang; Zongqiong Lin; Xinwen Zhang; Chen Sun; Juan Cabanillas‐Gonzalez; Linghai Xie; Feng Liu; Changjin Ou; Lubing Bai; Yamin Han; Man Xu; Wensai Zhu; Trevor A. Smith; Paul N. Stavrinou; Donal D. C. Bradley; Wei Huang

doi:10.1002/adma.201804811

journal article·2019-01

Ultrastable Supramolecular Self‐Encapsulated Wide‐Bandgap Conjugated Polymers for Large‐Area and Flexible Electroluminescent Devices

Jinyi Lin, Bin Liu, Mengna Yu, Xuhua Wang, Zongqiong Lin, Xinwen Zhang, Chen Sun, Juan Cabanillas‐Gonzalez, Linghai Xie, Feng Liu, Changjin Ou, Lubing Bai, Yamin Han, Man Xu, Wensai Zhu, Trevor A. Smith, Paul N. Stavrinou, Donal D. C. Bradley, Wei Huang

Advanced Materials· Volume 31· Issue 1

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Source abstract

Abstract

Abstract Controlling chain behavior through smart molecular design provides the potential to develop ultrastable and efficient deep‐blue light‐emitting conjugated polymers (LCPs). Herein, a novel supramolecular self‐encapsulation strategy is proposed to construct a robust ultrastable conjugated polydiarylfluorene (PHDPF‐Cz) via precisely preventing excitons from interchain cross‐transfer/coupling and contamination from external trace H₂O/O₂. PHDPF‐Cz consists of a mainchain backbone where the diphenyl groups localize at the 9‐position as steric bulk moieties, and carbazole (Cz) units localize at the 4‐position as supramolecular π‐stacked synthon with the dual functionalities of self‐assembly capability and hole‐transport facility. The synergistic effect of the steric bulk groups and π‐stacked carbazoles affords PHDPF‐Cz as an ultrastable property, including spectral, morphological stability, and storage stability. In addition, PHDPF‐Cz spin‐coated gelation films also show thickness‐insensitive deep‐blue emission with respect to the reference polymers, which are suitable to construct solution‐processed large‐scale optoelectronic devices with higher reproducibility. High‐quality and uniform deep‐blue emission is observed in large‐area solution‐processed films. The electroluminescence shows high‐quality deep‐blue intrachain emission with a CIE (0.16, 0.12) and a very narrow full width at half‐maximum of 32 nm. Finally, large‐area and flexible polymer light‐emitting devices with a single‐molecular excitonic behavior are also fabricated. The supramolecular self‐encapsulation design provides an effective strategy to construct ultrastable LCPs for optoelectronic applications.

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Research context

Polymers Electronic materials

OpenAlex topics: Luminescence and Fluorescent Materials · Organic Electronics and Photovoltaics · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 China

Departments of Engineering Science and Physics and Division of Mathematical Physical and Life Sciences University of Oxford 9 Parks Road Oxford OX1 3PD UK

Department of Physics and Centre for Plastic Electronics The Blackett Laboratory Imperial College London Prince Consort Road London SW7 2AZ UK

Shaanxi Institute of Flexible Electronics (SIFE) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 Shaanxi China

Center for Molecular Systems and Organic Devices (CMSOD) Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China

ARC Centre of Excellence in Exciton Science School of Chemistry The University of Melbourne Parkville VIC 3010 Australia

Madrid Institute for Advanced Studies (IMDEA Nanociencia) Ciudad Universitaria de Cantoblanco Calle Faraday 9 Madrid 28049 Spain

Department of Engineering Science University of Oxford Parks Road Oxford OX1 3PD UK

Funding

National Natural Science Foundation of China · Ministerio de Economía y Competitividad

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