DataVXAdvanced MaterialsPaper
journal article·2017-09Open access

Highly Luminescent 2D‐Type Slab Crystals Based on a Molecular Charge‐Transfer Complex as Promising Organic Light‐Emitting Transistor Materials

Sang Kyu Park, Jin Hong Kim, Tatsuhiko Ohto, Ryo Yamada, Andrew O. F. Jones, Dong Ryeol Whang, Illhun Cho, Sangyoon Oh, Seung Hwa Hong, Ji Eon Kwon, Jong H. Kim, Yoann Olivier, Roland Fischer, Roland Resel, Johannes Gierschner, Hirokazu Tada, Soo Young Park

Advanced Materials· Volume 29· Issue 36
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Source abstract

Abstract

A new 2:1 donor (D):acceptor (A) mixed‐stacked charge‐transfer (CT) cocrystal comprising isometrically structured dicyanodistyrylbenzene‐based D and A molecules is designed and synthesized. Uniform 2D‐type morphology is manifested by the exquisite interplay of intermolecular interactions. In addition to its appealing structural features, unique optoelectronic properties are unveiled. Exceptionally high photoluminescence quantum yield (ΦF ≈ 60%) is realized by non‐negligible oscillator strength of the S1 transition, and rigidified 2D‐type structure. Moreover, this luminescent 2D‐type CT crystal exhibits balanced ambipolar transport (µh and µe of ≈10−4 cm2 V−1 s−1). As a consequence of such unique optoelectronic characteristics, the first CT electroluminescence is demonstrated in a single active‐layered organic light‐emitting transistor (OLET) device. The external quantum efficiency of this OLET is as high as 1.5% to suggest a promising potential of luminescent mixed‐stacked CT cocrystals in OLET applications.
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Research context

Electronic materials

OpenAlex topics: Luminescence and Fluorescent Materials · Perovskite Materials and Applications · Organic and Molecular Conductors Research

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

Affiliations

Center for Supramolecular Optoelectronic Materials Department of Materials Science and Engineering Seoul National University 1 Gwanak‐ro Gwanak‐gu Seoul 151‐744 South Korea

Graduate School of Engineering Science Osaka University 1‐3 Machikaneyama Toyonaka Osaka 560‐8531 Japan

Institute of Solid State Physics Graz University of Technology Graz 8010 Austria

Department of Applied Chemistry and Biological Engineering Department of Molecular Science and Technology Ajou University 206 Worldcup‐ro Yeongtong‐gu Suwon 443‐749 South Korea

Laboratory for Chemistry of Novel Materials Université de Mons Place du Parc 20 7000 Mons Belgium

Institute of Inorganic Chemistry Graz University of Technology Graz 8010 Austria

Madrid Institute for Advanced Studies IMDEA Nanoscience Calle Faraday 9 Ciudad Universitaria de Cantoblanco 28049 Madrid Spain

Funding

Seoul National University · National Research Foundation of Korea · Ministry of Science ICT and Future Planning

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