DataVXAdvanced Optical MaterialsPaper
journal article·2020-10

Low Amplified Spontaneous Emission and Lasing Thresholds from Hybrids of Fluorenes and Vinylphenylcarbazole

Atul Shukla, Van T. N. Mai, A. M. Chathuranganie Senevirathne, Ilene Allison, Sarah K. M. McGregor, Romain J. Lepage, Michael Wood, Toshinori Matsushima, Evan G. Moore, Elizabeth H. Krenske, Atula S. D. Sandanayaka, Chihaya Adachi, Ebinazar B. Namdas, Shih‐Chun Lo

Advanced Optical Materials· Volume 8· Issue 20
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Source abstract

Abstract

Abstract Organic semiconductor dyes have attracted high interest as laser gain media owing to their judicious features of solution processability, lightweight, high mechanical flexibility, high wavelength‐tunability, and low‐cost manufacture. In this work, fluorene‐carbazolylstyryl hybrids are reported, SFCz and BSTFCz, as new solution processable organic semiconductor laser dyes to show high molar extinction coefficients (up to 1.98 × 105 dm3 mol−1 cm−1), high photoluminescence quantum yields (up to 81 ± 4%), high radiative decay constants (up to 1.24 × 109 s−1), and low film amplified spontaneous emission thresholds (down to 0.70 µJ cm−2). By using mixed‐order distributed feedback laser structures, extremely low lasing threshold of 0.5 µJ cm−2 is achieved. To elucidate their electroluminescent properties, simple solution‐processed organic light‐emitting diodes based on the new materials are fabricated to show good external quantum efficiencies (2%) and high brightness (≈2800 cd m−2). The results indicate the ease in material synthesis and fabrication enabling solution‐processed low‐threshold lasing toward future injection laser.
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Research context

Electronic materials

OpenAlex topics: Organic Light-Emitting Diodes Research · Luminescence and Fluorescent Materials · Photochemistry and Electron Transfer Studies

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Affiliations

Centre for Organic Photonics & Electronics The University of Queensland Brisbane QLD 4072 Australia

School of Mathematics and Physics The University of Queensland Brisbane QLD 4072 Australia

School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia

Center for Organic Photonics and Electronics Research (OPERA) Kyushu University Fukuoka 819‐0395 Japan

JST ERATO Adachi Molecular Exciton Engineering Project c/o Center for Organic Photonics and Electronics Research (OPERA) Kyushu University Nishi Fukuoka 819‐0395 Japan

International Institute for Carbon Neutral Energy Research (WPI‐I2CNER) Kyushu University Nishi Fukuoka 819‐0395 Japan

Department of Physical Sciences and Technologies Faculty of Applied Sciences Sabaragamuwa University of Sri Lanka Belihuloya 70140 Sri Lanka

Funding

Australian Research Council · Department of Industry, Innovation and Science, Australian Government · Japan Science and Technology Agency · Japan Society for the Promotion of Science

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