Volume 60, Issue 16 pp. 9114-9119
Research Article

Cascaded Excited-State Intramolecular Proton Transfer Towards Near-Infrared Organic Lasers Beyond 850 nm

Jun-Jie Wu

Jun-Jie Wu

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

These authors contributed equally to this work.

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Dr. Ming-Peng Zhuo

Dr. Ming-Peng Zhuo

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

These authors contributed equally to this work.

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Dr. Runchen Lai

Dr. Runchen Lai

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, Dalian, Liaoning, 116000 P. R. China

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Sheng-Nan Zou

Sheng-Nan Zou

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Chang-Cun Yan

Chang-Cun Yan

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Yi Yuan

Yi Yuan

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Sheng-Yi Yang

Sheng-Yi Yang

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Guo-Qing Wei

Guo-Qing Wei

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Dr. Xue-Dong Wang

Corresponding Author

Dr. Xue-Dong Wang

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

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Prof. Liang-Sheng Liao

Corresponding Author

Prof. Liang-Sheng Liao

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123 P. R. China

Institute of Organic Optoelectronics, JITRI, Wujiang, Suzhou, Jiangsu, 215211 P. R. China

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First published: 03 February 2021
Citations: 83

Graphical Abstract

Six-level energy systems are constructed through the cascaded occurrence of excited-state intramolecular proton transfer consisting of a first ultrafast proton transfer of <430 fs and a following dominant and irreversible proton transfer of ca. 1.6 ps, which support the NIR single-mode lasing at 854 nm for exploiting energy-level systems of OSSLs, especially at the NIR region from 780 to 2500 nm.

Abstract

Near-infrared (NIR) organic solid-state lasers play an essential role in applications ranging from laser communication to infrared night vision, but progress in this area is restricted by the lack of effective excited-state gain processes. Herein, we originally proposed and demonstrated the cascaded occurrence of excited-state intramolecular proton transfer for constructing the completely new energy-level systems. Cascading by the first ultrafast proton transfer of <430 fs and the subsequent irreversible second proton transfer of ca. 1.6 ps, the stepwise proton transfer process favors the true six-level photophysical cycle, which supports efficient population inversion and thus NIR single-mode lasing at 854 nm. This work realizes longest wavelength beyond 850 nm of organic single-crystal lasing to date and originally exploits the cascaded excited-state molecular proton transfer energy-level systems for organic solid-state lasers.

Conflict of interest

The authors declare no conflict of interest.

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