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Proceedings Paper

Losses, gain, and lasing in organic and perovskite active materials (Conference Presentation)
Author(s): Neda Pourdavoud; Thomas J. Riedl

Paper Abstract

Organic solid state lasers (OSLs) based on semiconducting polymers or small molecules have seen some significant progress over the past decade. Highly efficient organic gain materials combined with high-Q resonator geometries (distributed feedback (DFB), VCSEL, etc.) have enabled OSLs, optically pumped by simple inorganic laser diodes or even LEDs. However, some fundamental goals remain to be reached, like continuous wave (cw) operation and injection lasing. I will address various loss mechanisms related to accumulated triplet excitons or long-lived polarons that in combination with the particular photo-physics of organic gain media state the dominant road-blocks on the way to reach these goals. I will discuss the recent progress in fundamental understanding of these loss processes, which now provides a solid basis for modelling, e.g. of laser dynamics. Avenues to mitigate these fundamental loss mechanisms, e.g. by alternative materials will be presented. In this regard, a class of gain materials based on organo-lead halide perovskites re-entered the scene as light emitters, recently. Enjoying a tremendous lot of attention as active material for solution processed solar cells with a 20+% efficiency, they have recently unveiled their exciting photo-physics for lasing applications. Optically pumped lasing in these materials has been achieved. I will discuss some of the unique properties that render this class of materials a promising candidate to overcome some of the limitations of “classical” organic gain media.

Paper Details

Date Published: 4 November 2016
PDF: 1 pages
Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 99411G (4 November 2016); doi: 10.1117/12.2238700
Show Author Affiliations
Neda Pourdavoud, Bergische Univ. Wuppertal (Germany)
Thomas J. Riedl, Bergische Univ. Wuppertal (Germany)

Published in SPIE Proceedings Vol. 9941:
Organic Light Emitting Materials and Devices XX
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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