Continuous wave amplified spontaneous emission in phase-stable lead halide perovskites

Philipp Brenner, Ofer Bar-On, Marius Jakoby, Isabel Allegro, Bryce S. Richards, Ulrich W. Paetzold, Ian A. Howard, Jacob Scheuer and Uli Lemmer ()
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Philipp Brenner: Karlsruhe Institute of Technology
Ofer Bar-On: Tel-Aviv University
Marius Jakoby: Karlsruhe Institute of Technology
Isabel Allegro: Karlsruhe Institute of Technology
Bryce S. Richards: Karlsruhe Institute of Technology
Ulrich W. Paetzold: Karlsruhe Institute of Technology
Ian A. Howard: Karlsruhe Institute of Technology
Jacob Scheuer: Tel-Aviv University
Uli Lemmer: Karlsruhe Institute of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Sustained stimulated emission under continuous-wave (CW) excitation is a prerequisite for new semiconductor materials being developed for laser gain media. Although hybrid organic-inorganic lead-halide perovskites have attracted much attention as optical gain media, the demonstration of room-temperature CW lasing has still not been realized. Here, we present a critical step towards this goal by demonstrating CW amplified spontaneous emission (ASE) in a phase-stable perovskite at temperatures up to 120 K. The phase-stable perovskite maintains its room-temperature phase while undergoing cryogenic cooling and can potentially support CW lasing also at higher temperatures. We find the threshold level for CW ASE to be 387 W cm-2 at 80 K. These results indicate that easily-fabricated single-phase perovskite thin films can sustain CW stimulated emission, potential at higher temperatures as well, by further optimization of the material quality in order to extend the carrier lifetimes.

Date: 2019
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DOI: 10.1038/s41467-019-08929-0

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