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, Uli Lemmer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

107 Scopus citations


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.

Original languageEnglish
Article number988
JournalNature Communications
Issue number1
StatePublished - 1 Dec 2019


FundersFunder number
Deutsche For-schungsgemeinschaftLE 878/17-1
Karlsruhe School of Optics & Photonics
Helmholtz Association


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