Can Trihalide Lead Perovskites Support Continuous Wave Lasing?

Amplified spontaneous emission in methylammonium lead halide perovskites over transients as long as 100 ns at 200 K temperature is demonstrated. Optical spectroscopy measurements highlight runaway heating dynamics limiting the duration of optical amplification, but also suggest materials and device improvements to circumvent such limitations and allow true continuous wave operation. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.