Ultra-Efficient Optical Gain and Lasing in MDACl2-Doped Perovskite Thin Films

Shanshan Zhang, Luis Gutierrez Arzaluz, Jun Yin, Nimer Wehbe, Rounak Naphade, Partha Maity, Osman Bakr, Anton V. Malko, Omar F. Mohammed

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Solution-processed perovskite materials have been enticing candidates for optical gain and lasing media because of their low cost, remarkable color purity, facile bandgap tunability, and high absorption cross-section. However, it is difficult, if not impossible, for them to highly amplify light with stable operations because they experience severe non-radiative emission losses due to their high density of surface and bulk defect centers and irregular composition. Here, we report that incorporating 5% of methylenediammonium dichloride (MDACl2) into mixed perovskite systems leads to a drastic reduction in the density of iodide interstitials and surface recombination losses. Subsequently, we record that MDA-treated, cavity-free thin perovskite films exhibit very photostable and ultra-low threshold amplified spontaneous emission of
Original languageEnglish (US)
JournalChemistry of Materials
StatePublished - Oct 25 2022

ASJC Scopus subject areas

  • Materials Chemistry
  • General Chemical Engineering
  • General Chemistry


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