Deep-Blue Perovskite Single-Mode Lasing through Efficient Vapor-Assisted Chlorination

Joao M. Pina, Darshan H. Parmar, Golam Bappi, Chun Zhou, Hitarth Choubisa, Maral Vafaie, Amin M. Najarian, Koen Bertens, Laxmi Kishore Sagar, Yitong Dong, Yuan Gao, Sjoerd Hoogland, Makhsud I. Saidaminov, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Metal halide perovskites have emerged as promising candidates for solution-processed laser gain materials, with impressive performance in the green and red spectral regions. Despite exciting progress, deep-blue—an important wavelength for laser applications—remains underexplored; indeed, cavity integration and single-mode lasing from large-bandgap perovskites have yet to be achieved. Here, a vapor-assisted chlorination strategy that enables synthesis of low-dimensional CsPbCl3 thin films exhibiting deep-blue emission is reported. Using this approach, high-quality perovskite thin films having a low surface roughness (RMS ≈ 1.3 nm) and efficient charge transfer properties are achieved. These enable us to document low-threshold amplified spontaneous emission. Levering the high quality of the gain medium, vertical-cavity surface-emitting lasers with a low lasing threshold of 6.5 µJ cm−2 are fabricated. This report of deep-blue perovskite single-mode lasing showcases the prospect of increasing the range of deep-blue laser sources.

Original languageEnglish (US)
Article number2006697
JournalAdvanced Materials
Issue number5
StatePublished - Feb 4 2021


  • deep-blue light emission
  • halide exchange
  • lasing
  • perovskites
  • vertical-cavity surfaceemitting lasers

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Deep-Blue Perovskite Single-Mode Lasing through Efficient Vapor-Assisted Chlorination'. Together they form a unique fingerprint.

Cite this