Enhanced emissive and lasing characteristics of nano-crystalline MAPbBr3 films grown via anti-solvent precipitation
Abstract
Control of the nano-scale crystal size distribution in films of organic-inorganic lead-tri-bromide perovskites is achieved through a recently reported solution-based, anti-solvent treatment method [H. Cho et al., Science 350, 1222 (2015)]. The treated films are shown to be high quality, optically smooth with excellent emissive and optical gain properties including higher photoluminescence yield and reduced threshold for laser action. The improved lasing is shown to originate from a synergistic combination of a reduction in waveguide losses and a decrease in the non-radiative decay rate of the excited state population, compared to untreated films. The net gain is increased by a factor of two upon anti-solvent treatment and reaches a respectable value of ≈300 cm−1.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 10, 2016
- Source ID
- 10.1063/1.4964417
Entities
People
- C. Zhang
- Dachun Sun
- E. Lafalce
- Y. Zhai
- Z. V. Vardeny
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- United States Department of Energy
- University of Utah