Abstract
We have investigated annealing behaviours of quench-deposited films of the binary CsI–PbI2system by in situ optical absorption spectroscopy. Variousfilms composed of multiple crystalline phases of CsPbI3 and/or Cs4PbI6 as well as ofCsI and/or PbI2are obtained, depending on the mixing ratio of the CsI and PbI2.It is difficult to prepare films purely composed of a single CsPbI3 or Cs4PbI6phase alone. However, it is possible to obtain films where crystallites of either CsPbI3 or Cs4PbI6coexist with the CsI phase. Using such films, we measurethe fundamental optical absorption spectrum of CsPbI3 and Cs4PbI6 for the firsttime. Cs4PbI6exhibits stronger oscillator-like absorption compared to CsPbI3,due to the localized nature of both the Pb 6s and 6p states.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
