Novel growth techniques for the deposition of high-quality perovskite thin films

Annie Ng, Zhiwei Ren, Gang Li, Aleksandra B. Djurišić, Charles Surya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We present investigations on the growth of high quality CH3NH3PbI3 (MAPI) thin films using both vapor and solution techniques. Recent work on perovskite film growth indicates critical dependencies of the film quality on the nucleation and crystallization steps requiring: i.) uniform distribution of nucleation sites; and ii.) optimal crystallization rate that facilitates the growth of a compact, continuous film with low density of pinholes. Our work shows that the hybrid chemical vapor deposition technique (HCVD) technique is well suited for the deposition of evenly distributed nucleation sites and the optimization of the crystallization rate of the film through detailed monitoring of the thermal profile of the growth process. Signficant reduction in the defect states is recorded by annealing the perovskite films in O2. The results are consistent with theoretical studies by Yin et al. 1 on O and Cl passivation of the shallow states at the grain boundary of MAPI. Their work provides the theoretical basis for our experimental observations on the passivation of shallow states by oxygen annealing. High quality films were achieved through detailed management of the carrier gas composition and the thermal profile of the nucleation and crystallization steps.

Original languageEnglish
Title of host publicationOxide-Based Materials and Devices IX
PublisherSPIE
Volume10533
ISBN (Electronic)9781510615519
DOIs
Publication statusPublished - Jan 1 2018
EventOxide-Based Materials and Devices IX 2018 - San Francisco, United States
Duration: Jan 28 2018Feb 1 2018

Conference

ConferenceOxide-Based Materials and Devices IX 2018
CountryUnited States
CitySan Francisco
Period1/28/182/1/18

Keywords

  • high efficiency perovskite solar cells
  • hybrid chemical vapor deposition
  • oxygen annealing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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