Photovoltaic and optical properties of perovskite thin films fabricated using Marangoni flow assisted electrospraying

Som Sarang, Hidetaka Ishihara, Yen Chang Chen, Oliver Lin, Vincent C. Tung, Sayantani Ghosh*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We have developed an electrospraying technique inspired from Marangoni flow seen in nature. We demonstrate our ability to synthesise highly crystalline uniform perovskite thin films with enhanced coverage and high absorption. Due to a difference in the vapour pressure of DMSO and NMP, a gradient force is developed that helps in propagating the incoming precursor droplet to coalesce and merge with other droplets thus inducing a dynamic self-assembly within the thin film. This results in thin films with high uniformity and good morphological and topological characteristics, that collectivelty resulted in a respectable PCE of greater than 14%. Optical studies are conducted in parallel to better understand the energy phase space of perovskite crystals. The high temperature tetragonal phase showed a high recombination rate of 180 ns, ideal for photovoltaic performances, while the low temperature measurements reveal considerable complexity in spectral and dynamic properties that demand further invesgtiation.

Original languageEnglish (US)
Title of host publicationOrganic Photonic Materials and Devices XVIII
EditorsFrancois Kajzar, Christopher E. Tabor, Toshikuni Kaino, Yasuhiro Koike
ISBN (Electronic)9781628419801
StatePublished - 2016
Externally publishedYes
EventOrganic Photonic Materials and Devices XVIII - San Francisco, United States
Duration: Feb 15 2016Feb 17 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOrganic Photonic Materials and Devices XVIII
Country/TerritoryUnited States
CitySan Francisco

Bibliographical note

Publisher Copyright:
© 2016 SPIE.

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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