Engineering of ambient processing conditions to control solvent induced intermediate phase in mixed halide organic-inorganic perovskite (CH3NH3PbI3-xClx) film for efficient planar perovskite solar cells

Ashish Dubey, Eman A. Gaml, Nirmal Adhikari, Khan Mamun Reza, H. Zeyada, Qiquan Qiao

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

2 Scopus citations

Abstract

One of the challenges with organic-inorganic hybrid perovskite films, is its degradation from moisture present in ambient atmosphere, which severely restricts its crystallization process using thermal annealing in ambient air having high humidity levels. A widely used method for perovskite film crystallization is use of thermal annealing in inert atmosphere to rapidly crystallize the film in perovskite phase, immediately after its deposition. Herein, we have explored several methods of crystallization of mixed-halide perovskite (CH3NH3PbI3-xClx) film crystallization in ambient air with an aim to obtain high crystallinity and complete conversion to perovskite phase in ambient air assisted with and without thermal annealing. We optimized the crystallization process of perovskite film by exposing the film in ambient air, partially exposure to air followed by thermal annealing, exposing it to air-flow at room temperature. Perovskite films were spin coated inside the N2 filled glove box and immediately were taken outside in air with 40% relative humidity (RH). Crystallized mixed-halide perovskite films obtained from different approaches were then used to fabricate planar perovskite solar cells with device structure as ITO/PEDOT:PSS/CH3NH3PbI3-xClx/PC60BM/Rhodamine/Ag. It was concluded that humidity plays an important role in crystallization of perovskite films in ambient air, but additional treatment could lead to improved perovskite crystallinity.

Original languageEnglish (US)
Title of host publication2016 IEEE International Conference on Electro Information Technology, EIT 2016
PublisherIEEE Computer Society
Pages716-722
Number of pages7
ISBN (Electronic)9781467399852
DOIs
StatePublished - Aug 5 2016
Externally publishedYes
Event2016 IEEE International Conference on Electro Information Technology, EIT 2016 - Grand Forks, United States
Duration: May 19 2016May 21 2016

Publication series

NameIEEE International Conference on Electro Information Technology
Volume2016-August
ISSN (Print)2154-0357
ISSN (Electronic)2154-0373

Conference

Conference2016 IEEE International Conference on Electro Information Technology, EIT 2016
CountryUnited States
CityGrand Forks
Period5/19/165/21/16

Keywords

  • air crystallized
  • mixed-halide perovskite
  • moisture
  • Room temperature
  • solar cells
  • thermal annealed

ASJC Scopus subject areas

  • Computer Science Applications
  • Information Systems
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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