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Preparation of methylammonium lead halide perovskite thin films by dual feed ultrasonic spray method

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2019, 29(1), pp.6~11
  • DOI : 10.6111/JKCGCT.2019.29.1.006
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : November 30, 2018
  • Accepted : January 16, 2019
  • Published : February 28, 2019

Rock Yoon Kim 1,  Tae Heui Kim 1,  Kyung Bong Park 1

1안동대학교

Accredited

ABSTRACT

Methylammonium lead halide (MAPbX3, X = I, Br) thin films, used as the light absorber of perovskite solar cells, were prepared using the dual feed ultrasonic spray method. Going through a deposition at a substrate temperature of below 60 o C and then a final heat treatment at 75 o C for 5 minutes using dual feed ultrasonic spray method, MAPbI3 single phase could be formed. Whereas undergoing a deposition at temperatures above 80 o C, the spheroidal grains could be changed into rod-shaped fractal structures due to the decomposition of the perovskite phase. Furthermore, using the same method at a higher heat treatment temperature of 100 o C, MAPbI3−xBrx thin films could also be formed from MAPbI3 and MAPbIBr2 solution.

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