Optimization of spray coating for the fabrication of sequentially deposited planar perovskite solar cells

Mehran Habibi; Mohammad-Reza Ahmadian-Yazdi; Morteza Eslamian

doi:10.1117/1.JPE.7.022003

1 June 2017 Optimization of spray coating for the fabrication of sequentially deposited planar perovskite solar cells

Mehran Habibi, Mohammad-Reza Ahmadian-Yazdi, Morteza Eslamian

Author Affiliations +

Journal of Photonics for Energy, Vol. 7, Issue 2, 022003 (June 2017). https://doi.org/10.1117/1.JPE.7.022003

Abstract

We use facile coating techniques including spray coating and drop casting to fabricate methylammonium lead iodide perovskite solar cells through a two-step sequential deposition approach. In the first step, for the deposition of the lead iodide, spray coating substitutes for the commonly used lab-scale spin coating, while the operating parameters of the former process are optimized to achieve a fully covered and uniform film of lead iodide. In the second step, to deposit methylammonium iodide atop the lead iodide layer to form methylammonium lead iodide perovskite, dip-coating process is replaced by the touch-free drop casting and scalable pulsed-spray coating. It is found that the performance of the perovskite films and devices made by pulsed-spray coating and drop casting is similar to those prepared by dip coating, while the large-scale production capabilities of such methods beside the low material consumptions of drop casting prove their potential to replace dip coating in large-scale manufacturing of perovskite solar cells. The champion devices fabricated by spray-drop and spin-drop techniques demonstrated power conversion efficiencies of 6.92% and 9.48%, respectively. It is expected that device fabrication in a low-humidity environment using the optimized parameters and optimization of other layers will result in higher efficiencies.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Mehran Habibi, Mohammad-Reza Ahmadian-Yazdi, and Morteza Eslamian "Optimization of spray coating for the fabrication of sequentially deposited planar perovskite solar cells," Journal of Photonics for Energy 7(2), 022003 (1 June 2017). https://doi.org/10.1117/1.JPE.7.022003

Received: 24 March 2017; Accepted: 10 May 2017; Published: 1 June 2017

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