Issue 16, 2021

Gas flow-assisted vacuum drying: identification of a novel process for attaining high-quality perovskite films

Abstract

Controlling the nucleation and crystal growth in solution-processed metal halide perovskite (MHP) thin films is the pivotal point in fabricating homogenous and pinhole-free films. Using scalable coating and printing techniques, vacuum and gas flow-assisted drying processes turn out to be the most promising methods to induce nucleation and crystallization. Yet, the exact interplay and nature of these processes are unclear. In our work, we optically monitor these processes in situ. For the first time, we can show that a controlled venting of the vacuum chamber and the use of a subsequent gas flow are key to achieve homogenous nucleation. Utilizing this gas flow-assisted vacuum drying process, we find that regular, optically dense and pinhole-free MHP layers can be fabricated via inkjet printing, which yield solar cells with a power conversion efficiency of 16%, as compared to 4.5% for vacuum drying.

Graphical abstract: Gas flow-assisted vacuum drying: identification of a novel process for attaining high-quality perovskite films

Supplementary files

Article information

Article type
Communication
Submitted
07 Jūn. 2021
Accepted
22 Jūl. 2021
First published
23 Jūl. 2021
This article is Open Access
Creative Commons BY license

Mater. Adv., 2021,2, 5365-5370

Gas flow-assisted vacuum drying: identification of a novel process for attaining high-quality perovskite films

F. Mathies, E. R. Nandayapa, G. Paramasivam, M. F. Al Rayes, V. R. F. Schröder, C. Rehermann, E. J. W. List-Kratochvil and E. L. Unger, Mater. Adv., 2021, 2, 5365 DOI: 10.1039/D1MA00494H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements