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

Mathies, Florian (author)
Helmholtz Association of German Research Centers
Nandayapa, Edgar R. (author)
Helmholtz Association of German Research Centers
Paramasivam, Gopinath (author)
Helmholtz Association of German Research Centers
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Al Rayes, Mohammad F. (author)
Helmholtz Association of German Research Centers
Schröder, Vincent R.F. (author)
Humboldt University of Berlin,Helmholtz Association of German Research Centers
Rehermann, Carolin (author)
Helmholtz Association of German Research Centers
List-Kratochvil, Emil J.W. (author)
Helmholtz Association of German Research Centers,Humboldt University of Berlin
Unger, Eva L. (author)
Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
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 (creator_code:org_t)
2021
2021
English 6 s.
In: Materials Advances. - : Royal Society of Chemistry (RSC). - 2633-5409. ; 2:16, s. 5365-5370
Related links:
http://dx.doi.org/10... (free)
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  • Journal article (peer-reviewed)
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  • 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.

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

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