Nanoparticle Wetting Agent for Gas Stream-Assisted Blade-Coated Inverted Perovskite Solar Cells and Modules

ACS Applied Materials & Interfaces
Johannes KüffnerMichael Powalla

Abstract

Lab-scale perovskite solar cells (PSCs) have recently reached power conversion efficiencies (PCEs) of up to 25.2%. However, a reliable transfer of solution processing from spin coating to scalable printing techniques and a homogeneous deposition on large substrate sizes is challenging also caused by dewetting of the perovskite precursor solution on highly hydrophobic subjacent materials. In this work, we report the utilization of blade-coated nonconductive silicon oxide (SiO2) nanoparticles (NPs) as wetting agent for the precursor solution to enable the deposition of a homogeneous perovskite layer on the nonwetting hole transport layer (HTL). The NPs enhance the HTL surface energy, thus, wetting and homogeneous spreading of the precursor solution is strongly improved so that pinholes in the perovskite layer are avoided. In addition, we apply this concept for the first time for gas stream-assisted blade coating of PSCs and modules in the inverted (p-i-n) device architecture with poly(triaryl amine) (PTAA) as HTL on large-area substrates. To prevent void formation at the HTL interface of gas stream-assisted blade coated perovskite layers, the effect of blending small amounts of lead chloride (PbCl2) in the perovskite precursor so...Continue Reading

References

Apr 16, 2009·Journal of the American Chemical Society·Akihiro KojimaTsutomu Miyasaka
Aug 22, 2014·Nature Materials·Michael Grätzel
Jan 13, 2015·Advanced Materials·Kyeongil HwangDoojin Vak
Nov 3, 2015·ACS Applied Materials & Interfaces·Fabio MatteocciAldo Di Carlo
Jun 2, 2018·ACS Applied Materials & Interfaces·Shanshan ZhangDieter Neher
Nov 10, 2018·ACS Applied Materials & Interfaces·James E BishopDavid G Lidzey
Mar 13, 2019·ACS Applied Materials & Interfaces·Moritz SchultesMichael Powalla
Apr 2, 2019·Advanced Materials·Ian A HowardUlrich W Paetzold
Apr 22, 2020·Scientific Reports·James E BishopDavid G Lidzey

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