Solution modification of PEDOT:PSS inks for ultrasonic spray coating

Abstract

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Progress in Spray Coated Perovskite Films for Solar Cell Applications

“…To date, the use of ultrasonic spray coating for fabricating solar cells and modules has not been limited to just the perovskite active layers. [5g,7b,13f,16] It has also been equally valuable in fabricating HTLs [17] and ETLs. [5f,18] Finally, recent advances have also featured fully spray-cast PSCs, i.e., all key components including the HTL/perovskite layer/ETL were fabricated by spray coating.…”

Development of Spray-Coated Perovskite Solar Cells

“…Spray-coating is a technique that we have investigated extensively to fabricate both organic − and perovskite ,− photovoltaic devices. In comparison with other scalable techniques, spray deposition has two advantages.…”

Advances in Spray-Cast Perovskite Solar Cells

“…11 Such additives have also been used to suppress dewetting of PEDOT:PSS films, and thus, this approach could be applied more generally when formulating semiconductor inks for spraycoating applications. 43 Note, however, that it will be important to explore the extent to which such materials can be used (even within the perovskite active layer) to improve processing and film morphology without compromising electronic functionality.…”

“…This effect appeared to be promoted by the addition of dopant molecules to the spiro-OMeTAD to improve its conductivity; however, it was found that dewetting could be largely suppressed by the use of viscosity modifiers . Such additives have also been used to suppress dewetting of PEDOT:PSS films, and thus, this approach could be applied more generally when formulating semiconductor inks for spray-coating applications . Note, however, that it will be important to explore the extent to which such materials can be used (even within the perovskite active layer) to improve processing and film morphology without compromising electronic functionality.…”