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Efficient and Versatile Interconnection Layer by Solvent Treatment of PEDOT:PSS Interlayer for Air‐Processed Organic Tandem Solar Cells
Author(s) -
Prosa Mario,
Tessarolo Marta,
Bolognesi Margherita,
Cramer Tobias,
Chen Zhihua,
Facchetti Antonio,
Fraboni Beatrice,
Seri Mirko,
Ruani Giampiero,
Muccini Michele
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600770
Subject(s) - pedot:pss , materials science , tandem , layer (electronics) , active layer , ohmic contact , organic solar cell , optoelectronics , conductive polymer , interconnection , nanotechnology , polymer , chemical engineering , composite material , computer science , computer network , engineering , thin film transistor
A robust and efficient interconnection layer (ICL) based on low conductive poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) and ZnO nanoparticles is implemented in a solution‐air‐processed, blade coated inverted polymer tandem solar cell. The commercial PEDOT:PSS (Heraeus Clevios P VP Al 4083) is modified with a fluorosurfactant to allow its deposition onto any hydrophobic active layer surface. However, this method alters the electrical and energetic properties of the PEDOT:PSS thus affecting the interface with the ZnO layer, responsible for an inefficient ICL and poorly performing tandem devices. The ohmic contact at the PEDOT:PSS/ZnO interface is successfully optimized through a simple solvent treatment of the PEDOT:PSS film surface, leading to tandem devices with power conversion efficiencies (PCEs) improved by more than 50% compared to the untreated reference system. The reported method is an easy and versatile approach to optimize the functionality of the PEDOT:PSS/ZnO ICL of inverted multijunction devices, applicable onto any organic active layer and compatible with a roll‐to‐roll production line.