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Solution‐Processed Tin Oxide‐PEDOT:PSS Interconnecting Layers for Efficient Inverted and Conventional Tandem Polymer Solar Cells
Author(s) -
Di Carlo Rasi Dario,
van Thiel Pieter M. J. G.,
Bin Haijun,
Hendriks Koen H.,
Heintges Gaël H. L.,
Wienk Martijn M.,
Becker Tim,
Li Yongfang,
Riedl Thomas,
Janssen René A. J.
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800366
Subject(s) - tandem , polystyrene sulfonate , pedot:pss , materials science , tin oxide , tin , indium tin oxide , oxide , polymer , polystyrene , layer (electronics) , nanotechnology , optoelectronics , chemical engineering , composite material , engineering , metallurgy
Tin oxide nanoparticles are employed as an electron transporting layer in solution‐processed polymer solar cells. Tin oxide based devices yield excellent performance and can interchangeably be used in conventional and inverted device configurations. In combination with poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) as a hole transporting layer, tin oxide forms an effective interconnecting layer (ICL) for tandem solar cells. Conventional and inverted tandem cells with this ICL provide efficiencies up to 10.4% in good agreement with optical‐electrical modeling simulations. The critical advantage of tin oxide in an ICL in a conventional tandem structure over the commonly used zinc oxide is that the latter requires the use of a pH‐neutral formulation of PEDOT:PSS to fabricate the ICL, limiting the open‐circuit voltage ( V OC ) because of its low work function. The SnO 2 /PEDOT:PSS ICL, on the other hand, provides a nearly loss‐free V OC .