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Title: Synergistic effects of buffer layer processing additives for enhanced hole carrier selectivity in inverted Organic Photovoltaics
Authors: Savva, Achilleas 
Neophytou, Marios 
Koutsides, Charalambos 
Kalli, Kyriacos 
Choulis, Stelios A. 
Keywords: Interfaces
Inverted organic solar cells
PEDOT:PSS buffer layers
Printed electronics
Processing additives
Solution based electronic materials
Issue Date: 19-Aug-2013
Publisher: Elsevier
Source: Organic Electronics: physics, materials, applications, 2013, Volume 14, Issue 11, Pages 3123-3130
Abstract: Solution based inverted Organic Photovoltaic (OPVs) usually use Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) derivatives combined with pristine processing additives as hole selective contact on top of the hydrophobic conjugated polymer:fullerene active layer. In this study, PEDOT:PSS based hole selective contact is treated with two different boiling point additives, 2,5,8,11-tetramethyl-6-dodecyn-5,8-diol ethoxylate (Dynol) and Zonyl FS-300 fluorosurfactant (Zonyl). Although corresponding inverted OPVs using the above PEDOT:PSS:Additives show similar power conversion efficiency (PCE) values, the mechanisms of their implementation on inverted OPV operation are not identical. By understanding the synergistic effects of PEDOT:PSS processing additives on the hole selectivity of inverted OPVs we demonstrate a novel combination of PEDOT:PSS additives mixture as an effective route to further increase the hole selectivity, reliability andpower conversion efficiency of inverted OPVs.
ISSN: 15661199
Rights: © 2013 Elsevier B.V. All rights reserved.
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