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Title: Two step sintering process and metal grid design optimization for highly efficient ITO free organic photovoltaics
Authors: Neophytou, Marios 
Georgiou, Efthymios 
Fyrillas, Marios M. 
Choulis, Stelios A. 
Keywords: Inkjet printing
ITO-Free electrodes
Metal grids
Printed electronics
Silver nanoparticles
Transparent electrodes
Issue Date: 1-Mar-2014
Publisher: Elsevier
Source: Solar Energy Materials and Solar Cells, 2014, Volume 122, Pages 1-7
Abstract: The need for inexpensive alternative to indium doped tin oxide (ITO) transparent electrodes is imminent for cost-efficient solution processed optoelectronic applications. ITO-free transparent electrodes can be based on inkjet-printed Silver (Ag) nanoparticles grids embedded into PEDOT:PSS buffer layers. We present an in-depth investigation of the morphological evolution of the inkjet printed Ag nanopartricle sintering process combined with an ultimate control of the printed grid design requirements for efficient ITO-free organic photovoltaics (OPVs). We report on glass/ITO-free P3HT:PC60BM and Si-PCPDTBT:PC70BM based OPVs with power conversion efficiency of 2.8% and 4.9% respectively. These devices exhibited minimal losses when compared to reference ITO-based OPVs.
ISSN: 09270248
Rights: © 2013 Elsevier B.V.
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