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Incorporation of a Metal Oxide Interlayer using a Virus‐Templated Assembly for Synthesis of Graphene‐Electrode‐Based Organic Photovoltaics
Author(s) -
Lee Yong Man,
Kim Wanjung,
Kim Young Hun,
Kim Jung Kyu,
Jang Jiryang,
Choe WooSeok,
Park Jong Hyeok,
Yoo Pil J.
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201403487
Subject(s) - graphene , materials science , pedot:pss , electrode , oxide , thin film , nanotechnology , organic solar cell , layer (electronics) , polymer , composite material , chemistry , metallurgy
Transition metal oxide (TMO) thin films have been exploited as interlayers for charge extraction between electrodes and active layers in organic photovoltaic (OPV) devices. Additionally, graphene‐electrode‐based OPVs have received considerable attention as a means to enhance device stability. However, the film deposition process of a TMO thin‐film layer onto the graphene electrode is highly restricted owing to the hydrophobic nature of the graphene surface; thus, the preparation of the device should rely on a vacuum process that is incompatible with solution processing. In this study, we present a novel means for creating a thin tungsten oxide (WO 3 ) interlayer on a graphene electrode by employing an engineered biotemplate of M13 viruses, whereby nondestructive functionalization of the graphene and uniform synthesis of a WO 3 thin interlayer are concurrently achieved. As a result, the incorporated virus‐templated WO 3 interlayer exhibited solar‐conversion efficiency that was 20 % higher than that of conventional OPVs based on the use of a (3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) interlayer. Notably, bilayer‐structured OPVs with synergistically integrated WO 3 /PEDOT:PSS achieved >60 % enhancement in device performance.