Journal article Open Access

Efficient flexible organic photovoltaics using silver nanowires and polymer based transparent electrodes

Park, Yoonseok; Bormann, Ludwig; Müller-Meskamp, Lars; Vandewal, Koen; Leo, Karl

Planarization and filling voids between wires are key issues when using nanowire electrodes in flexible solar cells such as organic photovoltaics (OPV). For this purpose, we use poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT: PSS) which leads to an electrically well con- nected silver nanowire (AgNW) network. Furthermore, the use of water based PEDOT: PSS leads to humidity assisted AgNW fusing, resulting in a maximum processing temperature of only 120 ?C. OPV cells using this AgNW/PEDOT: PSS transparent electrodes exhibit power conversion efficiencies up to 7.15%. Moreover, OPV devices on PET substrates with an alumina encapsulation and barrier adhesive show excellent mechanical flexibility.

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