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|Title:||Improving the layer morphology of solution-processed perylene diimide organic solar cells with the use of a polymeric interlayer||Authors:||Singh, Ranbir
Mróz, Marta M.
Fonzo, Fabio Di
Keivanidis, Panagiotis E.
|Major Field of Science:||Engineering and Technology||Field Category:||Electrical Engineering - Electronic Engineering - Information Engineering||Keywords:||power conversion efficiency (PCE);organic photovoltaic (OPV)||Issue Date:||7-Oct-2013||Source:||Organic Photonics and Photovoltaics, 2013, vol. 1, no. 1, pp. 24-38||Volume:||1||Issue:||1||Start page:||24||End page:||38||Journal:||Organic Photonics and Photovoltaics||Abstract:||Herein we demonstrate a method to improve the power conversion efficiency (PCE) parameter of organic photovoltaic (OPV) devices based on the electron acceptor N,N’-bis(1- ethylpropyl)-perylene-3,4,9,10-tetracarboxylic diimide (PDI) blended with the electron donor poly(indenofluorene)-aryloctyl (PIF-Aryl). The device parameters of the short-circuit current, open-circuit voltage and fill factor are found increased after the insertion of a thin poly [9, 9-dioctylfluorene-co-N- [4-(3-methylpropyl)]-diphenylamine] (TFB) photoactive interlayer between the hole-collecting electrode and the photoactive layer of the device. Unlike to most of the cases where interlayers serve as charge extractors, in our system the polymeric interlayer serves as a morphology modifying agent that drives the PDI component to segregate better at the interface with the device cathode; that is at the carrier-collecting electrode interface, which is not in physical contact with the interlayer. The processes of energy/charge transfer of the TFB excitons to/with the PIF-Aryl:PDI top-layer are also addressed. Charge transfer reactions dominate at the TFB/PIF-Aryl:PDI interface but no significant contribution in the photocurrent generation is seen in the photoaction spectra of the bilayer device.||ISSN:||2299-3177||DOI:||10.2478/oph-2013-0003||Rights:||© Versita||Type:||Article||Affiliation :||Fondazione Istituto Italiano di Tecnologia
Instituto Madrileno de Estudios Avanzados en Nanociencia
University of Bologna
Max Planck Institute for Polymer Research
Indian Institute of Technology Delhi
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