DataVXACS Applied Materials & InterfacesPaper
journal article·2018-06-20

Engineering of Porphyrin Molecules for Use as Effective Cathode Interfacial Modifiers in Organic Solar Cells of Enhanced Efficiency and Stability

Marinos Tountas, Apostolis Verykios, Ermioni Polydorou, Andreas Kaltzoglou, Anastasia Soultati, Nikolaos Balis, Panagiotis A. Angaridis, Michael Papadakis, Vasilis Nikolaou, Florian Auras, Leonidas C. Palilis, Dimitris Tsikritzis, Evangelos K. Evangelou, Spyros Gardelis, Matroni Koutsoureli, George Papaioannou, Ioannis D. Petsalakis, Stella Kennou, Dimitris Davazoglou, Panagiotis Argitis, Polycarpos Falaras, Athanassios G. Coutsolelos, Maria Vasilopoulou

ACS Applied Materials & Interfaces· Volume 10· Issue 24
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Source abstract

Abstract

In the present work, we effectively modify the TiO2 electron transport layer of organic solar cells with an inverted architecture using appropriately engineered porphyrin molecules. The results show that the optimized porphyrin modifier bearing two carboxylic acids as the anchoring groups and a triazine electron-withdrawing spacer significantly reduces the work function of TiO2, thereby reducing the electron extraction barrier. Moreover, the lower surface energy of the porphyrin-modified substrate results in better physical compatibility between the latter and the photoactive blend. Upon employing porphyrin-modified TiO2 electron transport layers in PTB7:PC71BM-based organic solar cells we obtained an improved average power conversion efficiency up to 8.73%. Importantly, porphyrin modification significantly increased the lifetime of the devices, which retained 80% of their initial efficiency after 500 h of storage in the dark. Because of its simplicity and efficacy, this approach should give tantalizing glimpses and generate an impact into the potential of porphyrins to facilitate electron transfer in organic solar cells and related devices.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Organic Electronics and Photovoltaics · TiO2 Photocatalysis and Solar Cells · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, Agia Paraskevi, 15310 Athens, Greece

School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece

Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Department of Chemistry, Laboratory of Bioinorganic Chemistry, University of Crete, Voutes Campus, Heraklion 70013, Crete, Greece

Cavendish Laboratory, University of Cambridge, CB3 0HE Cambridge, United Kingdom

Department of Physics, University of Ioannina, 45110 Ioannina, Greece

Solid State Physics Section, Physics Department, National and Kapodistrian University of Athens, Panepistimioupolis, 15784 Zografos, Athens, Greece

Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Vas. Constantinou Avenue 48, 11635 Athens, Greece

Funding

State Scholarships Foundation · FP7 Research Potential of Convergence Regions · General Secretariat for Research and Technology · European Social Fund

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