DataVXChemistry of MaterialsPaper
journal article·2018-04-10Open access

Designing Small Molecules as Ternary Energy-Cascade Additives for Polymer:Fullerene Solar Cell Blends

Angela Punzi, Alessandra Operamolla, Omar Hassan Omar, Francesca Brunetti, Alberto D. Scaccabarozzi, Gianluca M. Farinola, Natalie Stingelin

Chemistry of Materials· Volume 30· Issue 7
Publisher pageOpen full text
Source abstract

Abstract

Ternary blends comprising an ‘energy-cascade former’ in addition to the donor and the acceptor materials increasingly attract attention in the organic solar cell area as they seem to provide a tool to positively manipulate the open-circuit voltage of bulk-heterojunction devices. By comparing two additives that have similar HOMO/LUMO levels and that can be expected to lead to an energy cascade in ternaries with the prototypical P3HT:PC60BM system, we demonstrate here that the compatibility of the additive with, in this specific case, the fullerene, that can be tailored by peripheral chemical functionalization, plays a critical role in energy cascade formation. A compromise needs to be found between good mixing (favoring energy cascade formation) and phase separation (supporting charge extraction) that affect the open-circuit voltage in an as important fashion as their electronic features, providing critical insights for future materials design activities.
Source: openalex_inverted_index · Quality: baseline

Research context

Polymers

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Fullerene Chemistry and Applications

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

Affiliations

Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4, I-70126 Bari, Italy

CNR-ICCOM Istituto di Chimica dei Composti Organometallici, Via Orabona 4, I-70126 Bari, Italy

Centre for Hybrid and Organic Solar Energy (CHOSE), Dipartimento di Ingegneria Elettronica, Università degli Studi di Roma “Tor Vergata”, via del Politecnico 1, 00133 Roma, Italy

Department of Materials and Centre of Plastic Electronics, Imperial College London, London SW7 2AZ, U.K.

School of Materials Science and Engineering and School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, United States

Laboratoire de Chimie des Polymeres Organiques − LCPO, UMR5629 Université de Bordeaux, Allee Geoffroy Saint Hilaire, Batiment BB CS50023, 33615 Pessac Cedex, France

Funding

Horizon 2020 Framework Programme · Regione Puglia

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