Enhanced exciton harvesting in a planar heterojunction organic photovoltaic device by solvent vapor annealing

Zhang, Y., Sajjad, M. T., Blaszczyk, O., Ruseckas, A., Serrano, L. A., Cooke, G. and Samuel, I. D.W. (2019) Enhanced exciton harvesting in a planar heterojunction organic photovoltaic device by solvent vapor annealing. Organic Electronics, 70, pp. 162-166. (doi: 10.1016/j.orgel.2019.03.014)

Abstract

The singlet exciton diffusion length was measured in a small molecule electron donor material DR3TBDTT using fluorescence quenching at a planar interface with a cross-linked fullerene derivative. The one-dimensional exciton diffusion length was increased from ~16 to ~24 nm by annealing the film in carbon disulfide solvent vapor. Planar heterojunction solar cells were fabricated using bilayers of these materials and it was found that solvent vapor annealing increased the short circuit current density by 46%. This can be explained by improved exciton harvesting in the annealed bilayer.

• Item Type: Articles
• Additional Information: We thank the European Research Council (ERC) for financial support (EXCITON grant 321305).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cooke, Professor Graeme
• Authors: Zhang, Y., Sajjad, M. T., Blaszczyk, O., Ruseckas, A., Serrano, L. A., Cooke, G., and Samuel, I. D.W.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Organic Electronics
• Publisher: Elsevier
• ISSN: 1566-1199
• ISSN (Online): 1878-5530
• Published Online: 13 March 2019
• Copyright Holders: Copyright © 2019 Elsevier B.V.
• First Published: First published in Organic Electronics 70:162-166
• Publisher Policy: Reproduced in accordance with the publisher copyright policy