Document Type

Journal Article

Department/Unit

Department of Physics

Language

English

Abstract

Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) hole contact is widely used in organic solar cells (OSCs). In this work, we report the effort to develop a versatile solution-processed molybdenum trioxide (s-MoO3)/Au nanoparticles (NPs)/s-MoO3 (MAM) hole contact for application in PEDOT:PSS-free OSCs. The use of Au NPs is to improve the adhesion between the two s-MoO3 layers in the MAM hole contact. It shows that MAM hole contact enables to enhance the charge extraction through suppression of bimolecular recombination, and reduce the leakage current by improvement of contact property. Power conversion efficiency of 7.68% was obtained for MAM-based OSCs, with a blend system of poly[[4,8-bis[(2-ethylhexyl) oxy]benzo[1,2-b: 4,5-b’] dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno[3,4-b]-thiophenediyl]]: [6,6]- phenyl-C70-butyric-acid-methyl-ester, which is comparable to that of the PEDOT:PSS-based cells (7.48%). It demonstrates clearly that solution-processed MAM hole contact can be readily adopted to replace the widely used acidic PEDOT:PSS hole contact for application in PEDOT:PSS-free OSCs.

Keywords

Solution-processed oxide, Hole contact, PEDOT:PSS-free, Charge collection efficiency, Absorption enhancement, Organic solar cells

Publication Date

1-2018

Source Publication Title

Organic Electronics

Volume

52

Start Page

1

End Page

6

Publisher

Elsevier

Peer Reviewed

1

Copyright

© 2017 Elsevier B.V. All rights reserved.

Funder

This work was financially supported by the Research Grants Council of Hong Kong Special Administrative Region, China, General Research Fund (GRF/12303114, 12302817), Inter-institutional Collaborative Research Scheme (RC-ICRS/15-16/04) and Shenzhen Peacock Plan (KQTD20140630110339343).

DOI

10.1016/j.orgel.2017.10.005

Link to Publisher's Edition

http://dx.doi.org/10.1016/j.orgel.2017.10.005

ISSN (print)

15661199

ISSN (electronic)

18785530

Available for download on Saturday, February 01, 2020

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