Document Type

Journal Article

Department/Unit

Department of Physics

Language

English

Abstract

In this work, we report the effort to develop high efficiency inverted polymer solar cells (PSCs) by applying a solution processable bilayer ZnO/carbon quantum dots (C-QDs) electron extraction layer (EEL). It is shownthat the use of the bilayerEEL helps to suppress the exciton quenching by passivating the ZnO surface defects in the EEL, leading to an enhanced exciton dissociation, reduced charge recombinationand more efficient charge extraction probability, and thereby achieving high power conversion efficiency (PCE). The inverted PSCs, based on the blend of poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} and [6,6]-phenyl C71-butyric acid methyl ester, possess a significant improvement in PCE of ~9.64%, which is >27% higher than that of a control cell (~7.59%). The use of a bilayer ZnO/C-QDs EEL offers a promising approach for attaining high efficiency inverted PSCs.

Keywords

EEL, polymer solar cells, bilayer, ZnO, C-QDs

Publication Date

2-2018

Source Publication Title

ACS Applied Materials and Interfaces

Volume

10

Issue

5

Start Page

4895

End Page

4903

Publisher

American Chemical Society

Peer Reviewed

1

Copyright

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher.
To access the final edited and published work see http://dx.doi.org/10.1021/acsami.7b17969.

Funder

This study was supported by National Natural Science Foundation of China (NSFC) (Grant No.s 61704118, 51602212, 61605137), Shanxi Provincial Natural Science Foundation of China (Grant No. 201601D021050). This study was also supported by the Qualified Personal Foundation of Taiyuan University of Technology (800101-02030017). F.R. Zhu acknowledges the support by the Research Grants Council of Hong Kong Special Administrative Region, China, General Research Fund (12303114, 12302817), Hong Kong Baptist University Inter-Institutional Collaborative Research Scheme (RC-ICRS/15-16/04) and Shenzhen Peacock Plan (KQTD20140630110339343).

DOI

10.1021/acsami.7b17969

Link to Publisher's Edition

http://dx.doi.org/10.1021/acsami.7b17969

ISSN (print)

19448244

ISSN (electronic)

19448252

JA-5052-29475_suppl.pdf (2805 kB)
Supporting Information

Available for download on Friday, March 01, 2019

Additional Files

JA-5052-29475_suppl.pdf (2805 kB)
Supporting Information

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