Issue 5, 2017

Molecular electron acceptors for efficient fullerene-free organic solar cells

Abstract

Nowadays, organic solar cells (OSCs) with efficiencies over 10% have been achieved through the elaborate design of electron donors and fullerene acceptors. However, the drawbacks of fullerene acceptors, like poor absorption, limited chemical and energetic tunabilities, high-cost purification and morphological instability, have become the bottlenecks for the further improvement of OSCs. To overcome the mentioned shortages from fullerene, research studies on non-fullerene electron acceptors have boomed. To date, the highest efficiency of fullerene-free OSCs has been pushed to be 12%, which surpasses that of fullerene-based OSCs. In this perspective, we focus on summarizing the development of small molecule electron acceptors designed to replace the fullerene derivatives. Since it has been revealed that the search for matched donor:acceptor pairs is important for accomplishing high efficiencies, we therefore divide electron acceptors into several categories according to the donors used in fullerene-free OSCs. After the introduction of these acceptors, we outline the designing rules as well as perspectives for the development of non-fullerene acceptors. We believe that the development of non-fullerene electron acceptors will make organic photovoltaics closer to practical applications.

Graphical abstract: Molecular electron acceptors for efficient fullerene-free organic solar cells

Article information

Article type
Perspective
Submitted
01 صفر 1438
Accepted
20 ربيع الأول 1438
First published
21 ربيع الأول 1438

Phys. Chem. Chem. Phys., 2017,19, 3440-3458

Molecular electron acceptors for efficient fullerene-free organic solar cells

S. Li, Z. Zhang, M. Shi, C. Li and H. Chen, Phys. Chem. Chem. Phys., 2017, 19, 3440 DOI: 10.1039/C6CP07465K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements