Issue 19, 2021

A recent overview of porphyrin-based π-extended small molecules as donors and acceptors for high-performance organic solar cells

Abstract

Organic solar cells (OSCs) have been considered as a promising, cost-effective alternative to the silicon-based solar cells due to their light weight, mechanical flexibility, and easy fabrication features. Over the past decades, organic semiconducting materials have been developed rapidly for use in bulk heterojunction (BHJ) OSCs. Among them, porphyrin-based small molecules have been widely applied as electron donors and electron acceptors in BHJ OSCs due to their large conjugated planar structures and strong UV-visible and near-infrared absorption. In this short review article, we mainly focus on summarizing the recent progress of the rational design of push–pull porphyrin-based small molecules for BHJ OSC applications. After various structural developments, the power conversion efficiencies (PCEs) of porphyrin-based small molecules as electron donors in OSCs have exceeded 12%. Apart from that, a PCE of 9.6% has been recorded for a device based on a porphyrin electron acceptor. This paper will provide a good insight into the structure–performance correlation and molecular engineering strategies of porphyrin-based small molecules in a stepwise manner.

Graphical abstract: A recent overview of porphyrin-based π-extended small molecules as donors and acceptors for high-performance organic solar cells

Article information

Article type
Review Article
Submitted
29 jun 2021
Accepted
16 aug 2021
First published
17 aug 2021

Mater. Chem. Front., 2021,5, 7119-7133

A recent overview of porphyrin-based π-extended small molecules as donors and acceptors for high-performance organic solar cells

V. Piradi, F. Yan, X. Zhu and W. Wong, Mater. Chem. Front., 2021, 5, 7119 DOI: 10.1039/D1QM00952D

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