Issue 17, 2022

On the interface reactions and stability of nonfullerene organic solar cells

Abstract

Long-term stability is critical for organic solar cells (OSCs) for practical applications. Several factors affect the stability of OSCs, including materials stability, morphology stability of bulk-heterojunctions and interface stability. In this perspective, we focus on interface stability due to interfacial reactions between the emerging acceptor–donor–acceptor (A–D–A) type nonfullerene active layers and interfacial layers. The description covers the initial phenomena of interfacial instability, mechanism of interfacial reactions, and strategies adopted to suppress interfacial reactions between the nonfullerene active layers and interfacial layers. Methods to test and analyze the chemical instability of nonfullerene acceptors are also included. The C[double bond, length as m-dash]C vinyl linker between the donor moiety and acceptor moiety is chemically or photochemically reactive and is a weak point for interface stability. The interface stability of OSCs could be enhanced by reducing the reactivity of the C[double bond, length as m-dash]C vinyl linker or removing it directly, modifying the surface of interfacial layers, and developing other novel interfacial materials.

Graphical abstract: On the interface reactions and stability of nonfullerene organic solar cells

Article information

Article type
Perspective
Submitted
31 12 2021
Accepted
14 3 2022
First published
22 3 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 4714-4739

On the interface reactions and stability of nonfullerene organic solar cells

P. Jiang, L. Hu, L. Sun, Z. Li, H. Han and Y. Zhou, Chem. Sci., 2022, 13, 4714 DOI: 10.1039/D1SC07269B

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