Issue 4, 2023

Reducing non-radiative voltage losses in organic solar cells using molecular encapsulation

Abstract

Non-radiative voltage loss is one of the significant bottlenecks limiting the performance of organic solar cells (OSCs). This work presents a material design approach for conjugated polymers isolating the polymer chains with molecular encapsulation, enabling better control over the donor–acceptor spacing. Bulk-heterojunction OSCs based on encapsulated polymers as electron donors show a remarkable increase of ∼50 mV in the Voc. Significant improvement in the Voc is attributed to reduced non-radiative voltage losses as evidenced by enhanced electroluminescence as a result of suppressed intermolecular aggregation and an increase in structural disorder. Importantly, molecular encapsulation resulted in notable improvement in the operational stability of OSCs with no burn-in loss in Voc, presenting a promising strategy to simultaneously enhance the performance and operational stability of OSCs.

Graphical abstract: Reducing non-radiative voltage losses in organic solar cells using molecular encapsulation

Supplementary files

Article information

Article type
Research Article
Submitted
11 Oct 2022
Accepted
14 Dec 2022
First published
03 Jan 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Chem. Front., 2023,7, 735-744

Reducing non-radiative voltage losses in organic solar cells using molecular encapsulation

A. Sharma, L. Sharma, J. Bertrandie, D. R. Villalva, Y. Gao, C. S. P. De Castro, J. Troughton, J. Gorenflot, F. Laquai, H. Bronstein and D. Baran, Mater. Chem. Front., 2023, 7, 735 DOI: 10.1039/D2QM01044E

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