In Situ Optical Spectroscopy Demonstrates the Effect of Solvent Additive in the Formation of All-Polymer Solar Cells
Artikel i vetenskaplig tidskrift, 2022

1-Chloronaphthalene (CN) has been a common solvent additive in both fullerene- A nd nonfullerene-based organic solar cells. In spite of this, its working mechanism is seldom investigated, in particular, during the drying process of bulk heterojunctions composed of a donor:acceptor mixture. In this work, the role of CN in all-polymer solar cells is investigated by in situ spectroscopies and ex situ characterization of blade-coated PBDB-T:PF5-Y5 blends. Our results suggest that the added CN promotes self-aggregation of polymer donor PBDB-T during the drying process of the blend film, resulting in enhanced crystallinity and hole mobility, which contribute to the increased fill factor and improved performance of PBDB-T:PF5-Y5 solar cells. Besides, the nonradiative energy loss of the corresponding device is also reduced by the addition of CN, corresponding to a slightly increased open-circuit voltage. Overall, our observations deepen our understanding of the drying dynamics, which may guide further development of all-polymer solar cells.

Författare

Yanfeng Liu

Linköpings universitet

Jiaxing University

Qunping Fan

Xi'an Jiaotong University

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Heng Liu

Chinese University of Hong Kong

Ishita Jalan

Karlstads universitet

Yingzhi Jin

Jiaxing University

Jan van Stam

Karlstads universitet

Ellen Moons

Karlstads universitet

Ergang Wang

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Xinhui Lu

Chinese University of Hong Kong

O.W. Inganäs

Linköpings universitet

Fengling Zhang

Linköpings universitet

Journal of Physical Chemistry Letters

1948-7185 (eISSN)

Vol. 13 11696-11702

Ämneskategorier

Polymerkemi

Fysikalisk kemi

Polymerteknologi

Atom- och molekylfysik och optik

Textil-, gummi- och polymermaterial

DOI

10.1021/acs.jpclett.2c03397

PubMed

36512444

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Senast uppdaterat

2024-07-17