Towards a full understanding of regioisomer effects of indene-C60 bisadduct acceptors in bulk heterojunction polymer solar cells

Cao T, Chen N, Liu G, Wan Y, Perea JD, Xia Y, Wang Z, Song B, Li N, Li X, Zhou Y, Brabec C, Li Y (2017)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Book Volume: 5

Pages Range: 10206-10219

Journal Issue: 21

DOI: 10.1039/c7ta01665d

Abstract

Indene-C60 bisadduct (IC60BA), which can offer a significantly higher open-circuit voltage (Voc) than monoadducts, has become the research focus as electron acceptor materials in polymer solar cells (PSCs) in recent years. However, despite its popularity, IC60BA have always been applied in PSCs as mixture of several regioisomers and the nature of this mixture has never been fully investigated and understood. Herein, for the first time, 12 major regioisomers of IC60BA were isolated and a full investigation was carried out with respect to their structure, abundance, solubility and their corresponding photovoltaic performance. The results show that the PSCs based on these regioisomeric structures present very diverse PCE and their photovoltaic performance was dramatically affected not only by the relative indene positions but also by the steric orientation of the two indene groups. Electrochemical studies further revealed that the effect of energetic disorder inside the IC60BA regioisomers on their photovoltaic performance is insignificant when applied in PSCs. However, the steric structures and solubility of the regioisomers were found to have significant impact on the morphology and bulk properties of the active layer of PSCs, which give rise to very different PCE of devices based on IC60BA regioisomers with different structures. © 2017 The Royal Society of Chemistry.

Authors with CRIS profile

Jose Dario Perea Ospina Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Soochow University, Suzhou / 苏州大学 CN China (CN)

How to cite

APA:

Cao, T., Chen, N., Liu, G., Wan, Y., Perea, J.D., Xia, Y.,... Li, Y. (2017). Towards a full understanding of regioisomer effects of indene-C60 bisadduct acceptors in bulk heterojunction polymer solar cells. Journal of Materials Chemistry A, 5(21), 10206-10219. https://doi.org/10.1039/c7ta01665d

MLA:

Cao, Tiantian, et al. "Towards a full understanding of regioisomer effects of indene-C60 bisadduct acceptors in bulk heterojunction polymer solar cells." Journal of Materials Chemistry A 5.21 (2017): 10206-10219.

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