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Plasmonic bulk heterojunction solar cells: the role of nanoparticle ligand coating

Plasmonic bulk heterojunction solar cells: the role of nanoparticle ligand coating
Plasmonic bulk heterojunction solar cells: the role of nanoparticle ligand coating
There has been a lot of interest regarding the influence of active-layer-incorporated plasmonic nanoparticles (NPs) in the performance of bulk heterojunction organic photovoltaic (OPV) devices, while both an increase and decrease in performance have been reported. In this paper, following a systematic approach, we demonstrate strong evidence of the critical importance of the NPs’ ligand shell on the device performance. In particular, it is argued that the plasmonic effect accountable for the performance enhancement takes place only in the case in which the NP’s core is in direct contact with the active layer polymer donor. This can be achieved with the utilization of either ligand-free NPs or NPs terminated with the same polymer donor as the active layer. Using this concept we achieved an enhanced efficiency of 7.16% in OPV devices incorporating the poly(3-hexylthiophene-2,5-diyl) (P3HT):indene-C60 bisadduct (ICBA) active layer. On the contrary, devices with ligand-terminated Au NPs show lower performance, even compared with the reference, NP-free, device due to the deteriorated active layer morphology attained, which leads to exciton quenching. These new insights into the plasmonic light-harvesting technology could shed light on the existing controversy and provide guidelines for device design and fabrication.
organic solar cells, bulk heterojunction, plasmonic nanoparticles, ligand coating
1-10
Kymakis, Emmanuel
8f3dfa7d-dfe6-40ee-9fca-ae1f0ab6f444
Spyropoulos, George D.
e398d383-9c65-4054-9a18-675b7a790fd6
Fernandes, Rute
848317d8-1eb0-48ad-aefc-012ab19d9f52
Kakavelakis, George
c5401e3b-a028-4ea7-a87b-de6f83d92e51
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Stratakis, Emmanuel
73e27da3-b109-4404-94ef-12b8f1ab2d16
Kymakis, Emmanuel
8f3dfa7d-dfe6-40ee-9fca-ae1f0ab6f444
Spyropoulos, George D.
e398d383-9c65-4054-9a18-675b7a790fd6
Fernandes, Rute
848317d8-1eb0-48ad-aefc-012ab19d9f52
Kakavelakis, George
c5401e3b-a028-4ea7-a87b-de6f83d92e51
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Stratakis, Emmanuel
73e27da3-b109-4404-94ef-12b8f1ab2d16

Kymakis, Emmanuel, Spyropoulos, George D., Fernandes, Rute, Kakavelakis, George, Kanaras, Antonios G. and Stratakis, Emmanuel (2015) Plasmonic bulk heterojunction solar cells: the role of nanoparticle ligand coating. ACS Photonics, 1-10. (doi:10.1021/acsphotonics.5b00202).

Record type: Article

Abstract

There has been a lot of interest regarding the influence of active-layer-incorporated plasmonic nanoparticles (NPs) in the performance of bulk heterojunction organic photovoltaic (OPV) devices, while both an increase and decrease in performance have been reported. In this paper, following a systematic approach, we demonstrate strong evidence of the critical importance of the NPs’ ligand shell on the device performance. In particular, it is argued that the plasmonic effect accountable for the performance enhancement takes place only in the case in which the NP’s core is in direct contact with the active layer polymer donor. This can be achieved with the utilization of either ligand-free NPs or NPs terminated with the same polymer donor as the active layer. Using this concept we achieved an enhanced efficiency of 7.16% in OPV devices incorporating the poly(3-hexylthiophene-2,5-diyl) (P3HT):indene-C60 bisadduct (ICBA) active layer. On the contrary, devices with ligand-terminated Au NPs show lower performance, even compared with the reference, NP-free, device due to the deteriorated active layer morphology attained, which leads to exciton quenching. These new insights into the plasmonic light-harvesting technology could shed light on the existing controversy and provide guidelines for device design and fabrication.

Full text not available from this repository.

More information

Accepted/In Press date: 6 May 2015
Published date: 6 May 2015
Keywords: organic solar cells, bulk heterojunction, plasmonic nanoparticles, ligand coating
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 377405
URI: https://eprints.soton.ac.uk/id/eprint/377405
PURE UUID: 1eaaa59b-de58-494b-8848-dfcd629747b6
ORCID for Antonios G. Kanaras: ORCID iD orcid.org/0000-0002-9847-6706

Catalogue record

Date deposited: 11 Jun 2015 14:16
Last modified: 20 Jul 2019 00:51

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