Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics

Muhammad T. Sajjad; Arvydas Ruseckas; Lethy Krishnan Jagadamma; Yiwei Zhang; Ifor D. W. Samuel

doi:10.1039/D0TA06017H

Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics

Muhammad T. Sajjad, Arvydas Ruseckas, Lethy Krishnan Jagadamma, Yiwei Zhang, Ifor D. W. Samuel

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

14 Downloads (Pure)

Abstract

We investigated singlet exciton diffusion in three ITIC derivatives used as electron acceptors in organic photovoltaics (OPVs) by time-resolved photoluminescence volume quenching and exciton–exciton annihilation. The exciton diffusion coefficient was found to be in the range of 0.003–0.007 cm² s⁻¹ which leads to a three-dimensional exciton diffusion length of up to 31 nm. We fabricated solar cells using bulk heterojunctions of these acceptors with the electron donor PTB7-Th which showed ∼7% efficiency and large scale phase separation. Our results show that long range exciton diffusion and large domains offer significant advantages for OPVs.

Original language	English
Pages (from-to)	15687-15694
Number of pages	8
Journal	Journal of Materials Chemistry
Volume	8
Issue number	31
DOIs	https://doi.org/10.1039/D0TA06017H
Publication status	Published - 21 Jul 2020

Access to Document

10.1039/D0TA06017HLicence: CC BY

Sajjad-2020-Long-rage-exciton-diffusion-JMC-15687-CC
Copyright © 2020 the Author(s). Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Final published version, 1.24 MBLicence: CC BY

H2020 MSCA - PHOTOPEROVSKITIES: H2020 MSCA Fellowship 2016 Lethy
Samuel, I. D. W. (PI)
European Commission
1/09/17 → 31/08/19
Project: Fellowship
Self-Assembled Organic Photovoltaic mat: Self-assembled organic photovoltaic materials
Samuel, I. D. W. (PI)
EPSRC
17/03/14 → 16/03/17
Project: Standard
Equipment Account: Characterisation and Manipulation of Advanced Functional Materials and their Interfaces at the Nanoscale
Samuel, I. D. W. (PI)
EPSRC
1/10/13 → 30/09/23
Project: Standard

Long-range Exciton Diffusion in Non-Fullerene Acceptors and Coarse Bulk Heterojunctions Enable Highly Efficient Organic Photovoltaics (dataset)
Sajjad, M. T. (Creator), Ruseckas, A. (Creator), Krishnan Jagadamma, L. (Creator), Zhang, Y. (Creator) & Samuel, I. D. W. (Creator), University of St Andrews, 19 Aug 2020
DOI: 10.17630/7bfdb2ad-def7-482b-82a8-4756b0d029c1
Dataset

File

Cite this

@article{062ee4397d79456196178b4ed8865bf6,

title = "Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics",

abstract = "We investigated singlet exciton diffusion in three ITIC derivatives used as electron acceptors in organic photovoltaics (OPVs) by time-resolved photoluminescence volume quenching and exciton–exciton annihilation. The exciton diffusion coefficient was found to be in the range of 0.003–0.007 cm2 s−1 which leads to a three-dimensional exciton diffusion length of up to 31 nm. We fabricated solar cells using bulk heterojunctions of these acceptors with the electron donor PTB7-Th which showed ∼7% efficiency and large scale phase separation. Our results show that long range exciton diffusion and large domains offer significant advantages for OPVs.",

author = "Sajjad, {Muhammad T.} and Arvydas Ruseckas and Jagadamma, {Lethy Krishnan} and Yiwei Zhang and Samuel, {Ifor D. W.}",

note = "Funding: We acknowledge support from the European Commission (European Research Council grant 321305) and Marie Sklodowska-Curie Individual Fellowship grant 745776. We are also grateful to EPSRC for support from grants (EP/L017008/1 and EP/L012294/1). ",

year = "2020",

month = jul,

day = "21",

doi = "10.1039/D0TA06017H",

language = "English",

volume = "8",

pages = "15687--15694",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

publisher = "Royal Society of Chemistry",

number = "31",

}

TY - JOUR

T1 - Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics

AU - Sajjad, Muhammad T.

AU - Ruseckas, Arvydas

AU - Jagadamma, Lethy Krishnan

AU - Zhang, Yiwei

AU - Samuel, Ifor D. W.

N1 - Funding: We acknowledge support from the European Commission (European Research Council grant 321305) and Marie Sklodowska-Curie Individual Fellowship grant 745776. We are also grateful to EPSRC for support from grants (EP/L017008/1 and EP/L012294/1).

PY - 2020/7/21

Y1 - 2020/7/21

N2 - We investigated singlet exciton diffusion in three ITIC derivatives used as electron acceptors in organic photovoltaics (OPVs) by time-resolved photoluminescence volume quenching and exciton–exciton annihilation. The exciton diffusion coefficient was found to be in the range of 0.003–0.007 cm2 s−1 which leads to a three-dimensional exciton diffusion length of up to 31 nm. We fabricated solar cells using bulk heterojunctions of these acceptors with the electron donor PTB7-Th which showed ∼7% efficiency and large scale phase separation. Our results show that long range exciton diffusion and large domains offer significant advantages for OPVs.

AB - We investigated singlet exciton diffusion in three ITIC derivatives used as electron acceptors in organic photovoltaics (OPVs) by time-resolved photoluminescence volume quenching and exciton–exciton annihilation. The exciton diffusion coefficient was found to be in the range of 0.003–0.007 cm2 s−1 which leads to a three-dimensional exciton diffusion length of up to 31 nm. We fabricated solar cells using bulk heterojunctions of these acceptors with the electron donor PTB7-Th which showed ∼7% efficiency and large scale phase separation. Our results show that long range exciton diffusion and large domains offer significant advantages for OPVs.

U2 - 10.1039/D0TA06017H

DO - 10.1039/D0TA06017H

M3 - Article

SN - 0959-9428

VL - 8

SP - 15687

EP - 15694

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 31

ER -

Long-range exciton diffusion in non-fullerene acceptors and coarse bulk heterojunctions enable highly efficient organic photovoltaics

Abstract

Access to Document

Fingerprint

Projects

H2020 MSCA - PHOTOPEROVSKITIES: H2020 MSCA Fellowship 2016 Lethy

Self-Assembled Organic Photovoltaic mat: Self-assembled organic photovoltaic materials

Equipment Account: Characterisation and Manipulation of Advanced Functional Materials and their Interfaces at the Nanoscale

Datasets

Long-range Exciton Diffusion in Non-Fullerene Acceptors and Coarse Bulk Heterojunctions Enable Highly Efficient Organic Photovoltaics (dataset)

Cite this