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Extraction Current Transients for Selective Charge-Carrier Mobility Determination in Non-Fullerene and Ternary Bulk Heterojunction Organic Solar Cells

Staffan Dahlström, Xiaoyu Liu, Yajie Yan, Oskar Sandberg Orcid Logo, Mathias Nyman, Ziqi Liang, Ronald Österbacka

ACS Applied Energy Materials, Volume: 3, Issue: 9, Pages: 9190 - 9197

Swansea University Author: Oskar Sandberg Orcid Logo

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DOI (Published version): 10.1021/acsaem.0c01539

Abstract

The field of organic solar cells has recently gained broad research interest due to the introduction of non-fullerene small-molecule acceptors. The rapid improvement in solar cell efficiency put increased demand on moving toward scalable device architectures. An essential step toward this is enablin...

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Published in: ACS Applied Energy Materials
ISSN: 2574-0962 2574-0962
Published: American Chemical Society (ACS) 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa57802
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Abstract: The field of organic solar cells has recently gained broad research interest due to the introduction of non-fullerene small-molecule acceptors. The rapid improvement in solar cell efficiency put increased demand on moving toward scalable device architectures. An essential step toward this is enabling thicker active layers for which the hole and electron mobilities and their ratio become increasingly important. In this work, we demonstrate selective charge-carrier mobility determination using the charge extraction by a linearly increasing voltage (CELIV) method. By tuning the contact properties of the solar cell diodes, the hole and electron mobilities are determined separately using the recently developed metal–intrinsic semiconductor–metal-CELIV (MIM-CELIV) technique. Balanced mobility is measured both in non-fullerene and in ternary blends with the recently published PBBF11 polymer. The mobility results are confirmed using the well-established metal–insulator–semiconductor (MIS) and photo-CELIV techniques.
Keywords: Electrical and Electronic Engineering, Materials Chemistry, Electrochemistry, Energy Engineering and Power Technology, Chemical Engineering (miscellaneous)
College: College of Science
Funders: Academy of Finland Grant: 326000 Identifier: FundRef 10.13039/501100002341 Jane ja Aatos Erkon S??ti? Identifier: FundRef 10.13039/501100004012 Suomalainen Tiedeakatemia Identifier: FundRef 10.13039/501100002342 Science and Technology Commission of Shanghai Municipality Grant: 17520710100 Identifier: FundRef 10.13039/501100003399 Svenska Litteraturs?llskapet i Finland Identifier: FundRef 10.13039/501100009436
Issue: 9
Start Page: 9190
End Page: 9197