Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years

Journal article
(Original article)


Publication Details

Author(s): Du X, Heumüller T, Gruber W, Classen A, Unruh T, Li N, Brabec C
Journal: Joule
Publisher: Cell Press
Publication year: 2019
Volume: 3
Journal issue: 1
Pages range: 215-226
ISSN: 2542-4351
Language: English


Abstract

Organic solar cells (OSCs) based on non-fullerene acceptors (NFAs) have developed very fast in recent years.
A proper balance among power conversion efficiency (PCE), stability,
and production cost needs further elaboration. Here we investigate the
industrial viability of highly efficient OSCs based on several representative NFAs. The most stable OSCs exhibit PCE of ∼8% along with extrapolated T 80 lifetime
(80% of the initial PCE) of over 11,000 hr under equivalent 1 sun
illumination, which would lead to a very impressive operational lifetime approaching 10 years.
Photo-stability is strongly dependent on the end-group and side-chain
engineering of the NFAs. Breaking of conjugation during photo-aging
leads to increased energetic traps. Fluorination of the end-group
stabilizes molecules against light soaking, while adding methyl groups
shows an opposite trend. Side-chain modification can significantly
influence the morphological stability. Reducing synthetic complexity of
this class of NFAs will ultimately push the organic photovoltaics
technology into real-life applications. © 2018 Elsevier Inc.


We investigate the industrial viability of highly efficient organic solar cells (OSCs) based on several representative non-fullerene acceptors
(NFAs) by taking into consideration the three essential parameters:
power conversion efficiency, photo-stability, and materials cost.
End-group and side-chain modifications of NFAs strongly influence
long-term photo-stability. Promising extrapolated operational lifetime approaching 10 years
has been demonstrated with the most stable system. Industrial figure of
merit (i-FoM) analysis highlights the importance of lowering the
synthetic complexity of the NFAs for commercialization of this
technology. © 2018 Elsevier Inc.


Organic solar cells with non-fullerene acceptors (NFAs) have developed rapidly in recent years.
Breakthroughs in power conversion efficiency (PCE) have significantly
raised the confidence in the community for commercialization of this
technology. In the phase of developing new materials via molecular
engineering, more attention should be paid on industrial figure of merit
(i-FoM), which considers the balance of PCE, stability, and production
cost. Here we investigate industrial viability of highly efficient organic solar cells based
on several representative NFAs. Molecular engineering on both
end-groups and side chains significantly influences the long-term
stability of organic solar cells
by altering the intrinsic chemical stability of the molecules under
light soaking as well as morphological stability. Promising lifetime approaching 10 years
is demonstrated in stable candidates. Reducing synthetic complexity is
highlighted in order to push this technology into real-life application


FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Classen, Andrej
Institute Materials for Electronics and Energy Technology (i-MEET)
Du, Xiaoyan
Institute Materials for Electronics and Energy Technology (i-MEET)
Heumüller, Thomas Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Additional Organisation
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Research Fields

Neue Materialien und Prozesse
Research focus area of a faculty: Technische Fakultät


How to cite

APA:
Du, X., Heumüller, T., Gruber, W., Classen, A., Unruh, T., Li, N., & Brabec, C. (2019). Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years. Joule, 3(1), 215-226. https://dx.doi.org/10.1016/j.joule.2018.09.001

MLA:
Du, Xiaoyan, et al. "Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years." Joule 3.1 (2019): 215-226.

BibTeX: 

Last updated on 2019-23-07 at 09:48