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Park, Hyesung
Future Electronics and Energy Lab
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Naphthalene as a Thermal-Annealing-Free Volatile Solid Additive in Non-Fullerene Polymer Solar Cells with Improved Performance and Reproducibility

Author(s)
Zhong, LianKang, So-HueiOh, JiyeonJung, SungwooCho, YongjoonPark, GeunhyungLee, SeunglokYoon, Seong-JunPark, HyesungYang, Changduk
Issued Date
2022-08
DOI
10.1002/adfm.202201080
URI
https://scholarworks.unist.ac.kr/handle/201301/59001
Fulltext
https://onlinelibrary.wiley.com/doi/10.1002/adfm.202201080
Citation
ADVANCED FUNCTIONAL MATERIALS, v.32, no.33, pp.2201080
Abstract
Highly volatile solid additives have attracted much attention recently because they enhance molecular packing order and possibly solve the problems of poor reproducibility and instability of polymer solar cells (PSCs) with solvent additives. The shortcoming is that existing solid additives require thermal annealing (TA) to remove them from the active layer, leading to an increase in the complexity of the device fabrication process and morphology rearrangement problems. This study introduces a commercially available, low-cost, and highly volatile material, naphthalene (NA), as a solid additive used in PSCs based on PM6: Y6. NA is well mixed with a non-fullerene acceptor and can restrict excessive aggregation of the donor and acceptor, producing efficiencies comparable to PSCs processed by 1-chloronaphthalene (CN) solvent additive. As a result, a maximum power conversion efficiency (PCE) of 16.52% for NA-processed PSC is achieved, higher than that of a PCE of 16.07% for CN-processed PSC with TA. NA-processed PSCs exhibit comparable efficiencies (PCE of 16.10%) without TA treatment and higher reproducibility/stability than CN-processed PSCs. This study demonstrates a low-cost and excellent volatile solid additive to improve the device performance and the potential for exploring new solid additives that can readily be made volatile without TA.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1616-301X
Keyword (Author)
as-cast device processinghighly volatile solid additivesinhibition of excessive aggregationpolymer solar cellsreproducibility and stability
Keyword
PHASE-SEPARATIONRECOMBINATIONIMPROVED EFFICIENCY

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