Highly efficient polymer solar cells with printed photoactive layer: rational process transfer from spin-coating

Handle URI:
http://hdl.handle.net/10754/622412
Title:
Highly efficient polymer solar cells with printed photoactive layer: rational process transfer from spin-coating
Authors:
Zhao, Kui ( 0000-0001-9348-7943 ) ; Hu, Hanlin ( 0000-0001-5617-0998 ) ; Spada, E.; Jagadamma, Lethy Krishnan ( 0000-0003-4226-017X ) ; Yan, Buyi; Abdelsamie, Maged ( 0000-0002-4631-5409 ) ; Yang, Y.; Yu, L.; Munir, Rahim ( 0000-0002-6029-3760 ) ; Li, R.; Ngongang Ndjawa, Guy Olivier ( 0000-0001-7400-9540 ) ; Amassian, Aram ( 0000-0002-5734-1194 )
Abstract:
Scalable and continuous roll-to-roll manufacturing is at the heart of the promise of low-cost and high throughput manufacturing of solution-processed photovoltaics. Yet, to date the vast majority of champion organic solar cells reported in the literature rely on spin-coating of the photoactive bulk heterojunction (BHJ) layer, with the performance of printed solar cells lagging behind in most instances. Here, we investigate the performance gap between polymer solar cells prepared by spin-coating and blade-coating the BHJ layer for the important class of modern polymers exhibiting no long range crystalline order. We find that thickness parity does not always yield performance parity even when using identical formulations. Significant differences in the drying kinetics between the processes are found to be responsible for BHJ nanomorphology differences. We propose an approach which benchmarks the film drying kinetics and associated BHJ nanomorphology development against those of the champion laboratory devices prepared by spin-coating the BHJ layer by adjusting the process temperature. If the optimization requires the solution concentration to be changed, then it is crucial to maintain the additive-to-solute volume ratio. Emulating the drying kinetics of spin-coating is also shown to help achieve morphological and performance parities. We put this approach to the test and demonstrate printed PTB7:PC71BM polymer solar cells with efficiency of 9% and 6.5% PCEs on glass and flexible PET substrates, respectively. We further demonstrate performance parity for two other popular donor polymer systems exhibiting rigid backbones and absence of a long range crystalline order, achieving a PCE of 9.7%, the highest efficiency reported to date for a blade coated organic solar cell. The rational process transfer illustrated in this study should help the broader and successful adoption of scalable printing methods for these material systems.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Zhao K, Hu H, Spada E, Jagadamma LK, Yan B, et al. (2016) Highly efficient polymer solar cells with printed photoactive layer: rational process transfer from spin-coating. J Mater Chem A 4: 16036–16046. Available: http://dx.doi.org/10.1039/c6ta06258j.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. A
Issue Date:
5-Sep-2016
DOI:
10.1039/c6ta06258j
Type:
Article
ISSN:
2050-7488; 2050-7496
Sponsors:
The authors would like to thank Prof. Emmanuel P. Giannelis for help with acquisition of rheology data at Cornell University. Part of this work was supported by the KAUST Office of Competitive Research under Collaborative Research Grant (Round 1). AA would also like to thank SABIC for the Career Development SABIC Chair.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA06258J
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhao, Kuien
dc.contributor.authorHu, Hanlinen
dc.contributor.authorSpada, E.en
dc.contributor.authorJagadamma, Lethy Krishnanen
dc.contributor.authorYan, Buyien
dc.contributor.authorAbdelsamie, Mageden
dc.contributor.authorYang, Y.en
dc.contributor.authorYu, L.en
dc.contributor.authorMunir, Rahimen
dc.contributor.authorLi, R.en
dc.contributor.authorNgongang Ndjawa, Guy Olivieren
dc.contributor.authorAmassian, Aramen
dc.date.accessioned2017-01-02T09:28:29Z-
dc.date.available2017-01-02T09:28:29Z-
dc.date.issued2016-09-05en
dc.identifier.citationZhao K, Hu H, Spada E, Jagadamma LK, Yan B, et al. (2016) Highly efficient polymer solar cells with printed photoactive layer: rational process transfer from spin-coating. J Mater Chem A 4: 16036–16046. Available: http://dx.doi.org/10.1039/c6ta06258j.en
dc.identifier.issn2050-7488en
dc.identifier.issn2050-7496en
dc.identifier.doi10.1039/c6ta06258jen
dc.identifier.urihttp://hdl.handle.net/10754/622412-
dc.description.abstractScalable and continuous roll-to-roll manufacturing is at the heart of the promise of low-cost and high throughput manufacturing of solution-processed photovoltaics. Yet, to date the vast majority of champion organic solar cells reported in the literature rely on spin-coating of the photoactive bulk heterojunction (BHJ) layer, with the performance of printed solar cells lagging behind in most instances. Here, we investigate the performance gap between polymer solar cells prepared by spin-coating and blade-coating the BHJ layer for the important class of modern polymers exhibiting no long range crystalline order. We find that thickness parity does not always yield performance parity even when using identical formulations. Significant differences in the drying kinetics between the processes are found to be responsible for BHJ nanomorphology differences. We propose an approach which benchmarks the film drying kinetics and associated BHJ nanomorphology development against those of the champion laboratory devices prepared by spin-coating the BHJ layer by adjusting the process temperature. If the optimization requires the solution concentration to be changed, then it is crucial to maintain the additive-to-solute volume ratio. Emulating the drying kinetics of spin-coating is also shown to help achieve morphological and performance parities. We put this approach to the test and demonstrate printed PTB7:PC71BM polymer solar cells with efficiency of 9% and 6.5% PCEs on glass and flexible PET substrates, respectively. We further demonstrate performance parity for two other popular donor polymer systems exhibiting rigid backbones and absence of a long range crystalline order, achieving a PCE of 9.7%, the highest efficiency reported to date for a blade coated organic solar cell. The rational process transfer illustrated in this study should help the broader and successful adoption of scalable printing methods for these material systems.en
dc.description.sponsorshipThe authors would like to thank Prof. Emmanuel P. Giannelis for help with acquisition of rheology data at Cornell University. Part of this work was supported by the KAUST Office of Competitive Research under Collaborative Research Grant (Round 1). AA would also like to thank SABIC for the Career Development SABIC Chair.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA06258Jen
dc.titleHighly efficient polymer solar cells with printed photoactive layer: rational process transfer from spin-coatingen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJ. Mater. Chem. Aen
kaust.authorZhao, Kuien
kaust.authorHu, Hanlinen
kaust.authorSpada, E.en
kaust.authorJagadamma, Lethy Krishnanen
kaust.authorYan, Buyien
kaust.authorAbdelsamie, Mageden
kaust.authorYang, Y.en
kaust.authorYu, L.en
kaust.authorMunir, Rahimen
kaust.authorLi, R.en
kaust.authorNgongang Ndjawa, Guy Olivieren
kaust.authorAmassian, Aramen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.