Abstract
This work is part of the interlaboratory collaboration to study the stability of organic solar cells containing PCDTBT polymer as a donor material. The varieties of the OPV devices with different device architectures, electrode materials, encapsulation, and device dimensions were prepared by seven research laboratories. Sets of identical devices were aged according to four different protocols: shelf lifetime, laboratory weathering under simulated illumination at ambient temperature, laboratory weathering under simulated illumination, and elevated temperature (65 °C) and daylight outdoor weathering under sunlight. The results generated in this study allow us to outline several general conclusions related to PCDTBT-based bulk heterojunction (BHJ) solar cells. The results herein reported can be considered as practical guidance for the realization of stabilization approaches in BHJ solar cells containing PCDTBT.
Similar content being viewed by others
References
R. Søndergaard, M. Hösel, D. Angmo, T.T. Larsen-Olsen, and F.C. Krebs: Roll-to-roll fabrication of polymer solar cells. Mater. Today 15, 36–49 (2012).
H. Youn, H.J. Park, and L.J. Guo: Organic photovoltaic cells: From performance improvement to manufacturing processes. Small 11, 2228–2246 (2015).
A.J. Heeger: Semiconducting polymers: The third generation. Chem. Soc. Rev. 39, 2354–2371 (2010).
Available at: http://www.heliatek.com/en/press/press-releases/details/heliatek-sets-new-organic-photovoltaic-world-record-efficiency-of-13-2.
J. Zhao, Y. Li, G. Yang, K. Jiang, H. Lin, H. Ade, W. Ma, and H. Yan: Efficient organic solar cells processed from hydrocarbon solvents. Nat. Energy 1, 15027 (2016).
W. Zhao, S. Li, H. Yao, S. Zhang, Y. Zhang, B. Yang, and J. Hou: Molecular optimization enables over 13% efficiency in organic solar cells. J. Am. Chem. Soc. 139, 7148–7151 (2017).
G. Li, W-H. Chang, and Y. Yang: Low-bandgap conjugated polymers enabling solution-processable tandem solar cells. Nat. Rev. Mater. 2, 17043 (2017).
S. Beaupre and M. Leclerc: PCDTBT: En route for low cost plastic solar cells. J. Mater. Chem. A 1, 11097–11105 (2013).
C.H. Peters, I.T. Sachs-Quintana, J.P. Kastrop, S. Beaupré, M. Leclerc, and M.D. McGehee: High efficiency polymer solar cells with long operating lifetimes. Adv. Energy Mater. 1, 491–494 (2011).
D.H. Wang, J.K. Kim, J.H. Seo, O.O. Park, and J.H. Park: Stability comparison: A PCDTBT/PC71BM bulk-heterojunction versus a P3HT/PC71BM bulk-heterojunction. Sol. Energy Mater. Sol. Cells 101 (Suppl. C), 249–255 (2012).
T. Heumueller, W.R. Mateker, A. Distler, U.F. Fritze, R. Cheacharoen, W.H. Nguyen, M. Biele, M. Salvador, M. von Delius, H-J. Egelhaaf, M.D. McGehee, and C.J. Brabec: Morphological and electrical control of fullerene dimerization determines organic photovoltaic stability. Energy Environ. Sci. 9, 247–256 (2016).
N. Gasparini, M. Salvador, S. Strohm, T. Heumueller, I. Levchuk, A. Wadsworth, J.H. Bannock, J.C. de Mello, H-J. Egelhaaf, D. Baran, I. McCulloch, and C.J. Brabec: Burn-in free nonfullerene-based organic solar cells. Adv. Energy Mater. 7, 1700770 (2017).
O. Synooka, K-R. Eberhardt, C.R. Singh, F. Hermann, G. Ecke, B. Ecker, E. von Hauff, G. Gobsch, and H. Hoppe: Influence of thermal annealing on PCDTBT:PCBM composition profiles. Adv. Energy Mater. 4, 1300981 (2014).
T. Wang, A.J. Pearson, A.D.F. Dunbar, P.A. Staniec, D.C. Watters, H. Yi, A.J. Ryan, R.A.L. Jones, A. Iraqi, and D.G. Lidzey: Correlating structure with function in thermally annealed PCDTBT:PC70BM photovoltaic blends. Adv. Funct. Mater. 22, 1399–1408 (2012).
Z. Li, K.H. Chiu, R. Shahid Ashraf, S. Fearn, R. Dattani, H. Cheng Wong, C-H. Tan, J. Wu, J.T. Cabral, and J.R. Durrant: Toward improved lifetimes of organic solar cells under thermal stress: Substrate-dependent morphological stability of PCDTBT:PCBM films and devices. Sci. Rep. 5, 15149 (2015).
J.W. Kingsley, P.P. Marchisio, H. Yi, A. Iraqi, C.J. Kinane, S. Langridge, R.L. Thompson, A.J. Cadby, A.J. Pearson, D.G. Lidzey, R.A.L. Jones, and A.J. Parnell: Molecular weight dependent vertical composition profiles of PCDTBT:PC(71)BM blends for organic photovoltaics. Sci. Rep. 4, 5286 (2014).
A. Katsouras, N. Gasparini, C. Koulogiannis, M. Spanos, T. Ameri, C.J. Brabec, C.L. Chochos, and A. Avgeropoulos: Systematic analysis of polymer molecular weight influence on the organic photovoltaic performance. Macromol. Rapid Commun. 36, 1778–1797 (2015).
P. Cheng, C. Yan, Y. Wu, J. Wang, M. Qin, Q. An, J. Cao, L. Huo, F. Zhang, L. Ding, Y. Sun, W. Ma, and X. Zhan: Alloy acceptor: Superior alternative to PCBM toward efficient and stable organic solar cells. Adv. Mater. 28, 8021–8028 (2016).
W.R. Mateker, I.T. Sachs-Quintana, G.F. Burkhard, R. Cheacharoen, and M.D. McGehee: Minimal long-term intrinsic degradation observed in a polymer solar cell illuminated in an oxygen-free environment. Chem. Mater. 27, 404–407 (2015).
S. Alem, T-Y. Chu, S.C. Tse, S. Wakim, J. Lu, R. Movileanu, Y. Tao, F. Bélanger, D. Désilets, S. Beaupré, M. Leclerc, S. Rodman, D. Waller, and R. Gaudiana: Effect of mixed solvents on PCDTBT:PC70BM based solar cells. Org. Electron. 12, 1788–1793 (2011).
P-K. Shin, P. Kumar, A. Kumar, S. Kannappan, and S. Ochiai: Effects of organic solvents for composite active layer of PCDTBT/PC71BM on characteristics of organic solar cell devices. Int. J. Photoenergy 2014, 8 (2014).
L. Ciammaruchi, F. Brunetti, and I. Visoly-Fisher: Solvent effects on the morphology and stability of PTB7:PCBM based solar cells. Sol. Energy 137 (Suppl. C), 490–499 (2016).
G. Fang, J. Liu, Y. Fu, B. Meng, B. Zhang, Z. Xie, and L. Wang: Improving the nanoscale morphology and processibility for PCDTBT-based polymer solar cells via solvent mixtures. Org. Electron. 13, 2733–2740 (2012).
C.H. Peters, I.T. Sachs-Quintana, W.R. Mateker, T. Heumueller, J. Rivnay, R. Noriega, Z.M. Beiley, E.T. Hoke, A. Salleo, and M.D. McGehee: The mechanism of burn-in loss in a high efficiency polymer solar cell. Adv. Mater. 24, 663–668 (2012).
J. Kong, S. Song, M. Yoo, G.Y. Lee, O. Kwon, J.K. Park, H. Back, G. Kim, S.H. Lee, H. Suh, and K. Lee: Long-term stable polymer solar cells with significantly reduced burn-in loss. Nat. Commun. 5, 5688 (2014).
R. Roesch, K-R. Eberhardt, S. Engmann, G. Gobsch, and H. Hoppe: Polymer solar cells with enhanced lifetime by improved electrode stability and sealing. Sol. Energy Mater. Sol. Cells 117 (Suppl. C), 59–66 (2013).
Y. Zhang, E. Bovill, J. Kingsley, A.R. Buckley, H. Yi, A. Iraqi, T. Wang, and D.G. Lidzey: PCDTBT based solar cells: One year of operation under real-world conditions. Sci. Rep. 6, 21632 (2016).
J. Adams, M. Salvador, L. Lucera, S. Langner, G.D. Spyropoulos, F.W. Fecher, M.M. Voigt, S.A. Dowland, A. Osvet, H-J. Egelhaaf, and C.J. Brabec: Water ingress in encapsulated inverted organic solar cells: Correlating infrared imaging and photovoltaic performance. Adv. Energy Mater. 5, 1501065 (2015).
V. Turkovic, S. Engmann, D.A.M. Egbe, M. Himmerlich, S. Krischok, G. Gobsch, and H. Hoppe: Multiple stress degradation analysis of the active layer in organic photovoltaics. Sol. Energy Mater. Sol. Cells 120 (Part B), 654–668 (2014).
E. Voroshazi, I. Cardinaletti, T. Conard, and B.P. Rand: Light-induced degradation of polymer:fullerene photovoltaic devices: An intrinsic or material-dependent failure mechanism? Adv. Energy Mater. 4, 1400848 (2014).
M.O. Reese, S.A. Gevorgyan, M. Jørgensen, E. Bundgaard, S.R. Kurtz, D.S. Ginley, D.C. Olson, M.T. Lloyd, P. Morvillo, E.A. Katz, A. Elschner, O. Haillant, T.R. Currier, V. Shrotriya, M. Hermenau, M. Riede, K.R. Kirov, G. Trimmel, T. Rath, O. Inganäs, F. Zhang, M. Andersson, K. Tvingstedt, M. Lira-Cantu, D. Laird, C. McGuiness, S. Gowrisanker, M. Pannone, M. Xiao, J. Hauch, R. Steim, D.M. DeLongchamp, R. Rösch, H. Hoppe, N. Espinosa, A. Urbina, G. Yaman-Uzunoglu, J-B. Bonekamp, A.J.J.M. van Breemen, C. Girotto, E. Voroshazi, and F.C. Krebs: Consensus stability testing protocols for organic photovoltaic materials and devices. Sol. Energy Mater. Sol. Cells 95, 1253–1267 (2011).
J. Kettle, N. Bristow, D.T. Gethin, Z. Tehrani, O. Moudam, B. Li, E.A. Katz, G.A. dos Reis Benatto, and F.C. Krebs: Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics. Sol. Energy Mater. Sol. Cells 144 (Suppl. C), 481–487 (2016).
Q. Burlingame, G. Zanotti, L. Ciammaruchi, E.A. Katz, and S.R. Forrest: Outdoor operation of small-molecule organic photovoltaics. Org. Electron. 41 (Suppl. C), 274–279 (2017).
S.A. Gevorgyan, N. Espinosa, L. Ciammaruchi, B. Roth, F. Livi, S. Tsopanidis, S. Zufle, S. Queiros, A. Gregori, G.A.D. Benatto, M. Corazza, M.V. Madsen, M. Hosel, M.J. Beliatis, T.T. Larsen-Olsen, F. Pastorelli, A. Castro, A. Mingorance, V. Lenzi, D. Fluhr, R. Roesch, M.M.D. Ramos, A. Savva, H. Hoppe, L.S.A. Marques, I. Burgues, E. Georgiou, L. Serrano-Lujan, and F.C. Krebs: Baselines for lifetime of organic solar cells. Adv. Energy Mater. 6, 1600910 (2016).
S.A. Gevorgyan, M.V. Madsen, B. Roth, M. Corazza, M. Hösel, R.R. Søndergaard, M. Jørgensen, and F.C. Krebs: Lifetime of organic photovoltaics: Status and predictions. Adv. Energy Mater. 6, 1501208 (2016).
H.J. Son, B. Carsten, I.H. Jung, and L. Yu: Overcoming efficiency challenges in organic solar cells: Rational development of conjugated polymers. Energy Environ. Sci. 5, 8158–8170 (2012).
A. Zen, J. Pflaum, S. Hirschmann, W. Zhuang, F. Jaiser, U. Asawapirom, J.P. Rabe, U. Scherf, and D. Neher: Effect of molecular weight and annealing of poly(3-hexylthiophene)s on the performance of organic field-effect transistors. Adv. Funct. Mater. 14, 757–764 (2004).
W. Ma, J.Y. Kim, K. Lee, and A.J. Heeger: Effect of the molecular weight of poly(3-hexylthiophene) on the morphology and performance of polymer bulk heterojunction solar cells. Macromol. Rapid Commun. 28, 1776–1780 (2007).
M. Koppe, C.J. Brabec, S. Heiml, A. Schausberger, W. Duffy, M. Heeney, and I. McCulloch: Influence of molecular weight distribution on the gelation of P3HT and its impact on the photovoltaic performance. Macromolecules 42, 4661–4666 (2009).
R.J. Kline, M.D. McGehee, E.N. Kadnikova, J.S. Liu, J.M.J. Frechet, and M.F. Toney: Dependence of regioregular poly(3-hexylthiophene) film morphology and field-effect mobility on molecular weight. Macromolecules 38, 3312–3319 (2005).
Z. Ding, J. Kettle, M. Horie, S.W. Chang, G.C. Smith, A.I. Shames, and E.A. Katz: Efficient solar cells are more stable: The impact of polymer molecular weight on performance of organic photovoltaics. J. Mater. Chem. A 4, 7274–7280 (2016).
L.A. Frolova, N.P. Piven, D.K. Susarova, A.V. Akkuratov, S.D. Babenko, and P.A. Troshin: ESR spectroscopy for monitoring the photochemical and thermal degradation of conjugated polymers used as electron donor materials in organic bulk heterojunction solar cells. Chem. Commun. 51, 2242–2244 (2015).
D.K. Susarova, N.P. Piven, A.V. Akkuratov, L.A. Frolova, M.S. Polinskaya, S.A. Ponomarenko, S.D. Babenko, and P.A. Troshin: ESR spectroscopy as a powerful tool for probing the quality of conjugated polymers designed for photovoltaic applications. Chem. Commun. 51, 2239–2241 (2015).
A.I. Shames, L.N. Inasaridze, A.V. Akkuratov, A.E. Goryachev, E.A. Katz, and P.A. Troshin: Assessing the outdoor photochemical stability of conjugated polymers by EPR spectroscopy. J. Mater. Chem. A 4, 13166–13170 (2016).
T.S. Glen, N.W. Scarratt, H. Yi, A. Iraqi, T. Wang, J. Kingsley, A.R. Buckley, D.G. Lidzey, and A.M. Donald: Dependence on material choice of degradation of organic solar cells following exposure to humid air. J. Polym. Sci., Part B: Polym. Phys. 54, 216–224 (2016).
B. Paci, A. Generosi, V. Rossi Albertini, P. Perfetti, R. de Bettignies, and C. Sentein: Time-resolved morphological study of organic thin film solar cells based on calcium/aluminium cathode material. Chem. Phys. Lett. 461, 77–81 (2008).
Z.Y. Liu, M.M. Tian, and N. Wang: Influences of Alq3 as electron extraction layer instead of Ca on the photo-stability of organic solar cells. J. Power Sources 250, 105–109 (2014).
S. Cros, M. Firon, S. Lenfant, P. Trouslard, and L. Beck: Study of thin calcium electrode degradation by ion beam analysis. Nucl. Instrum. Methods Phys. Res., Sect. B 251, 257–260 (2006).
T.S. Glen, N.W. Scarratt, H. Yi, A. Iraqi, T. Wang, J. Kingsley, A.R. Buckley, D.G. Lidzey, and A.M. Donald: Grain size dependence of degradation of aluminium/calcium cathodes in organic solar cells following exposure to humid air. Sol. Energy Mater. Sol. Cells 140 (Suppl. C), 25–32 (2015).
M.T. Lloyd, D.C. Olson, P. Lu, E. Fang, D.L. Moore, M.S. White, M.O. Reese, D.S. Ginley, and J.W.P. Hsu: Impact of contact evolution on the shelf life of organic solar cells. J. Mater. Chem. 19, 7638–7642 (2009).
N. Karst and J.C. Bernède: On the improvement of the open circuit voltage of plastic solar cells by the presence of a thin aluminium oxide layer at the interface organic/aluminium. Phys. Status Solidi A 203, R70–R72 (2006).
M.T. Lloyd, C.H. Peters, A. Garcia, I.V. Kauvar, J.J. Berry, M.O. Reese, M.D. McGehee, D.S. Ginley, and D.C. Olson: Influence of the hole-transport layer on the initial behavior and lifetime of inverted organic photovoltaics. Sol. Energy Mater. Sol. Cells 95, 1382–1388 (2011).
D.M. Tanenbaum, H.F. Dam, R. Roesch, M. Jorgensen, H. Hoppe, and F.C. Krebs: Edge sealing for low cost stability enhancement of roll-to-roll processed flexible polymer solar cell modules. Sol. Energy Mater. Sol. Cells 97, 157–163 (2012).
Y.W. Zhang, E. Bovill, J. Kingsley, A.R. Buckley, H.N. Yi, A. Iraqi, T. Wang, and D.G. Lidzey: PCDTBT based solar cells: One year of operation under real-world conditions. Sci. Rep. 6, 21632 (2016).
A. Tournebize, P.O. Bussiere, P. Wong-Wah-Chung, S. Therias, A. Rivaton, J.L. Gardette, S. Beaupre, and M. Leclerc: Impact of UV-visible light on the morphological and photochemical behavior of a low-bandgap poly(2,7-carbazole) derivative for use in high-performance solar cells. Adv. Energy Mater. 3, 478–487 (2013).
A. Tournebize, A. Rivaton, J-L. Gardette, C. Lombard, B. Pepin-Donat, S. Beaupre, and M. Leclerc: How photoinduced crosslinking under operating conditions can reduce PCDTBT-based solar cell efficiency and then stabilize it. Adv. Energy Mater. 4, 1 (2014).
L.N. Inasaridze, A.I. Shames, I.V. Martynov, B. Li, A.V. Mumyatov, D.K. Susarova, E.A. Katz, and P.A. Troshin: Light-induced generation of free radicals by fullerene derivatives: An important degradation pathway in organic photovoltaics? J. Mater. Chem. A 5, 8044–8050 (2017).
Z. Li, K.H. Chiu, R.S. Ashraf, S. Fearn, R. Dattani, H.C. Wong, C.H. Tan, J.Y. Wu, J.T. Cabral, and J.R. Durrant: Toward improved lifetimes of organic solar cells under thermal stress: Substrate-dependent morphological stability of PCDTBT:PCBM films and devices. Sci. Rep. 5, 15149 (2015).
E. Voroshazi, B. Verreet, A. Buri, R. Mueller, D. Di Nuzzo, and P. Heremans: Influence of cathode oxidation via the hole extraction layer in polymer:fullerene solar cells. Org. Electron. 12, 736–744 (2011).
S. Nair, M. Kathiresan, T. Mukundan, and V. Natarajan: Passivation of organic field effect transistor with photopatterned Parylene to improve environmental stability. Microelectron. Eng. 163, 36–42 (2016).
M. Giannouli, V.M. Drakonakis, A. Savva, P. Eleftheriou, G. Florides, and S.A. Choulis: Methods for improving the lifetime performance of organic photovoltaics with low-costing encapsulation. ChemPhysChem 16, 1134–1154 (2015).
J. Won Lim, C. Kyu Jin, K. Yong Lim, Y. Jae Lee, S-R. Kim, B-I. Choi, T. Whan Kim, D. Ha Kim, D. Kyung Hwang, and W. Kook Choi: Transparent high-performance SiOxNy/SiOx barrier films for organic photovoltaic cells with high durability. Nano Energy 33 (Suppl. C), 12–20 (2017).
F. Dollinger, F. Nehm, L. Müller-Meskamp, and K. Leo: Laminated aluminum thin-films as low-cost opaque moisture ultra-barriers for flexible organic electronic devices. Org. Electron. 46 (Suppl. C), 242–246 (2017).
A. Morlier, S. Cros, J-P. Garandet, and N. Alberola: Gas barrier properties of solution processed composite multilayer structures for organic solar cells encapsulation. Sol. Energy Mater. Sol. Cells 115 (Suppl. C), 93–99 (2013).
T. Nam, Y.J. Park, H. Lee, I-K. Oh, J-H. Ahn, S.M. Cho, H. Kim, and H-B-R. Lee: A composite layer of atomic-layer-deposited Al2O3 and graphene for flexible moisture barrier. Carbon 116 (Suppl. C), 553–561 (2017).
P. Cheng and X.W. Zhan: Stability of organic solar cells: Challenges and strategies. Chem. Soc. Rev. 45, 2544–2582 (2016).
M. Salvador, N. Gasparini, J.D. Perea, S.H. Paleti, A. Distler, L.N. Inasaridze, P.A. Troshin, L. Luer, H-J. Egelhaaf, and C. Brabec: Suppressing photooxidation of conjugated polymers and their blends with fullerenes through nickel chelates. Energy Environ. Sci. 10, 2005–2016 (2017).
V. Turkovic, S. Engmann, N. Tsierkezos, H. Hoppe, M. Madsen, H-G. Rubahn, U. Ritter, and G. Gobsch: Long-term stabilization of organic solar cells using hydroperoxide decomposers as additives. Appl. Phys. A 122, 1–6 (2016).
V. Turkovic, S. Engmann, N. Tsierkezos, H. Hoppe, U. Ritter, and G. Gobsch: Long-term stabilization of organic solar cells using hindered phenols as additives. ACS Appl. Mater. Interfaces 6, 18525–18537 (2014).
V. Turkovic, S. Engmann, N.G. Tsierkezos, H. Hoppe, M. Madsen, H.G. Rubahn, U. Ritter, and G. Gobsch: Long-term stabilization of organic solar cells using UV absorbers. J. Phys. D: Appl. Phys. 49, 125604 (2016).
ACKNOWLEDGMENTS
This work was supported by the European Commission’s StableNextSol COST Action MP1307.
(1) Sjoerd Veenstra, Santhosh Shanmugam, and Yulia Galagan acknowledge Solliance, a partnership of R&D organizations from the Netherlands, Belgium, and Germany working in thin film photovoltaic solar energy.
(2) Ana Charas acknowledges Fundação para a Ciência e Tecnologia (FCT-Portugal) for funding through the project UID/EEA/50008/2013.
(3) Vida Turkovic, Horst-Günter Rubahn, and Morten Madsen acknowledge ‘Det Frie Forskningsråd DFF FTP’ for funding of the project Stabil-O and Villum Foundation for funding of the project Compliant-PV, Project No. 13365.
(4) Gloria Zanotti is thankful to the Ente Nazionale Energia e Ambiente (ENEA) and to the Italian Ministry of Foreign Affairs for a visitor post-doc fellowship to Ben Gurion University of the Negev.
(5) Tulus acknowledges the Ministry of Research, Technology and High Education, the Republic of Indonesia (RISET-Pro Scholarship). Tulus and Elizabeth von Hauff acknowledge Fundamental Research on Matter (FOM) (V0714M-13MV60) from the Netherlands Organization for Scientific Research (NWO) for funding.
(6) Rickard Hansson and Ellen Moons thank Dr. Jakub Rysz of the Institute of Physics, Jagiellonian University, for sharing device preparation details and also acknowledge financial support from the Swedish Research Council, Grant No. 2015-03778, the Swedish Energy Council, Contract No. 38327-1, and the Göran Gustafsson Foundation for Research in Natural Sciences and Medicine.
(7) L.F. Marsal, J. Ferre-Borrull, and J.G. Sánchez thank the Spanish Ministry of Economy, Industry and Competitiveness (MEIC) for grant numbers, TEC2015-71915-REDT and TEC2015-71324-R (MINECO/FEDER), the ICREA for the ICREA Academia Award, and the Catalan authority for project AGAUR 2017 SGR 1527.
(8) Francesca Brunetti B acknowledges the FP7-European Project No. 609788 “CHEETAH—Cost-reduction through material optimization and Higher EnErgy outpuT of solAr pHotovoltaic modules”.
Author information
Authors and Affiliations
Corresponding author
Supporting Information
Rights and permissions
About this article
Cite this article
Ciammaruchi, L., Oliveira, R., Charas, A. et al. Stability of organic solar cells with PCDTBT donor polymer: An interlaboratory study. Journal of Materials Research 33, 1909–1924 (2018). https://doi.org/10.1557/jmr.2018.163
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/jmr.2018.163