One-Step Blade-Coated Highly Efficient Nonfullerene Organic Solar Cells with a Self-Assembled Interfacial Layer Enabled by Solvent Vapor Annealing
Anthopoulos, Thomas D.
KAUST DepartmentKAUST Solar Center
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberOSR-2018-CARF/CCF-3079. C.M.
Permanent link to this recordhttp://hdl.handle.net/10754/656266
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AbstractA pronounced enhancement of the power conversion efficiency (PCE) by 38% is achieved in one-step doctor-blade printing organic solar cells (OSCs) via a simple solvent vapor annealing (SVA) step. The organic blend composed of a donor polymer, a nonfullerene acceptor, and an interfacial layer (IL) molecular component is found to phase-separate vertically when exposed to a solvent vapor-saturated atmosphere. Remarkably, the spontaneous formation of a fine, self-organized IL between the bulk heterojunction (BHJ) layer and the indium tin oxide (ITO) electrode facilitated by SVA yields solar cells with a significantly higher PCE (11.14%) than in control devices (8.05%) without SVA and in devices (10.06%) made with the more complex two-step doctor-blade printing method. The stratified nature of the ITO/IL/BHJ/cathode is corroborated by a range of complementary characterization techniques including surface energy, cross-sectional scanning electron microscopy, grazing incidence wide angle X-ray scattering, and X-ray photoelectron spectroscopy. This study demonstrates that a spontaneously formed IL with SVA treatment combines simplicity and precision with high device performance, thus making it attractive for large-area manufacturing of next-generation OSCs.
CitationLin, Y., Yu, L., Xia, Y., Firdaus, Y., Dong, S., Müller, C., … Hou, L. (2019). One-Step Blade-Coated Highly Efficient Nonfullerene Organic Solar Cells with a Self-Assembled Interfacial Layer Enabled by Solvent Vapor Annealing. Solar RRL, 3(8), 1900179. doi:10.1002/solr.201900179
SponsorsThe authors are grateful to the NSFC Project (61774077, 61274062, 11204106), the Guangzhou Science and Technology Plan Project (201804010295), the Research and Development Program in Key Areas of Guangdong Province (2019B090921002), and the Fundamental Research Funds for the Central Universities for financial support. L.H. acknowledges the support from Sunflare Institute of Solar Energy, Jinan University. F.Z. acknowledges the Swedish Government Research Area in Materials Science on Functional Materials at Linköping University (Faculty Grant SFO-Mat-LiU No. 200900971) and the collaboration between Linköping University and Jinan University supported by Jinan University. T.D.A., Y.L., and Y.F. acknowledge the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079. C.M. and F.Z. acknowledge the financial support from the Knut and Alice Wallenberg Foundation through the project “Mastering Morphology for Solution-borne Electronics”. L.Y. and C.M. thank Cornell High Energy Synchrotron Source (CHESS, supported by the National Science Foundation under award DMR-1332208) for providing the experiment time for the GIWAXS measurements.