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One‐Step Blade‐Coated Highly Efficient Nonfullerene Organic Solar Cells with a Self‐Assembled Interfacial Layer Enabled by Solvent Vapor Annealing
- Source :
- Solar RRL. 3:1900179
- Publication Year :
- 2019
- Publisher :
- Wiley, 2019.
-
Abstract
- A 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. Funding Agencies|NSFCNational Natural Science Foundation of China (NSFC) [61774077, 61274062, 11204106]; Guangzhou Science and Technology Plan Project [201804010295]; Research and Development Program in Key Areas of Guangdong Province [2019B090921002]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities; Sunflare Institute of Solar Energy, Jinan University; Swedish Government Research Area in Materials Science on Functional Materials at Linkoping University [200900971]; Jinan UniversityJinan University; King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) [OSR-2018-CARF/CCF-3079]; Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science FoundationNational Science Foundation (NSF) [DMR-1332208]
- Subjects :
- Materials science
Organic solar cell
Annealing (metallurgy)
Scanning electron microscope
Energy conversion efficiency
Materialkemi
Energy Engineering and Power Technology
Atomic and Molecular Physics, and Optics
Polymer solar cell
Surface energy
Electronic, Optical and Magnetic Materials
Indium tin oxide
Chemical engineering
X-ray photoelectron spectroscopy
Materials Chemistry
interfacial layer
nonfullerence organic solar cell
one-step doctor-blade
self-assembly
solvent vapor annealing
Electrical and Electronic Engineering
Subjects
Details
- ISSN :
- 2367198X
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- Solar RRL
- Accession number :
- edsair.doi.dedup.....fbcc32734e6a77011ced24f9f53a837f