Insights into Bulk‐Heterojunction Organic Solar Cells Processed from Green Solvent
| Autor: | Thuc-Quyen Nguyen, Harald Ade, Jianfei Huang, Nora Schopp, Zhi-Fang Du, Zhengxing Peng, Mathieu Mainville, Mario Leclerc, G. N. Manjunatha Reddy, Joachim Vollbrecht, Max Schrock, Sangmin Chae, Alana L. Dixon |
|---|---|
| Přispěvatelé: | Chemistry and Biochemistry [Santa Barbara] (CCS-UCSB), College of Creative Studies [Santa-Barbara] (CCS-UCSB), University of California [Santa Barbara] (UC Santa Barbara), University of California (UC)-University of California (UC)-University of California [Santa Barbara] (UC Santa Barbara), University of California (UC)-University of California (UC), Université Laval [Québec] (ULaval), North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC), University of Lille |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Organic solar cell Impedance spectroscopy Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Recombination Atomic and Molecular Physics and Optics Polymer solar cell 0104 chemical sciences Electronic Optical and Magnetic Materials Dielectric spectroscopy Solvent Solid-state nuclear magnetic resonance Chemical engineering Organic photovoltaics [CHIM]Chemical Sciences Green solvents Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Solar RRL Solar RRL, 2021, 5 (8), pp.2100213. ⟨10.1002/solr.202100213⟩ |
| ISSN: | 2367-198X |
| DOI: | 10.1002/solr.202100213 |
| Popis: | International audience; The environmental impact of solution processed organic solar cells (OSCs) can be mitigated by introducing so-called green solvents during the fabrication processes. However, the effects of such green solvents on the molecular-level structures and optoelectronic properties lack in-depth characterization. Here, insights into the structure–processing–property correlation of a PPDT2FBT:PC61BM bulk-heterojunction (BHJ) system processed from a green solvent, ortho-xylene (o-XY), is investigated in comparison with the same blend processed from a traditional halogenated solvent, chlorobenzene (CB). The BHJ blends are characterized with various techniques probing at difference length scales, and an increased donor:acceptor (D:A) interfacial area as well as well-mixed features in the bulk morphologies of the active layer are observed for the o-XY processed BHJ blend. Furthermore, molecular-level differences in the D–A intermolecular interactions at the BHJ interfaces in o-XY and CB cast films are elucidated by 2-dimensional solid-state nuclear magnetic resonance (ssNMR) measurements and analysis. These results are consistent with the device properties, suggesting that the green-solvent-processed devices have longer charge carrier lifetimes and faster charge carrier extraction. The optimized PPDT2FBT:PC61BM devices processed from o-XY can achieve a noteworthy higher power conversion efficiency (PCE) owing to a higher short-circuit current density and fill factor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text