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Adding a Third Component with Reduced Miscibility and Higher LUMO Level Enables Efficient Ternary Organic Solar Cells
- Source :
- ACS Energy Letters. 5:2711-2720
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- It is widely known that the miscibility between donor and acceptor is a crucial factor that affects the morphology and thus device performance of nonfullerene organic solar cells (OSCs). In this Letter, we show that incorporating a third component with lower miscibility and higher lowest unoccupied molecular orbital (LUMO) level into the state-of-the-art PM6:Y6 system can significantly enhance the performance of devices. The best results of the ternary devices are achieved by adding a small molecular acceptor named ITCPTC (similar to 5% w/w), which significantly improves the power conversion efficiency (PCE) of the host system from 16.44% to 17.42%. The higher LUMO of the third component increases the open-circuit voltage (V-oc), while the low miscibility enlarges the domains and leads to improved short-circuit current density (J(sc)) and fill factor (FF). The efficacy of this strategy is supported by using other nonfullerene third components including an asymmetric small molecule (N7IT) and a polymer acceptor (PF2-DTC), which play the same role as ITCPTC and boost the PCEs to 16.96% and 17.04%, respectively. Our approach can be potentially applied to a wide range of OSC material systems and should facilitate the development of the OSC field.
- Subjects :
- chemistry.chemical_classification
Materials science
Organic solar cell
Renewable Energy, Sustainability and the Environment
Energy conversion efficiency
Analytical chemistry
Energy Engineering and Power Technology
02 engineering and technology
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Small molecule
Miscibility
Acceptor
0104 chemical sciences
Fuel Technology
chemistry
Chemistry (miscellaneous)
Materials Chemistry
0210 nano-technology
Ternary operation
HOMO/LUMO
Subjects
Details
- ISSN :
- 23808195
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- ACS Energy Letters
- Accession number :
- edsair.doi...........e10d356bcab90981d46349a41707c588
- Full Text :
- https://doi.org/10.1021/acsenergylett.0c01364