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In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

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Water-Processed Organic Solar Cell with Efficiency Exceeding 11.

Chen Xie¹, Songqiang Liang¹, Guangye Zhang¹

¹College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China.

|October 14, 2022

Summary

This study introduces PM6:BTP-eC9 for eco-friendly organic photovoltaics (OPVs) using water-based nanoparticle dispersions. A novel surfactant-stripping technique achieved a record OPV efficiency exceeding 11%.

Keywords:

high efficiency organic solar cells solvent additive surfactant−stripped nanoparticle

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Area of Science:

Materials Science
Renewable Energy Technologies

Background:

Water processing offers an eco-friendly and commercially viable approach for organic photovoltaics (OPVs) fabrication.
Developing efficient water-borne nanoparticle (NP) dispersions is crucial for sustainable OPV manufacturing.

Purpose of the Study:

To synthesize a high-performance water-borne nanoparticle dispersion using the PM6:BTP-eC9 active material for ecofriendly OPVs.
To optimize morphology and enhance efficiency in water-processed OPVs through advanced NP synthesis techniques.

Main Methods:

Fabrication of water-borne nanoparticle (NP) dispersion of PM6:BTP-eC9.
Application of a surfactant-stripping technique combined with a poloxamer for NP purification.
Inclusion of 1,8-diiodooctane (DIO) as an additive during surfactant-stripped NP (ssNP) synthesis to control morphology.

Main Results:

Achieved a record power conversion efficiency exceeding 11% for water-processed organic photovoltaics (OPVs).
Demonstrated that the surfactant-stripping technique effectively purifies water-dispersed organic semiconducting NPs.
Showcased that DIO additive promotes a percolated microstructure within ssNPs, enhancing device performance.

Conclusions:

The developed water-borne ssNP synthesis, particularly with DIO additive, is a promising strategy for morphology optimization in NP OPVs.
This work paves the way for increased research and industrial production of ecofriendly, water-processed OPVs.
The findings highlight the potential of water processing for the sustainable manufacturing of high-efficiency organic photovoltaics.