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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

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Published on: February 1, 2016

Solution-processed LiF for work function tuning in electrode bilayers.

Taner Aytun¹, Ayse Turak, Iain Baikie

¹Materials Science and Engineering Program, Sabanci University, Istanbul, 34956, Turkey.

|December 14, 2011

Summary

Solution-processed lithium fluoride (LiF) films offer a low-cost alternative to vacuum evaporation for organic solar cells. Nanoscale control of LiF particle deposition tunes electrode work function, enhancing device performance.

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Area of Science:

Materials Science
Organic Electronics
Nanotechnology

Background:

Low-cost organic solar cell (OSC) production relies on ambient processing.
High-vacuum thermal evaporation of lithium fluoride (LiF) is a bottleneck for cost-effective OSC manufacturing.
Alternative, solution-based methods for LiF electrode interlayer deposition are needed.

Purpose of the Study:

To explore solution processing of LiF as an alternative to vacuum thermal evaporation for electrode interlayers in organic solar cells.
To achieve controlled nanoscale surface coverage of LiF films using polymeric micelle reactors.
To investigate the effect of LiF nanoparticle coverage on the work function of electrode surfaces.

Main Methods:

Utilized polymeric micelle reactors for controlled deposition of submonolayer LiF films.
Employed scanning Kelvin probe microscopy to measure the work function of LiF-coated surfaces.
Varied nanoparticle coverage to study its impact on surface properties.

Main Results:

Successfully realized submonolayer LiF films with controlled nanoscale surface coverage.
Demonstrated that the work function of the electrode can be tuned by adjusting the nanoparticle coverage.
Observed higher work function values for LiF-coated surfaces compared to bare indium tin oxide (ITO).

Conclusions:

Solution processing of LiF using micelle reactors is a viable ambient-friendly alternative to vacuum evaporation.
Nanoscale control over LiF deposition allows for tunable work function modification of electrode interlayers.
This approach holds promise for advancing low-cost, high-performance organic solar cell fabrication.