Transparent light-emitting electrochemical cells with acid treated multi-wall carbon nanotubes as a top electrode

• Published in: Journal of alloys and compounds 2023-12, Vol.968, p.172201, Article 172201
• Main Authors: Bodiago, E.V., Gets, D.S., Ryabov, D.R., Zelenkov, L.E., Makarov, S.V., Zakhidov, A.A.
• Format: Article
• Language: English
• Subjects: Acid treatment; Carbon nanotubes; Halide perovskites; Light-emitting electrochemical cells; Semitransparent
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.172201

Halide perovskite light-emitting electrochemical cells (LEC) are color-tunable, efficient, simple, and low-cost single-layer devices, which can be designed in semitransparent architectures for various lightening and display. However, development of highly transparent and conductive electrodes for these devices is a challenging task, requiring not only optimization of the electrode material parameters, but also stable performance without chemical reactions at interfaces. Here we employ multi-walled carbon nanotubes with substantially improved optical and transport properties after their additional chemical processing for efficient semitransparent perovskite LEC. In particular, we develop single-layer perovskite-based LECs with transparency 56%, brightness up to 1625 cd/m2 and maximum current efficiency 3.6 cd/A. We believe that our low-cost and efficient devices would be suitable for semitransparent display technologies. [Display omitted] •Carbon material as electrode can solve the problem of device stability in the single layer perovskite light-emitting devices.•Acid treatment of multiwall carbon nanotubes improve of their electrical properties.•Multiwall carbon nanotubes can use as a semitransparent electrode.