ITO-free organic solar cells with oxide/metal/oxide multilayer structure cathode

作者：Qian, Rui; Liao, Junchen; Luo, Guoping^*; Wu, Hongbin^*

来源：Organic Electronics: physics, materials, applications , 2022, 108: 106614.

DOI：10.1016/j.orgel.2022.106614

• Small molecule-based organic solar cells
• ITO-Free transparent conductive electrode
• Gallium-doped zinc oxide
• Oxide/metal/oxide (O/M/O) multilayer film
• Optical and electric properties

High-performance gallium-doped zinc oxide (GZO)/Ag/GZO multilayer structured transparent conductive electrodes were deposited on glass substrates by magnetron sputtering technique through optimizing oxygen flow, thickness of GZO and thermal annealing treatment. In a comparative study of optical and electric properties with the most commonly used indium tin oxide (ITO)electrode, the resultant GZO/Ag/GZO electrodes show lower sheet resistance of 10.66 Omega sq(-1), higher average visible transmittance of 90.04% and superior figure of merit (FoM) of 328 Omega(-1). When used as ITO-free transparent conductive electrode (TCE) for both classical fullerene and non-fullerene organic solar cells, comparable device performance or even better than that of those fabricated from ITO electrode is obtained. Given its low-cost, large-scale production accessibility, the GZO/Ag/GZO based electrode could be a good candidate for application in a wide range of organic electronics.

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