Metallic nanowire (MNW) based transparent electrodes (TE) have attracted recently a great interest since they represent a cheaper and versatile alternative to conventional oxide TE. MNW based TE appear to exhibit very good optical and electrical properties, very good bendability and a low price compared to transparent conductive oxides. Moreover MNW networks are compatible with solution processes and can be fabricated at low temperature, and without vacuum. MEANING project is based on a thorough collaboration between chemists and physicists in laboratories working on MNWs and an industrial partner developing organic solar cells with the aim of very large production (ARMOR). The main goals of MEANING are: i/ MNW growth and up-scaling, ii/ optimization of MNW networks, iii/ enhancement of the stability of MNW networks based TE and iv/ efficient integration of this type of TE into organic solar cells. To reach such goals a consortium with very complementary expertises is gathered including for instance growth of metallic nanostructures, physics of MNW networks, modeling of their physical properties and engineering for an efficient integration in industrial organic solar cells.
The growth of silver nanowires and copper nanowires, as well as other metallic nanostructures will be studied and also the upscaling process compatible with large mass markets. The optimization of their properties will be thoroughly investigated by varying several parameters including the deposition method or the post-deposition treatment. To address stability issues, MNW based nano-composites (with polymers, carbonaceous materials or oxides) will be fabricated and thoroughly investigated. The two academic partners have already shown that such nanocomposites can lead to a clear stability enhancement. The mechanisms at the origin of their degradation are being explored thanks to methods such as infra-red imagery and one point electrical mapping; the first results show that the failure is associated to the formation of and propagation of a crack observed during voltage ramps. Very clear and sound assets do exist concerning this innovative TE (efficient optical and electrical properties) as well the potentiality of the chosen type of solar cells does exist. The results of the project MEANING will allow a better integration into industrial devices thanks to original MNW growth, networks optimization (through experiments and modeling) and efficient MNW coating for a good stabilization and integration. Impacts in other industrial markets for which TE play a key role (LEDs, OLEDs, touch screens, transparent heaters, smart windows…) will also be impacted by MEANING project.
Monsieur Daniel BELLET (Institut Polytechnique de Grenoble)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
ICMCB INSTITUT DE CHIMIE DE LA MATIERE CONDENSEE DE BORDEAUX
GrenobleINP/LMGP Institut Polytechnique de Grenoble
Help of the ANR 393,453 euros
Beginning and duration of the scientific project: December 2018 - 42 Months