ИСТИНА

Graphene, graphene-like materials, and transition metal carbides (MXenes) have been used either as dopant for the charge transport layers (CTL) or as interlayers to tune the electronic properties of CTLs. We developed the conductive thin layers of the nanocomposites based on polyaniline-polyacid (PAni) complex doped with graphene (G) or graphene oxide (GO) nanoflakes. The transparency of ~80% in visible range make them promising for organic solar cells and similar electronic devices. Hole transport layer (HTL) based on G/PAni nanocomposite increased the short circuit current by 80% in comparison with reference G free and GO doped HTLs. The mechanism of the improvement is discussed in the report. In another work, doping of the PCBM electron transport layer (ETL) with Ti3C2Tx MXene permitted tuning the ETL work function, eventually proper energy level alignment at perovskite/CTL interfaces and an improvement of the charge transport properties in PCBM. The MXene-based PSCs showed performance with the 19.2% power conversion efficiency.