Ti3C2Tx/PEDOT:PSS Composite Interface Enables over 17% Efficiency Non-fullerene Organic Solar Cells

Metal carbide Ti3C2Tx as a new two-dimensional material with excellent metallic conductivity, good water solubility, and superior transmittance in the visible light range shows great potential for applications in optoelectronic devices. Herein, Ti3C2Tx/PEDOT:PSS composite films were fabricated by a simple solution process and employed as an anode interfacial layer in organic solar cells. By introducing the Ti3C2Tx/PEDOT:PSS composite interface into the devices, the highest power conversion efficiency (PCE) of 17.26% was achieved while using PM6:Y6 as the active layer, with a high short-circuit current (J(sc)) of 26.52 mA/cm(2) and a fill factor of up to 0.76. The PCE is much higher than 15.89% for the pure PEDOT:PSS interfacial layer-based device without doping. The dramatically improved performance was attributed to the increased conductivity of the Ti3C2Tx/PEDOT:PSS composite interface and the increased charge extraction and collection efficiency of the devices. This work presents an effective method to prepare the Ti3C2Tx/PEDOT:PSS composite interface and high-performance organic solar cells.

Automated summary

The study fabricated Ti3C2Tx/PEDOT:PSS composite films by a simple solution process and utilized them as an anode interfacial layer in organic solar cells, achieving a high power conversion efficiency of 17.26%. The composite interface improved the conductivity and charge extraction efficiency of the devices, providing an effective method for high-performance organic solar cells.