Interfacial Interaction Enables Enhanced Mobility in Hybrid Perovskite-Conjugated Polymer Transistors with High-k Fluorinated Polymer Dielectrics

The charge carrier mobility of organic field-effect transistors (OFETs) has been remarkably improved through several engineering approaches and techniques by targeting pivotal parts. Herein, an ultrathin perovskite channel layer that boosts the field-effect mobility of conjugated polymer OFETs by forming perovskite-conjugated polymer hybrid semiconducting channel is introduced. The optimized lead-iodide-based perovskite-conjugated polymer hybrid channel transistors show enhanced hole mobility of over 4 cm(2) V-1 s(-1) (average = 2.10 cm(2) V-1 s(-1)) with high reproducibility using a benchmark poly(3-hexylthiophene) (P3HT) polymer and employing high-k fluorinated polymer dielectrics. A significant hole carrier mobility enhancement of approximate to 200-400% in benzo[1,2-b:4,5:b ']dithiophene (BDT)-based conjugated polymers is also demonstrated by exploring certain interactive groups with perovskite. This significant enhancement in the transistor performance is attributed to the increased charge carrier density in the hybrid semiconducting channel and the perovskite-polymer interactions. The findings of this paper demonstrate an exceptional engineering approach for carrier mobility enhancement in hybrid perovskite-conjugated-polymer-based electronic devices.

Automated summary

The charge carrier mobility of organic field-effect transistors (OFETs) has been significantly improved through various engineering approaches and techniques targeting specific parts. This study introduces an ultrathin perovskite channel layer that enhances the field-effect mobility of conjugated polymer OFETs by creating a perovskite-conjugated polymer hybrid semiconducting channel. The optimized lead-iodide-based perovskite-conjugated polymer hybrid channel transistors exhibit enhanced hole mobility of over 4 cm(2) V-1 s(-1) (average = 2.10 cm(2) V-1 s(-1)), thanks to the interaction between the perovskite and the polymer. This research provides an exceptional engineering approach for improving carrier mobility in hybrid perovskite-conjugated-polymer-based electronic devices.