Organic-inorganic hybrid materials as semiconducting channels in thin- film field-effect transistors

Organic-inorganic hybrid materials promise both the superior carrier mobility of inorganic semiconductors and the processability of organic materials. A thin-film field-effect transistor having an organic-inorganic hybrid material as the semiconducting channel was demonstrated. Hybrids based on the perovskite structure crystallize from solution to form oriented molecular-scale composites of alternating organic and inorganic sheets. Spin- coated thin films of the semiconducting perovskite (C6H5C2H4NH3)2SnI4 form the conducting channel, with field-effect mobilities of 0.6 square centimeters per volt-second and current modulation greater than 104. Molecular engineering of the organic and inorganic components of the hybrids is expected to further improve device performance for low-cost thin-film transistors.