Gas-phase deposition of di- and tetra-lithium salts of 2,5-dihydroxyterephthalic acid

Abstract

Thin films of two ambipolar lithium-organic electrode materials, Li₂DHTP and Li₄DHTP, are grown from gaseous precursors, Li(thd) (tetramethyl heptanedione) and DHTP (dihydroxyterephthalic acid). These precursors are pulsed into the reactor in a sequential manner like in atomic/molecular layer deposition, but the reaction product, i.e. the di- or the tetra-lithium salt, is controlled by adjusting the precursor pulse lengths.