Relationship between structure and optoelectrical properties of organic-inorganic hybrid materials containing fullerene derivatives

Novel lead iodide-based layered perovskite compounds, which contain fullerene derivatives, N-methyl-2-(4-ammoniumphenyl)-fulleropyrrolidine iodide (AmPF) and N-(n-dodecyl)-2-(4-ammoniumphenyl)fulleropyrrolidine iodide (C12AmPF), in their organic layers were fabricated as thin solid films by spin-coating. The XRD profiles showed that (AmPF)Pbl(4) molecules were arranged in a closer-packing form, compared with (C12AmPF)Pbl(4). The photoluminescence spectra of thin films suggested the presence of energy transfer between C-60 moiety and lead(II) iodide layers, which led to the disappearance of fluorescence peak at 517 nm and the appearance of a new fluorescence peak at 780 nm.(AmPF)Pbl(4) and (C12AmPF)Pbl(4) films exhibited photoconductivity when ultraviolet light was irradiated, and the photocurrent values with applying 1.0 V bias voltage were 1.77 mu A and 1.48 x 10(-2) mu A, respectively. (C) 2009 Elsevier B.V. All rights reserved.