Abstract
Single crystals of metal-free phthalocyanine (H2Pc) and of copper phthalocyanine (CuPc) were grown in the presence of iodine vapour. The presence of iodine enhances the spectral dependence of photoconductivity of H2Pc in the visible region but of CuPc in the near-IR region. The dark current is decreased but the photocurrent is increased by one order of magnitude in iodine-doped H2Pc but in the case of iodine-doped CuPc both currents are increased by nearly three orders of magnitude. Introduction of iodine results in about one order of magnitude decrease in response time for both modifications. Thus the introduction of iodine into Pc crystals decreases the energy barrier for conduction and increases the drift mobility of charge carriers thereby enhancing the conductivity of the material.
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References
Barbaszweski Tet al 1986Phys. Status Solidi a94 419
Grigoryan L Set al 1984Phys. Status Solidi a84 597 — Grigoryanet al found no marked difference in the case of iodine doped CuPc crystals (iodine was doped by diffusion)
Harikumar P Set al 1989J. Mater. Sci. Letts. 8 969
Hoffman B Met al 1983Acc. Chem. Res. 16 15
Inokuchi H 1989Mol. Cryst. Liq. Cryst. 171 23
Orihashi Yet al 1988Mol. Cryst. Liq. Cryst. 160 139
Schramm C Jet al 1980J. Am. Chem. Soc. 102 6702
Waclawek Wet al 1987Thin Solid Films 146 1 — Waclaweket al reported seven to nine orders of magnitude increase in photocurrent for PbPc (iodine was doped by diffusion)
Zabkowska-Waclawek Met al 1987Mater. Sci. 13 315
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Xavier, F.P., Goldsmith, G.J. Photoconductivity of iodine-doped single crystals of phthalocyanine. Bull. Mater. Sci. 18, 283–287 (1995). https://doi.org/10.1007/BF02749667
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DOI: https://doi.org/10.1007/BF02749667