期刊
APPLIED PHYSICS LETTERS
卷 82, 期 7, 页码 1060-1062出版社
AMER INST PHYSICS
DOI: 10.1063/1.1555267
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Crown-ether cyanide treatment, which simply involves immersion in KCN solutions containing 18-crown-6 followed by rinse, is studied in relation to electrical and optical properties of nitrogen-doped, polycrystalline Cu2O thin films, and its effect is compared with that of hydrogen treatment. By the crown-ether cyanide treatment, the luminescence intensity due to the near-band-edge emission of Cu2O at around 680 nm is enhanced, and the hole density is increased from the order of 10(16) to 10(17) cm(-3), analogous to hydrogen treatment. The effects of the passivation by the hydrogen treatment completely disappear after annealing at 350 degreesC, while those of the crown-ether cyanide treatment stay unchanged after the same annealing treatment. From these results, the crown-ether cyanide treatment for polycrystalline Cu2O thin films can be concluded to be a more suitable method of passivating defects than the hydrogen treatment. (C) 2003 American Institute of Physics.
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