Abstract
Band edge and exciton energies in nanowires are affected by the reduced size. Using a combination of tight-binding and effective-potential methods we calculate the corrections in hexagonal ZnO nanowires. Both band edge and exciton binding energy follow an inverse power-law dependence on diameter. The exciton-phonon interaction is included and shown to have important consequences, especially for very small wires. The total shift comprised of both band gap and exciton corrections is in excellent agreement with experiments. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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