Abstract

Vertically aligned Fe-doped ZnO nanorod arrays (ZnO:Fe NRAs) with weak ferromagnetism at room temperature (RT) have been fabricated by <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in situ</i> doping of Fe into ZnO nanorods (NRs) using a simple thermal chemical vapor deposition method. Structure analyses indicated that the NRs have a single-crystalline wurtzite structure without any detectable segregated cluster or impurity phase. Both photoluminescence and electroluminescence (EL) showed near-band-edge and broad defect-band emissions at RT. The EL from ZnO:Fe NRAs/p-Si light-emitting diodes red shifted with increasing current injections, which was ascribed to the doping effect of the Fe.

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