Fabrication of transparent p-n hetero-junction diodes by p-diamond film and n-ZnO film

ZnO/diamond hetero-junction diodes have been fabricated for the first time. The structure of the diode was n-type ZnO film/p-type diamond film on the {1111} surface of a crystalline diamond. The contact between the n- and p-type semiconductors was found to be improved. The ratio of forward current to the reverse current exceeded 120 within the range of applied voltages of -4 to +4 V. The diode possessed an optical transmission of 50-70% in 500-700 nm wavelength regions. (C) 2003 Elsevier Science B.V. All rights reserved.