科研之友
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摘要
Self-supporting ZnO nanocone arrays (NCAs) were fabricated by a low temperature and substrate-free hydrothermal process in open air, and near white electroluminescence (EL) devices with a structure of n-ZnO NCAs/p-Si heterojunction were fabricated. Different EL performances were achieved by controlling the growth time of ZnO nanocone layer and the chromaticity coordinates of the obtained diodes are tunable and can be changed from (0.36, 0.41) to (0.29, 0.32), which is close to (0.33, 0.33) of standard white light. The mechanism of the EL emission phenomenon was discussed.
