Chemical Bath Deposition as a Simple Way to Grow Isolated and Coalesced ZnO Nanorods for Light-Emitting Diodes Fabrication

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A way to grow and characterize isolated and coalesced ZnO nanorods on p-GaN/sapphire structure is presented. Chemical bath deposition can be used to grow ZnO nanorods of device-quality, simply controlling the duration time of the growth process and the concentration of the nutrient solution in the bath. Increasing the duration of the process, as well as the concentration of the solution, leads to compact and sound layers instead of separated nanorods. However, too high concentrations stop the growth process. Light-emitting diodes fabricated on these ZnO-p-GaN heterostructure have a peak of electroluminescence at 400 nm and exhibit interesting electrical and optical properties. Optical power of 225 μW at 0.425 A/cm2and a related wall-plug efficiency of 0.23% are obtained with 2 mm-diameter LEDs fabricated on a ZnO layer grown for 30 h in a solution of concentration 70 mM. The performances shown by these LEDs can be used as a way to test the quality of the ZnO growth.
Lingua originaleEnglish
Numero di pagine6
Stato di pubblicazionePublished - 2018


All Science Journal Classification (ASJC) codes

  • Artificial Intelligence
  • Computer Networks and Communications
  • Computer Science Applications
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Industrial and Manufacturing Engineering
  • Instrumentation

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