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RESEARCH PRODUCT
Chemical Bath Deposition as a Simple Way to Grow Isolated and Coalesced ZnO Nanorods for Light-Emitting Diodes Fabrication
Roberto MacalusoD. C. RussottoIsodiana CrupiMauro MoscaGiuseppe LulloEric FeltinC. GiaconiaSalvatore Mirabellasubject
ZnO nanorodMaterials scienceFabricationRenewable Energy Sustainability and the Environmentbusiness.industryEnergy Engineering and Power TechnologyZnO-p-GaN heterojunction-based LEDComputer Science Applications1707 Computer Vision and Pattern RecognitionHeterojunctionElectroluminescenceSettore ING-INF/01 - ElettronicaIndustrial and Manufacturing Engineeringlaw.inventionchemical bath depositionComputer Networks and CommunicationArtificial IntelligencelawSapphireOptoelectronicsNanorodbusinessInstrumentationLayer (electronics)Chemical bath depositionLight-emitting diodedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-09-01 | 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) |