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ZnO thin films were deposited on polyethersurfone (PES) substrates by atomic layer deposition (ALD). We investigated the effects of O2 plasma pretreatment from 0 W to 100 W before the ZnO growth. When the plasma power was increased, the PET substrate surface roughness was also increased. However, the surface roughness of ZnO on the roughest PET substrate with maximum plasma power pretreatment showed...
In this study, the effects of precursor concentration on the zinc oxide (ZnO) nanorods grown on flexible polyethylen terephthalate (PET) substrate with and without buffer layer were discussed. The concentration was varied from 0.05 to 0.5M. When we inserted buffer layer before hydrothermally growth of ZnO, better aligned ZnO nanorods were grown. At relatively middle concentration (from 0.2 to 0.3M),...
To realize the theoretical advantages of Quantum Dots (QDs) as the active region for diode lasers, the selective growth of QDs on patterned substrates were investigated. The substrate nanopatterning and QD formation was realized by diblock copolymers combined with selective MOCVD growth. Using a CF4 reactive ion etch (RIE) and a sacrificial SiNx mask, diblock copolymer nanopattern was transferred...
InGaAsN/GaAsSb dasiaWpsila type-II strain compensated quantum well lasers on GaAs substrates are grown by MOCVD. Preliminary lasers with 3-stage active regions exhibit emission that is blue-shifted from the PL, due to charge separation and higher-energy transitions.
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