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Inorganic ion treatment for Cd‐free colloidal quantum dot (QD) layers improved their carrier injection efficiency, resulting in improved external quantum efficiency (EQE) and electroluminescence (EL) lifetime of the QD light‐emitting diode (QD‐LED). Inorganic ion treated QD layers patterned at 176 ppi by photolithography enabled emission of each primary color.
Iron pyrite, FeS2 is a semiconductor that has attention as next generation material for solar cells. We reported the evaluation of band structure and the conductivity of FeS2 thin film toward a realization of FeS2 heterojunction solar cells. FeS2 thin film was prepared by spin-coating. The pyridine solution which included Iron(III) acetylacetonate was utilized as a precursor ink and the precursor...
We investigated the impact of atomization treatment by Femto-second laser to improve the luminance properties of distributed-type ZnS inorganic EL devices. The luminance intensity of EL devices with the phosphor irradiated for the some conditions has become five times higher than that with the original phosphor.
Semiconductor nanoparticles whose sizes were below 10 nm were fabricated by electro-spray deposition (ESD) method for a simple and dry printing process. We evaluated the particle size relation with the spray conditions. We found that the ZnS particle sizes were related with the solution flow rate. Calculated particle diameter from semi-theoretical analysis corresponded well with the experimental results...
We investigated a quick patterning using gel-nanoimprint process for zinc oxide (ZnO) thin films. The X-ray diffraction measurement revealed that the ZnO films had wurtzite structure by annealing in the ambient air or oxygen. The ZnO film annealed in oxygen exhibited higher refractive index of 1.92 (at 720 nm for wavelength of light) which is close to that of a conventional ZnO film, whereas that...
We investigated a quick patterning using a gel-nanoimprint process for zinc oxide (ZnO) thin films. The X-ray diffraction measurement revealed that the ZnO thin films had wurtzite structure by annealing in the ambient air or oxygen. The ZnO thin film annealed in oxygen exhibited higher refractive index of 1.92 (at 720 nm for wavelength of light) which is close to that of a conventional ZnO thin film,...
ZnS semiconductor nanoparticles were fabricated using electro spray process. We chose the electro spray deposition (ESD) method which is one of a particle preparation process from spray pyrolysis route. The ESD method, which produces nano-size droplets, combined with the evaporation of solvent of nano droplets can fabricate nanoparticle whose size are controlled to single nano order size and behave...
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