Strong violet luminescence from ZnO nanocrystals grown by the low-temperature chemical solution deposition

Multicolor Luminescence from Semiconductor Nanocrystal Composites Tunable in an Electric Field

“…The UV emission from nanocrystals is ascribed to near-band-edge luminescence of ZnO. The variation of the UV peak energy as a function of temperature described by the Varshni equation also confirms this statement (Kurbanov et al, 2009b). Because the ZnO nanocrystals were prepared without intentional doping, the violet, green and yellow-orange emissions are attributed to native defect centers and their complexes.…”

“…Normalized (a) CL and (b) PL spectra of ZnO nanoparticles: (black) as-prepared and (red) after annealing in air at 500 o C for 1h. (Kurbanov et al, 2009b) Figs. 2.3 (a) and (b) show the normalized room temperature CL and PL spectra of the ZnO nanoparticles before and after annealing in air at 500 o C for 1h, respectively.…”

Resonant Raman scattering of ZnS, ZnO, and ZnS/ZnO core/shell quantum dots

“…Therefore the knowledge of the phonon spectra of nanomaterials is of a great importance. Several experimental techniques including methods of the wet chemistry [3][4][5] or combination of evaporation techniques with wet chemistry [6], colloidal chemistry [7][8][9], preparation of QDs in polymer matrices [10], sputtering techniques [11,12], and sol-gel methods [13] are known to be used for the formation of ZnS and ZnO QDs. Among those the Langmuir-Blodgett (LB) technique is considered as a versatile, relatively simple, fast, and low-cost method for QD fabrication of II-VI and IV-VI materials with controllable QD areal density on different substrates [14][15][16][17][18].…”

Влияние пространственной ориентации наностержней ZnO на спектр люминесценции

“…Как было отмечено во введении, фиолетовая ПЛ в районе 400 nm приписывается вакансиям цинка [5][6][7][8] и наблюдается в структурах ZnO, выращенных в условиях с избытком кислорода, независимо от способов синтеза. При гидротермальном методе синтеза реакция протека-ет в водной среде с избытком кислорода, что способ-ствует образованию вакансий цинка.…”

“…В частности, фио-летовая полоса люминесценции (ПЛ) в районе 400 nm приписывается вакансиям цинка [5][6][7][8], голубая ПЛ в районе 420−460 nm -межузельному цинку [9], зеле-ная ПЛ -кислородной вакансии [10,11] и вакансии цинка [12], а желто-оранжевая ПЛ -межузельному кислороду (O i ) [13][14][15].…”