Tunable deep-level emission in ZnO nanoparticles via yttrium doping

Studies on Characterization, Optical Absorption, and Photoluminescence of Yttrium Doped ZnS Nanoparticles

“…And in addition orange-yellow emission has been observed, which indicates the incorporation of Y 3+ ions. Also, the literature reveals that Y-doped ZnO exhibits an emission at 598 nm due to defects related to Y elements [38]. According to these studies a part of Y 3+ ions will occupy the Zn position to lower the Zn concentration which decreases the intensity of emission peak at 539 nm.…”

“…Recent studies on Y ions incorporated into wide band gap semiconductor like ZnO [13,14] which resulted in significant increase in the optical properties, photocatalyst efficiency with improved stability of ZnO nanoparticles. Yttrium doping has also resulted in the deep-level emission with strong enhancement in the UV emission intensity, which prompts the application of ZnO nanoparticles in full-color displays and photoelectric nanodevices [15]. Yttrium doping also tunes the emission wavelength of ZnO and makes a supersensitive UV detector [16].…”

Effects of curing temperature on physical properties of hydrothermally-grown yttrium-doped ZnO nanorods

“…3, main features of 3d 3/2 and 3d 5/2 occur at 158 eV. According to the literature [20], the observed 3d 3/2 and 3d 5/2 peaks are attributed to the substitutional Y ions with the 3þ valence state in ZnO. Thus, the result infers Y dopants to substitute as Y 3þ ions at Zn sites.…”

Stable co-emission of UV, green and red light in ZnO thin films with rapid annealing treatment

“…From the reported results, it can be seen that the strong co-emission of green and red light is indeed rarely to be observed, which seems to support the above opinions on the green and red emission mechanisms. However, some groups recently reported the strong co-emission of green and red light in ZnO materials [8,19,20]. For example, Yang et al [20] prepared ZnO nanocrystals by sol-gel method and found that the samples had a strong co-emission of green and red light.…”

“…However, some groups recently reported the strong co-emission of green and red light in ZnO materials [8,19,20]. For example, Yang et al [20] prepared ZnO nanocrystals by sol-gel method and found that the samples had a strong co-emission of green and red light. The strong co-emission of green and red light or green/red emissions with different wavelengths at the same time suggests that it should have more than one source producing green and red emissions.…”