Figure 1

(a) XRD pattern of Y_1.94O₃: Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles. (b) SEM image of Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles. (c) The magnified view of SEM image nanorod bundles and inset exhibits the further magnified view of red marked region in (c). (d) TEM image of nanorod bundle taken from selected area. (e) TEM micrograph of individual nanorod and inset shows the HRTEM of nanorod. (f) PL emission spectrum of Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles at excitation wavelength of 980 nm and inset demonstrates CIE colour coordinates for green emission. (g) PL emission spectrum of Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles at excitation wavelength of 449 nm and inset demonstrates CIE colour coordinates of green emission. (h) PL excitation spectrum of Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles at emission wavelength of 549 nm. (i) TRPL decay profile of nanorod bundles recorded at room temperature while monitoring emission at 549 nm, at an excitation of 449 nm and inset shows the exponential fitting of the decay profile.