Activation of upconversion emission in visible region and emission in infrared region in tri-codoped (Er³⁺, Tm³⁺ and Yb³⁺ rare earth ions) zirconium titanate nano composites has been attained by synthesizing through solution combustion method. ZrTi_1.4O₄, serves as host matrix which offers lowest phonon energy at 870 cm⁻¹. PL emission has been recorded by exciting the samples with wavelength of 980 nm in NIR region. X-Ray diffraction patterns confirm crystallinity of the composites. Morphological studies were performed by Field emission scanning electron microscopy. Primary colors, Blue (475 nm), green (520 nm, 530 nm, 540 nm and 550 nm) and red (650 nm and 670 nm) emissions in visible region along with IR emission peaks centered at 1531 nm, 1574 nm, 1646 nm, 1738 nm and 1793 nm were observed. Dominant red emission appearing in the PL spectra is regarded to be due to Multi phonon relaxation and cross relaxations.

采用溶液燃烧法合成了三共掺杂（Er ³⁺、Tm ³⁺和Yb ³⁺稀土离子）钛酸锆纳米复合材料的可见光区上转换发射和红外区发射活化。ZrTi _1.4 O ₄用作基质，在 870 cm ^-1处提供最低声子能量. 通过在 NIR 区域激发波长为 980 nm 的样品，记录了 PL 发射。X 射线衍射图证实了复合材料的结晶度。通过场发射扫描电子显微镜进行形态学研究。可见区域中的原色、蓝色（475 nm）、绿色（520 nm、530 nm、540 nm 和 550 nm）和红色（650 nm 和 670 nm）发射以及集中在 1531 nm、1574 nm、1646 的红外发射峰观察到 1738 nm 和 1793 nm。PL 光谱中出现的主要红色发射被认为是由于多声子弛豫和交叉弛豫。