Based on the solid-state reaction process, ZnO phosphors with different sintering temperatures were prepared, and wLED devices were prepared by combining near-ultraviolet LED chips. The photochromatic properties of the sample materials and devices were studied by X-ray diffraction, scanning electron microscopy, excitation and emission spectroscopy, spectrometer and other testing methods. The research results show that the spectral intensity of ZnO increases first and then decreases with the increase of sintering temperature and has an optimal value at 960° C; the corresponding excitation and emission spectral peaks are 380 nm and 501 nm，respectively. XRD and SEM show that the sample material has good crystallization properties.Under the condition of ZnO doping, the spectrum of the prepared wLED device is continuously improved. Under the condition of 4334 K the color rendering index reaches 95.7, an increase of 11.02%; the luminous flux and light extraction efficiency are 20.6 lm and 103 lm/W, respectively, decreased by 3.3%. This is because the emission spectrum distribution of ZnO deviates from the human visual efficiency curve, resulting in a slight decrease in the numerical value when calculating luminous flux.

ZnO  /  luminescent material  /  near ultraviolet LED  /  color rendering index  /  color temperature  /  luminous flux