Based on the Monte Carlo computer simulation method

regulation of the performance of light conversion film and pc-WLED with different doping concentrations of TiO

2

particles is studied.The research results show that the fluorescence emission intensity of the light conversion film first rise then descend with the increase of TiO

2

particles concentration

it has a high value when the concentration is 2.0 wt%;the Mie scattering Theory computer simulation shows that the free path of photon propagation decreases with the incr

ease of particle concentration

which is beneficial to the increase of the photon scattering coefficient and the excitation of blue excited photons. Further combining with the blue LED chip to realize the simulation of pc-WLED

the intensity of blue light in the spectral distribution curve decreases with the increase of TiO

2

particle concentration

and the intensity of yellow light fluorescence emission shows an increasing trend

all thanks to the particle scattering effect which improves probability of the excitation photon and fluorescence powder effect of particles; the corresponding device has the highest luminous flux of 415.8 lm at the concentration of 2.0 wt%

which is 14.83 % higher than that of undoped. The research shows that the scattering effect of TiO

2

particles can effectively modify the light and color properties of the light conversion film and pc-WLED

which has reference value for obtaining high efficiency

low cost and high uniformity of pc-WLED.