Author/Authors :
Yan، Wenbo نويسنده , , Kong، Yongfa نويسنده , , Shi، Lihong نويسنده , , Liu، Lei Sun, Hongde نويسنده , , Li، Xiaochun نويسنده , , Zhao، Di نويسنده , , Xu، Jingjun نويسنده , , Chen، Shaolin نويسنده , , Zhang، Ling نويسنده , , Huang، Ziheng نويسنده , , Liu، Shiguo نويسنده , , Zhang، Guangyin نويسنده ,
Abstract :
The influence of composition on the photorefractive effect in pure LiNbO3 crystals at low light intensity was investigated. The experimental results indicate that different defects dominate the photorefractive centers of pure LiNbO3 with various compositions. Bipolarons are considered to be responsible for the enhanced photovoltaic field in reduced near-stoichiometric LiNbO3, and their bulk photovoltaic constant (kappa) is estimated to be ~6.95×10^-32 m^3/V. Q polarons (composed of two bipolarons) are introduced to explain the photorefractive effect of congruent LiNbO3 at both low and high light intensities.
Keywords :
Sulphur dioxide , atmospheric VOC , isoprene , isoprene oxidation , inhibition of S(IV) autoxidation
