Electronic and Optical Properties of Doped Titanium Dioxide

二氧化钛是一种应用广泛的白色颜料，由于其高折射率，仅次于钻石。长期暴露在阳光下观察到的金红石型颜料颗粒泛黄是颜料制造商想要解决的一个严重问题。认为掺铝金红石通过改变金红石颗粒的电子结构来限制金红石的变色。该项目旨在确定黄化过程的具体电子原因，铝缺陷的性质，它对金红石电子结构的影响，以及当使用其他掺杂时可能发生的电子扰动。

Titanium dioxide, is widely used as a white pigment, owing to its high refractive index, second, only after diamond. Yellowing of rutile pigment particles, observed on prolonged exposure to sunlight, is a serious problem that pigment manufacturers would like to overcome. It is proposed that aluminium-doping of rutile limits this discolouration by altering the electronic structure of the rutile particles. This project seeks to identify the specific electronic cause of the yellowing process, the nature of the Al defect,it's effect on the electronic structure of rutile, and the electronic perturbations that may occur when other dopants are used.