物理学报2012，Vol.61Issue(9)：51-57,7.
5（6）羧基荧光素敏化TiO2纳米粒子的光致电子转移的荧光特性研究
Research of fluorescent properties of photo-induced electron transfer of 5（6）-carboxyfluorescein dye-sensitized TiO_2 nanoparticles
摘要
Abstract
Anatased TiO2 nanoparticles were prepared by controlling hydrolysis of the TiCl4.Time-resolved fluorescence experiments were carried out to study the photo-induced electron transfer dynamics in the system of the 5（6）CFL dye-sensitized TiO2 nanoparticles.For the aboved system,the formation of the charge transfer complex is attributed to the coupling interaction between the wave functions of the excited electronic state of the dye（Ψ（D~＊）） and the charge separated state（Ψ（D~＋＋e~-））.On excitation of 5（6）CFL dyesensitized TiO2 nanoparticle system.The injection of electrons into the conduction band of TiO2 nanoparticles takes place in two different ways：through the excited state of the 5（6）CFL dye and through direct injection from the charge transfer complex.The time-resolved fluorescence experimental results indicate that the free 5（6）CFL dye in water has double-exponential decay with lifetimesτ1 41 ps（74.4%） andτ2= 3.22 ns（25.6%）.However,5（6）CFL dye-sensitized TiO2 nanoparticles have triple-exponential decay with lifetimes ofτ1= 44 ps（90.4%）,τ2= 478 ps（8.6%） andτ3= 2.41 ns（1.0%）.Our research will provide a valuable reference for the mechanism of dye-sensitized solar cell.关键词
时间分辨荧光光谱/5（6）CFL染料/光致电子转移/电荷转移复合物Key words
time-resolved fluorescence/photo-induced electron transfer/5(6)CFL dye/charge transfer complex分类
化学化工引用本文复制引用
蒋礼林,宋云飞,刘伟龙,于国洋,何兴,王阳,吴红琳,杨延强..5（6）羧基荧光素敏化TiO2纳米粒子的光致电子转移的荧光特性研究[J].物理学报,2012,61(9):51-57,7.基金项目
国家自然科学基金（批准号：20973050）资助的课题 （）
