Primary Process of Photocarrier Generation in Y-Form Titanyl Phthalocyanine Studied by Electric-Field-Modulated Picosecond Time-Resolved Fluorescence Spectroscopy
Primary Process of Photocarrier Generation in Y-Form Titanyl Phthalocyanine Studied by Electric-Field-Modulated Picosecond Time-Resolved Fluorescence Spectroscopy
复制标题
电场调制皮秒时间分辨荧光光谱研究Y型钛氧基酞菁光载流子产生的主要过程
DOI：
10.1021/jp991892w
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发表时间：
1999
影响因子：
3.3
通讯作者：
Y. Sasaki
中科院分区：
文献类型：
--
作者：
S. Yamaguchi;Y. Sasaki
利用电场调制皮秒时间分辨荧光光谱技术研究了Y型酞菁氧钛（Y-TiOPc）微晶中载流子产生的主要过程.在Y-TiOPc的荧光衰减曲线中发现了两个单重态激子。我们已经推断，从场依赖性的荧光振幅和寿命的短寿命激子的分子内电荷转移（CT）字符是一个主要的中间体在载流子产生过程中。已经发现，从CT激子到Frenkel激子的内部转换被电场减速。
We have investigated the primary process of the carrier generation in Y-form titanyl phthalocyanine (Y-TiOPc) microcrystallites by means of newly developed electric-field-modulated picosecond time-resolved fluorescence spectroscopy. Two singlet excitons have been identified in the fluorescence decay curves of Y-TiOPc. We have inferred from the field-dependence of the fluorescence amplitudes and lifetimes that the shorter-lifetime exciton of intramolecular charge transfer (CT) character is a primary intermediate in the carrier generation process. It has been found that the internal conversion from the CT exciton to the Frenkel exciton is decelerated by the electric field.