Charge Carrier Generation Mechanism for Titanyl Phthalocyanine by the Analysis of Time-resolved Fluorescence Emission

通过时间分辨荧光发射分析钛氧基酞菁的载流子产生机制

• 批准号: 04650006
• 负责人: KITAMURA Takashi
• 金额: $ 1.28万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650006/
• 关键词: Fluorescence Spectrum; Time-resolved Fluorescence; Titanyl Phthalocyanine; X-Type Metal-free Phthalocyanine; Charge Carrier Generation; X線無金属フタロシアニン

Time-resolved fluorescence spectra and lifetimes of phthalocyanine pigments were measured by using the single photon counting technique. The single photon counting system were consisting of dye laser, photomultiplier, monochrometer, signal processor and personal computer system. alpha-, x-type Metal-free phthalocyanine pigments, alpha-, beta-, epsilon-type copper-phthalocyanine pigments and alpha-type titanyl phthalocyanine pigment dispersed in a binder polymer were coated on the glass substrate. Copper phthalocyanine pigments were used after purification process by the train sublimation technique.The fluorescence spectra for the samples exposed to He-Ne laser light were obtained by this system. Phthalocyanine pigments emitted fluorescence in the near infrared wavelength range from 800nm to 900nm. The intensity of fluorescence for x-type metal-free phthalocyanine pigment was larger than that of other pigments. The relation between the intensity of fluorescence and photocarrier generation efficiency was not obtained from this experimental results.The transient of fluorescence emission for x-type metal-free phthalocyanine pigment was measured by using the singly photon counting technique. The life time of fluorescence for the sample exposed to 610nm wavelength of dye laser light was about 2 mu seconds. This life time is larger than that of phthalocyanine molecules dissolved in the organic solution. It is considered that this life time of fluorescence corresponds to the diffusion of exciton in phthalocyanine pigment.

用单光子计数技术测量了酞菁染料的时间分辨荧光光谱和寿命。单光子计数系统由染料激光器、光电倍增管、单色器、信号处理器和微机系统组成。将分散在粘合剂聚合物中的α-、X-型无金属酞菁颜料、α-、β-、ε-型铜酞菁颜料和α-型钛氧基酞菁颜料涂布在玻璃基材上。采用升华法提纯铜酞菁颜料，用该系统测量了样品在He-Ne激光照射下的荧光光谱。酞菁类色素在800 ~ 900 nm的近红外波长范围内发射荧光。x型无金属酞菁颜料的荧光强度比其它颜料的荧光强度大。用单光子计数技术测量了x型无金属酞菁颜料的荧光发射瞬态过程。在波长为610 nm的染料激光照射下，样品的荧光寿命约为2 μ s。该寿命大于溶解在有机溶液中的酞菁分子的寿命。认为这种荧光寿命与酞菁颜料中激子的扩散有关。