以波长为780 nm、重复频率为76 MHz、脉宽为130 fs的飞秒激光作为激发光源,采用超快时间分辨光谱技术研究了Cd Te量子点-铜酞菁复合体系的荧光共振能量转移.实验结果表明,在780 nm的双光子激发条件下,复合体系中Cd Te量子点的荧光寿命随着铜酞菁溶液浓度的增加而减少,荧光共振能量转移效率增加.同时也研究了激发功率对荧光共振能量转移效率的影响.结果表明,随着激发光功率的增加,复合体系溶液中Cd Te量子点的荧光寿命增加,荧光共振能量转移效率减小,其物理机理是因为高激发功率下的热效应和由双光子诱导的高阶激发态的跃迁.当激发光功率为200 m W时,双光子荧光共振能量转移效率为43.8%.研究表明Cd Te量子点-铜酞菁复合体系是非常有潜力的第三代光敏剂. The fluorescence resonance energy transfer of CdTe quantum dot-copper phthalocyanine complex system was investigated by using ultrafast time-resolved spectroscopy with a femtosecond laser at a wavelength of 780 nm, a repetition frequency of 76 MHz and a pulse width of 130 fs as the excitation light source. The experimental results show that under the two-photon excitation condition of 780 nm, the fluorescence lifetime of CdTe quantum dots in the composite decreases with the concentration of copper phthalocyanine solution, and the fluorescence resonance energy transfer efficiency increases.At the same time, the excitation power pair Fluorescence resonance energy transfer efficiency.The results show that with the increase of the excitation power, the fluorescence lifetime of the CdTe quantum dots in the composite solution increases, and the fluorescence resonance energy transfer efficiency decreases. The physical mechanism is due to the high excitation power Thermal effect and high-order excited state transition induced by two-photon.The energy transfer efficiency of two-photon fluorescence resonance is 43.8% when the excitation light power is 200 m W. Studies have shown that the CdTe quantum dot-copper phthalocyanine composite system is very Third-generation potential photosensitizer.