四苯基卟啉钯(II)/9,10-二苯基蒽弱光上转换体系的介质效应

Medium effect on low power upconversion system of Pd(Ⅱ)tetraphenylporphyrin and 9,10-Diphenylanthracence

三重态-三重态湮灭(TTA)上转换具有泵浦能量低、上转换效率高、吸光能力强、激发波长可调等优点,在光电器件与光反应等领域具有潜在应用价值。系统研究了四苯基卟啉钯(II)(Pd TPP)/9,10-二苯基蒽(DPA)在不同的溶剂中的上转换性能,研究结果表明溶剂极性越低越有利于三线态-三线态湮灭上转换。

The triplet-triplet annihilation upconversion （TTA-UC） can be carried out by the excitation as low asless than 100 MW/cm2, which shows many advantages such as the strong ability of absorption, high upconversionefficiency, tunable wavelength and so on, which can help the realization of some practical approaches for thesolar utility, including the solar cell, photovohaics and so on. This paper studies the upconversion of Pd （Ⅱ）tetraphenylporphyrin （PdTPP） and 9,10-Diphenylanthracence （DPA） in different solvents. The result shows thatthe low solvent polarity medium is especially beneficial to the upconversion of the triplet probability of thesensitizer （PdTPP） including the triplet irradiation and triplet excited lifetime.