為研究物理系統(量子點，共軛高分子等)之時間解析光激輝光反應，因此我們研製時間相關單光子計數系統(Time Correlated Single Photon Counting System)，並應用於共軛高分子材料中之載子的傳輸，電子電洞的復合，遷移率變化等等的物理機制的研究。我們使用此系統來量測不同比例的Iridium複合物(Btp)2Ir摻雜到共軛高分子材料PFO中的發光行為，我們發現在摻雜較高濃度的(Btp)2Ir時，有較多能量傳輸到(Btp)2Ir的三重態能帶發出磷光，因此量測出來的生命期相對較大，相反的當濃度較小時，因(Btp)2Ir發出磷光較弱，量到的是PFO的螢光，因此量測出來生命期有變短的趨勢，此外我們發現此系統以5%濃度的樣品做溫度上相對於生命期的量測，得到的結果是溫度和生命期無關，這方面和本實驗使用頻率的方法來量測所得到的結果有所不同，需於日後再做一些確定。

To study the time-resolved photo luminescence of the physical systems like quantum dots and conjugated polymers, we set up the system of time correlated single photon counting, it is applied to study the carrier transport, electron-hole recombination and mobility in conjugated polymer related systems. We use the system to measure the emission mechanism of conjugated polymer material, PFO, doped with different concentration of Iridium complex, (Btp)2Ir. We find that the higher concentration of Iridium complex is, the stronger phosphorescence intensity is observed. As a result, there is longer triplet emission lifetime. Therefore, we reason that there is more energy transferring to Iridium. On the contrary, when we decrease the concentration of Iridium complex, phosphorescence intensity get weak such that the fluorescence of PFO dominated the emission. Consequently, we get the shorter triplet emission lifetime. In addition, we use the system to measure 5% Iridium complex doped PFO to investigate the relation between lifetime and temperature, and find that the lifetime is independent of temperature .This result is not consistent with other measurements by frequency-dependent methods taken in our laboratory. Further investigation is needed to resolve the discrepancy.

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