本論文主要研究工作為探討有機高分子發光二極體的自旋極化注入效應，我們可藉由磁電導的量測以及理論模型的假設，間接地觀察到電洞受到鐵磁陽極的極化注入現象。首先，在實驗上，使用一常用的有機高分子綠光材料PFO(polyfluorene)作為發光主動層，並以PEDOT:PSS和鈣(Ca)分別作為電洞的陽極注入和電子的陰極注入，觀察其標準綠光元件在偏壓下的基本電場特性，並根據磁場量測的基本特性去探討其磁場效應的貢獻來源，加以綜合了解載子、激發子在主動層內部的傳輸行為、作用…等等。然而，另一方面我們則使用一鐵磁材料的鎳鐵合金(Py)或鈷(Co)來取代非鐵磁材料的PEDOT:PSS作為陽極，使得電洞能夠被有效地極化注入發光主動層中與載子、激發子、極化子對等等作用，量得其正磁電導效應的增加。因此，這些實驗結果將輔助我們在有機磁效應的模型機制解釋，間接印證了激發態機制的可能性。最後，相信本論文的工作對將來的研究有所幫助，並期盼自旋極化注入的研究未來能在實際運用上有莫大的貢獻。

In this thesis,the major job is to explore the effect of spin-polarized injection in polymer light emitting diode.We indirectly observe a hole spin-polarized injection from the ferromagnetic anode through the experimental measurement and the theoretical hypothesis.At first, in order to know what contribute the magnetic effect,we manufacture a common light-emitting diode device,using PFO (polyfluorene) material to be the active layer,PEDOT:PSS and Ca(cathcium) as the hole- and electron- injecting layer,respectively. Furthermore,from the electric and magnetic measurement,we can get some information that those particles and excitons how to transport in the materials or interact with each other.However,by an another way we replace the PEDOT:PSS with permallory or cobalt to polarize the hole’s spin and then inject to the lighting active layer to change the pairing mechanism,we will observe an enhanced magneto-response.Therefore, it is helpful to explain the mechanism of excited states from those experimental results.Finally,we believe this study is useful for the future work,and we expect the spin-polarizd research will be contributed to the practical application in future.

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