在本論文中，我們以 benzimidazole 的配位基的銥金屬化合物，並利用此化 合物分別合成了兩個系列的樹枝狀磷光材料以及高分子磷光材料。而這些材料皆 可使用液態製程（旋轉塗佈法）製作有機發光元件。
我們所合成的樹枝狀磷光分子大多放出綠色磷光。因為有樹枝狀的構型，可 以避免其分子之間的堆疊，因此在液態或固態多有不錯的磷光量子產率。其樹枝 狀由 benzyl ether 所構成，使其分子對一般有機溶劑都有很好的溶解度，並且有 良好的成膜性質。兩個系列的銥金屬樹枝狀材料加上電子傳導層 TPBI，皆可製 作高效率的 OLED 元件－其最大量子效率可達 13％以上。雖然這系列的化合物，
我們可以得到相當高效率的元件，但我們觀察到，當其樹枝狀分子代數增加時，
會有類似絕緣的性質出現，造成電流密度偏低，同時亦發現其電洞傳遞速率也隨 著代數增加而降低。因此，未來在分子的設計上，對樹枝狀分子而言，我們希望 樹枝狀的外端或樹枝狀本身即擁有可傳導電子或電洞的官能機，這樣便可以增加 樹枝狀分子的載子傳導能力。若電子與電洞對能在元件內達到平衡，製作單層的 樹枝狀元件也是一個可以努力的目標。
對我們所合成的高分子材料而言，兩個系列同樣的可以利用 Suzuki-coupling reaction 合成高分子化合物。兩個系列的高分子皆有一些共通點，例如：相較於 固態膜，高分子在溶液中，含銥金屬的高分子的分子間與分子內的能量轉移都是 很差的；兩個系列的高分子其固態時三重態能階最高都約 2.30 eV 上下，若三重 態能階太低，往往造成能量回傳；在元件效率上皆以摻混系統的 EL 效率佳。顯 然的，這兩個高分子系列的元件效率都不算太高。我們推測，三重態能量轉移以 及三重態能量回傳階對元件的效率皆有重大的影響。因此，往後我們對高分子的 設計，必須避免能量的回傳，並且需要使其擁有更高的三重態能階。經 SCLC 測 量電子與電洞的傳遞速率，發現銥金屬若共價鍵結於主鏈，則其載子速率皆會下
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