研究生: |
陳映豪 Ying-Hao Chen |
---|---|
論文名稱: |
高效率錯體有機發光二極體元件: 元件特性與操作壽命之探討 Highly efficient exciplex organic light-emitting devices: The investigation of the device performance and operational lifetime |
指導教授: |
李志堅
Chih-Chien Lee |
口試委員: |
李志堅
Chih-Chien Lee 范慶麟 Ching-Lin Fan 王煥宗 Huan-Chun Wang 劉舜維 Shun-Wei Liu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 光電工程研究所 Graduate Institute of Electro-Optical Engineering |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 66 |
中文關鍵詞: | 有機發光二極體 、激發錯合體 、熱活化延遲螢光 、反向系統間跨越 、元件壽命 |
外文關鍵詞: | OLED, Exciplex, TADF, RISC, Lifetime |
相關次數: | 點閱:241 下載:8 |
分享至: |
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在本論文以carbazole結構之電子傳輸材料4,4’,4”-Tris(carbazol- 9-yl)triphe-
nylamine ( TCTA )作為電子受體,以及以triazine結構之電洞傳輸材料2,4,6-tris(3-
(1H-pyrazol-1-yl)phenyl)-1,3,5-triazine( 3P-T2T )作為電子施體,以共蒸鍍的方式混和兩種材料,使得在介面上產生高效率的激發錯合體形成,並從PL光譜證明激發錯合體的產生。
接著在透過結構上的調變,分析結構對其效率之影響,並使載子達到平衡得到最佳的元件效率,而綜合了結構調變的實驗結果,最佳化元件在無摻雜材料下得到了10%外部量子效率,而摻雜入8%綠色磷光材料Ir(ppy)2(acac)則得到了29.6%的外部量子效率,以及在2000nits下T75得到了1400 min的高元件壽命。
最後本論文從薄膜與材料端進行分析,證明了膜層的不穩定性與材料存在載子陷阱將影響元件的壽命。
In this thesis, we use carbazole structure of 4,4’,4”-Tris(carbazol- 9-yl)triphe-
nylamine ( TCTA ) as electron acceptor and triazine structure of the hole transport material 2,4,6-tris(3-(1H-pyrazol-1-yl)phenyl)-1,3,5-triazine( 3P-T2T ) as electronic donor. The two materials were mixed in a co-vapor deposition way to produce highly efficient excitation complexes on the interface, and the exciplex generation was proved by PL spectrum.
We analyze the effect on the efficiency by changing the structure of the device to achieve the best efficiency with charge balance. The result of optimized device shows 10% and 29.6% external quantum efficiency with and without green phosphorescence material Ir(ppy)2(acac) and lifetime of ~1400 minutes with initial brightness of 2000 cd/m2.
In conclusion, the analysis of films and materials show that the instability of the film and the existence of carrier traps will lead to the life of the devices
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