中文摘要
目前商業化的有機電激發光二極體元件中，以磷光材料來製作元件會有較高的效能表現，但其中藍色磷光材料由於受限壽命較短的關係，使得商業化的有機電激發光二極體元件大部分還是使用有較長壽命的藍色螢光材料，不過螢光元件較低的量子轉換率依舊是其重大的瓶頸。在此，我們合成出以順式二苯乙烯/芴螺旋體混成系統為核心架構，並在C3與C7位置上引入相同取代的拉電子官能基，期望能夠製作出具有三重態-三重態淬熄效應的藍色螢光元件，藉此使外部量子產率突破理論值5%，其中在元件結構為ITO/mCP : 4% ReO3 (60 nm)/mCP (20 nm)/PhCN (50 nm)/Liq/Al時，最大外部量子效率為5.1 % ; 最大發光效率為6.1 cd/A ; 最大功率效率為4.4 lm/W，最大發光亮度可達32,300 cd/m2，CIE(x, y)座落於(0.14, 0.15)，為一標準藍色螢光元件，另外在元件結構為ITO/PEDOT : PSS (35 nm)/SimCP2 + 1 wt% PhCN (20 nm)/TPBI (35 nm)/LiF (1 nm)/Al (150 nm)時， 最大外部量子產率為5.8 % ; 最大發光效率為4.4 cd/A ; 最大功率效率為 3.1 lm/W，最大發光亮度可達1,270 cd/m2，CIE(x, y)座標座落於(0.15, 0.10)，為一深藍色螢光元件，雖然以上兩元件並沒有三重態-三重態淬熄之效應，但還算是有不錯表現的藍色螢光元件。

此外，我們也嘗試以具有拉電子官能基的材料作為電子傳輸層的應用，其中在綠色磷光元件結構為ITO/HAT-CN (10 nm)/HT-01 + 3% F4 TCNQ (150 nm)/NPB (20 nm)/TPBI + 5% Ir(ppy)3 (30 nm)/BIMS (30 nm)/LiF (0.8 nm)/Al (120 nm)時，亮度為1,000 cd/m2條件下，BIMS元件的外部量子效率為10.7 % ; 發光效率為36.2 cd/A ; 功率效率為20.9 lm/W，半衰壽命可長達130小時，而最大亮度為23,588 cd/m2，可說是具有不錯的元件效能表現。另外在綠色磷光元件結構為ITO/HAT-CN (6 nm)/TAPC (30 nm)/[WPH401/WPH501 (5/4) + 10 wt% Ir(ppy)3 (15 nm)/PhCN (40 nm)/LiF (1 nm)/Al (100 nm)時，相對於BmPyPB元件，在亮度為1,000 cd/m2條件下，PhCN元件的外部量子效率增加了9.9 %; 發光效率增加了9.5 %; 功率效率則大幅增加了93.4 %，具有非常良好的元件效能表現。
而具有咪唑官能基團的BIMS，由於結構上類似廣泛使用的主體TPBI，因此也嘗試做為主體的應用，其中在紅色磷光元件結構為ITO/mCP : 4% ReO3 (60 nm)/mCP (20 nm)/BIMS : 10% OS1 (20 nm)/
BIMS (50 nm)/Liq/Al時，元件的最大外部量子效率為9.4 % ; 最大發光效率為8.7 cd/A ; 最大功率效率為9.9 lm/W，最大發光亮度可達20,778 cd/m2，CIE(x, y)座標座落於(0.66, 0.34)。
另外，我們也成功合成出新穎的紅色磷光材料Ir(SQ)2(acac)，並成功地應用在濕式磷光元件上，在元件結構為ITO/PEDOT : PSS (35 nm)/GK-60 (10 nm)/CBP + 2 wt% Ir(SQ)2(acac) (15 nm)/TPBI (32 nm)/LiF(1 nm)/Al (100 nm)時，且亮度為100 cd/m2條件下，元件的外部量子效率為8.5 % ; 發光效率為0.68 cd/A ; 功率效率為0.36 lm/W，CIE(x, y)座標座落於(0.61, 0.23)，最大亮度為688 cd/m2，算是具有不錯效能表現的標準紅光磷光元件。

Abstract
In current commercial OLED devices, the devices made of phosphorescent materials exhibit higher efficiency than fluorescent devices. However, most of the commercial blue OLED devices adopt fluorescent materials because of the less life time of the blue phosphorescent OLED devices. Although blue fluorescent OLED devices can maintain long life time, the low fluorescent quantum yield is still its serious disadvantage. So, here we synthesize cis stilbene/fluorene hybrid system for our template, and then connect same electron-withdrawing functional group at C3 and C7 positions, expecting for making high efficiency blue fluorescent OLED devices which can exceed theoretical EQE (5%) by TTA effect. In ITO/mCP : 4% ReO3 (60 nm)/mCP (20 nm)/PhCN (50 nm)/Liq/Al configuration, this OLED device exhibits maximum external quantum efficiency (EQE) of 5.1% ; maximum current efficiency (CE) of 6.1 cd/A ; maximum power efficiency (PE) of 4.4 lm/W; maximum luminance of 32,300 cd/m2. Its CIE(x, y) locates at (0.14, 0.15), and we can call it as pure blue OLED device. For another ITO/PEDOT : PSS (35 nm)/SimCP2 + 1 wt% PhCN (20 nm)/TPBI (35 nm)/LiF (1 nm)/Al (150 nm) configuration, this OLED device exhibits maximum EQE of 5.8 % ; maximum CE of 4.4 cd/A ; maximum PE of 3.1 lm/W ; maximum luminance of 1,270 cd/m2. Its CIE(x, y) locates at (0.15, 0.10), and we can call it as deep blue OLED device. Although the above two blue OLED devices do not show TTA effect, they still are not bad blue OLED devices.

What’s more, we also apply our electron-withdrawing compound to electron transport layer (ETL). In ITO/HAT-CN (10 nm)/HT-01 + 3% F4 TCNQ (150 nm)/NPB (20 nm)/TPBI + 5% Ir(ppy)3 (30 nm)/BIMS (30 nm)/LiF (0.8 nm)/Al (120 nm) configuration, this De facto standard device exhibits EQE of 10.7 % ; CE of 36.2 cd/A ; PE of 20.9 lm/W, and its half-life time can reach 130 hours on condition of luminance of 1,000 cd/m2. So, BIMS is capable of good electron transport ability in this green phosphorescent OLED device. For another green phosphorescent device, ITO/HAT-CN (6 nm)/TAPC (30 nm)/[WPH401/WPH501 (5/4) + 10 wt% Ir(ppy)3 (15 nm)/PhCN (40 nm)/LiF (1 nm)/Al (100 nm), this device has increased by 9.9 % of EQE, 9.5 % of CE, and specially 93.4% of PE compared to BmPyPB device on condition of luminance of 1,000 cd/m2. Thus, PhCN has great electron transport ability in this green phosphorescent device.
In addition, Because the structure of BIMS looks like TPBI, which is commercial host material, we also apply BIMS to host. For the red phosphorescent device, ITO/mCP : 4% ReO3 (60 nm)/mCP (20 nm)/BIMS : 10% OS1 (20 nm)/BIMS (50 nm)/Liq/Al, this device exhibits maximum EQE of 9.4 % ; maximum CE of 8.7 cd/A ; maximum PE of 9.9 lm/W; maximum luminance of 20,778 cd/m2, and its CIE(x, y) locates at (0.66, 0.34). However, BIMS shows terrible host ability for the green and yellow phosphorescent device.
Furthermore, we also successfully synthesize novel red phosphorescent material called Ir(SQ)2(acac), and apply Ir(SQ)2(acac) to wet-processed OLED device. For configuration, ITO/PEDOT : PSS (35 nm)/GK-60 (10 nm)/CBP + 2 wt% Ir(SQ)2(acac) (15 nm)/TPBI (32 nm)/LiF (1 nm)/Al (100 nm), this device shows EQE of 8.5 % ; CE of 0.68 cd/A ; PE of 0.36 lm/W on condition of luminance of 100 cd/m2, and its CIE(x, y) locate at (0.61, 0.23). It seems good and standard red phosphorescent device.

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