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|標題:||New carbazole-substituted anthracene derivatives based non-dopedblue light-emitting devices with high brightness and efficiency|
|關鍵字:||Organic light-emitting diodesCarbazole groupAnthracene derivativeElectroluminescence properties|
|摘要:||A series of anthracene and 2-tert-butylesubstituted anthracene derivatives featuring 9-ethyl-9H-carbazol-3-yl or 4-(9-ethyl-9H-carbazol-3-yl)phenyl groups were synthesized for use as light-emitting layerin sky-blue organic light emitting devices (OLEDs). Efficient conjugation between the carbazole andanthracene unit resulted in strong blue emissions and high quantum efficiencies of anthracene derivativesin solution. Electroluminescence (EL) properties of non-doped OLEDs incorporated with theseanthracene derivatives, along with an electron-transporting layer (ETL), tri-(8-hydroxyquinoline)aluminum (Alq3) or 1,3,5-tris(N-phenyl benzimidizol-2-yl)benzene (TPBI) were investigated. The OLEDsincorporated with TPBI provided superior EL performance than did those incorporated with Alq3. A holeblockinglayer 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) was inserted at the interface of lightemitting layer and ETL to enhance the EL performance for the OLED with Alq3 as ETL. High brightness(37423 cd/m2), and great current efficiency (5.89 cd/A) were observed for the 4-(9-ethyl-9H-carbazol-3-yl)phenyl-substituted anthracene derivatives based OLEDs.|
|Appears in Collections:||化學工程學系所|
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