CAJ | 학술논문

针对新型芴类小分子材料6,6'-(9H-fluoren-9,9-diyl)bis(2,3-bis(9,9-dihexyl-9H-fluoren-2-yl) quinoxaline) (BFLBBFLYQ)和卒穴传输材料N,N'-biphenyl-N,N'-bis-(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD)及二者混合体系的荧光光谱和吸收光谱进行了测试表征,制备了结构为indium-tin oxide (ITO)/BFLBBFLYQ:TPD/Alq/Mg:Ag的双层有机电致发光器件.研究发现,BFLBBFLYQ:TPD混合薄膜存在一个不同于单独分子薄膜的低能量发射光潜,发光峰在530 nm处,与tris(8-hydroxyquinolinato)aluminum(Alq)薄膜的荧光光谱相同,亦与结构为BFLBBFLYQ:TPD/Alq双层器件的电致发光光谱相同.鉴于荧光染料4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB)的吸收光谱与Alq的荧光光谱有很好的重叠,利用Forster能量传递理论,将DCJTB红色染料引入双层器件,通过调节掺杂位置,考察器件的发光光谱情况,进而对BFLBBFLYQ:TPD/Alq双层器件的载流子复合区域进行了研究.结果表明,双层器件的载流子复合区域位于BFLBBFLYQ:TPD/Alq界面附近的Alq层内.
침대신형물류소분자재료6,6'-(9H-fluoren-9,9-diyl)bis(2,3-bis(9,9-dihexyl-9H-fluoren-2-yl) quinoxaline) (BFLBBFLYQ)화졸혈전수재료N,N'-biphenyl-N,N'-bis-(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD)급이자혼합체계적형광광보화흡수광보진행료측시표정,제비료결구위indium-tin oxide (ITO)/BFLBBFLYQ:TPD/Alq/Mg:Ag적쌍층유궤전치발광기건.연구발현,BFLBBFLYQ:TPD혼합박막존재일개불동우단독분자박막적저능량발사광잠,발광봉재530 nm처,여tris(8-hydroxyquinolinato)aluminum(Alq)박막적형광광보상동,역여결구위BFLBBFLYQ:TPD/Alq쌍층기건적전치발광광보상동.감우형광염료4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB)적흡수광보여Alq적형광광보유흔호적중첩,이용Forster능량전체이론,장DCJTB홍색염료인입쌍층기건,통과조절참잡위치,고찰기건적발광광보정황,진이대BFLBBFLYQ:TPD/Alq쌍층기건적재류자복합구역진행료연구.결과표명,쌍층기건적재류자복합구역위우BFLBBFLYQ:TPD/Alq계면부근적Alq층내.
Double-layer organic light-emitting devices (OLEDs) based on a blend system of novel small molecule fluorene material 6,6'-(9H-fluoren-9,9-diyl) bis(2,3-bis(9,9-dihexyl-9 H-fluoren-2-yl) quinoxaline) (BFLBBFLYQ) and hole transporting material N,N'-biphenyl-N,N'-bis-(3-methylphenyl)-1,1'-biphenyb4,4'-diamine (TPD) were fabricated.The structure of the double-layer device was ITO/BFLBBFLYQ:TPD/tris(8-hydroxyquinolinato) aluminum(Alq)/Mg:Ag.The photoluminescence (PL) spectra of BFLBBFLYQ and TPD were located at 447 and 414 nm,respectively.The spectral characteristics of the blend system and the double-layer device were investigated,which indicated that a new long wavelength emission peaking at 530 nm was appeared both in PL spectra and electrolumineseence (EL) spectra.The exciplex between BFLBBFLYQ and TPD may play the role in long wavelength emission in the blend device and the spin-coated film.Based on the absorption spectra of a red fluorescent dye 4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4 H-pyran (DCJTB) as probe and the PL spectra of the blend system showing good overlap,energy transfer from the blend system to DCJTB could be expected.Therefore,DCJTB could be selected as a molecular dopant to investigate the influence on EL spectra and the recombination of the devices.It was found that the excitons recombine at the interior Alq layer near to the BFLBBFLYQ:TPD layer.