Organic light-emitting devices based on 4,4'-bis(2,2'-diphenyl vinyl)-1,1'-biphenyl as a spacer between dual ultrathin layers
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摘要
White organic light-emitting devices(WOLEDs) were fabricated by using a highly blue fluorescent dye of 4,4'-bis(2,2'-diphenyl vinyl)-1,1'-biphenyl(DPVBi) and a red fluorescent dye of 5H-benzo[ij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile(DCM2), together with a green fluorescent dye of 10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1 H,5 H,11 H-(1)-benzopyroyran-o(6,7-8-i,j) quinolizin-11-one(C545 T).The multilayer WOLEDs does not involve the doping process.The structure of the device is indium tin oxide(ITO)/4,4',4''-tris{N,-(3-methylphenyl)-N-phenylamin}triphenylamine(m-MTDATA)(55 nm)/N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biph-enyl-4,4'-diamine(NPB)(10 nm)/DPVBi(8 nm)/C545 T(x nm)/DPVBi(5 nm)/DCM2(y nm)/tris-(8-hydroxyquinoline) aluminum(Alq3)(60 nm)/LiF(1 nm)/Al, where the DPVBi is introduced as a spacer.By changing the thicknesses of dual ultrathin layers of C545 T and DCM2, the WOLED is obtained.When x=y=0.05, the Commission Internationale de 1'Eclairage(CIE) coordinates of the device change from(0.262 6, 0.351 4) at 4 V to(0.214 7, 0.269 3) at 12 V that are well in the white region.Its maximum luminance is 41400 cd/m~2 at 13 V, and the maximum current efficiency and the maximum power efficiency are 7.95 cd/A at 6 V and 5.37 lm/W at 5 V, respectively.
White organic light-emitting devices(WOLEDs) were fabricated by using a highly blue fluorescent dye of 4,4'-bis(2,2'-diphenyl vinyl)-1,1'-biphenyl(DPVBi) and a red fluorescent dye of 5H-benzo[ij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile(DCM2), together with a green fluorescent dye of 10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1 H,5 H,11 H-(1)-benzopyroyran-o(6,7-8-i,j) quinolizin-11-one(C545 T).The multilayer WOLEDs does not involve the doping process.The structure of the device is indium tin oxide(ITO)/4,4',4''-tris{N,-(3-methylphenyl)-N-phenylamin}triphenylamine(m-MTDATA)(55 nm)/N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biph-enyl-4,4'-diamine(NPB)(10 nm)/DPVBi(8 nm)/C545 T(x nm)/DPVBi(5 nm)/DCM2(y nm)/tris-(8-hydroxyquinoline) aluminum(Alq3)(60 nm)/LiF(1 nm)/Al, where the DPVBi is introduced as a spacer.By changing the thicknesses of dual ultrathin layers of C545 T and DCM2, the WOLED is obtained.When x=y=0.05, the Commission Internationale de 1'Eclairage(CIE) coordinates of the device change from(0.262 6, 0.351 4) at 4 V to(0.214 7, 0.269 3) at 12 V that are well in the white region.Its maximum luminance is 41400 cd/m~2 at 13 V, and the maximum current efficiency and the maximum power efficiency are 7.95 cd/A at 6 V and 5.37 lm/W at 5 V, respectively.
White organic light-emitting devices(WOLEDs) were fabricated by using a highly blue fluorescent dye of 4,4'-bis(2,2'-diphenyl vinyl)-1,1'-biphenyl(DPVBi) and a red fluorescent dye of 5H-benzo[ij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile(DCM2), together with a green fluorescent dye of 10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1 H,5 H,11 H-(1)-benzopyroyran-o(6,7-8-i,j) quinolizin-11-one(C545 T).The multilayer WOLEDs does not involve the doping process.The structure of the device is indium tin oxide(ITO)/4,4',4''-tris{N,-(3-methylphenyl)-N-phenylamin}triphenylamine(m-MTDATA)(55 nm)/N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biph-enyl-4,4'-diamine(NPB)(10 nm)/DPVBi(8 nm)/C545 T(x nm)/DPVBi(5 nm)/DCM2(y nm)/tris-(8-hydroxyquinoline) aluminum(Alq3)(60 nm)/LiF(1 nm)/Al, where the DPVBi is introduced as a spacer.By changing the thicknesses of dual ultrathin layers of C545 T and DCM2, the WOLED is obtained.When x=y=0.05, the Commission Internationale de 1'Eclairage(CIE) coordinates of the device change from(0.262 6, 0.351 4) at 4 V to(0.214 7, 0.269 3) at 12 V that are well in the white region.Its maximum luminance is 41400 cd/m~2 at 13 V, and the maximum current efficiency and the maximum power efficiency are 7.95 cd/A at 6 V and 5.37 lm/W at 5 V, respectively.
引文
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[3]J.Kido,M.Kimura and K.Nagai,Science 267,1332(1995).
[4]B.W.D’Andrade,R.J.Holmes and S.R.Forrest,Adv.Mater.16,624(2004).
[5]C.H.Chuen,Y.T.Tao,F.I.Wu and C.F.Shu,Appl.Phys.Lett.85,4609(2004).
[6]C.W.Ko and Y.T.Tao,Appl.Phys.Lett.79,4234(2004).
[7]T.Tsuji,S.Naka,H.Okada and H.Onnagawa,Appl.Phys.Lett.81,3329(2002).
[8]C.Adachi,M.A.Baldo,S.R.Forrest,S.Lamansky,M.E.Thompson and R.C.Wong,Appl.Phys.Lett.78,1622(2001).
[9]Chang-Bum Moon,Wook Song,Mei Meng,Nam Ho Kim,Ju-An Yoon,Woo Young Kim,Richard Wood and Peter Mascher,J.Lumin.146,314(2014).
[10]Yu-Seok Seo and Dae-Gyu Moon,Current Applied Physics 14,1188(2014).
[11]Xie Wen-fa,Zhao Yi,Li Chuan-nan and Liu Shi-yong,Semicond.Sci.Technol.20,L57(2005).
[12]Yang Hui-shan,Zhao Yi,Hou Jing-ying and Liu Shi-yong,Displays 27,183(2006).
[13]Xie Wen-fa,Wu Zhi-jun,Liu Shi-yong and Lee Shuit-tong,J.Phys.D:Appl.Phys.36,2331(2003).
[14]Zhao Juan,Yu Jun-sheng,Wang Xiao and Zhang Lei,Solid-State Electronics 81,63(2013).
[15]Yang Hui-shan,J.Lumin.142,231(2013).