An efficient pyridine- and oxadiazole-containing hole-blocking material far organic light-emitting diodes: Synthesis, crystal structure, and device performance

被引:157
作者
Wang, CS
Jung, GY
Hua, YL
Pearson, C
Bryce, MR
Petty, MC
Batsanov, AS
Goeta, AE
Howard, JAK
机构
[1] Univ Durham, Dept Chem, Sci Labs, Durham DH1 3LE, England
[2] Univ Durham, Sch Engn, Sci Labs, Durham DH1 3LE, England
[3] Tianjin Inst Technol, Inst Mat Phys, Tianjin 300191, Peoples R China
关键词
D O I
10.1021/cm0010250
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this paper, we focus on the synthesis and structure of the new bis(1,3,4-oxadiazole) system 2,5-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]pyridine (PDPyDP). We have fabricated light-emitting diodes (LEDs) using poly[2-methoxy-5-(2-ethylhexoxy)-1,4-phenylene vinylene] (MEH-PPV) as the emissive material, with and without a thermally evaporated electron-injection/hole-blocking layer of either PDPyDP or its vinylene analogue (E)-1,2-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]ethene (PDVDP) or its phenylene analogue 1,4-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl]benzene (PDPDP). PDPDP is the para isomer of OXD-7, which is a widely used molecular electron-transporting material. Electroluminescence spectra indicate that light is emitted only from the MEH-PPV layer. Using aluminum as the cathode, the bilayer LED with PDPyDP is considerably more efficient than the corresponding single-layer device or devices with PDVDP or PDPDP as the electron-injection layer.
引用
收藏
页码:1167 / 1173
页数:7
相关论文
共 46 条
[21]  
Kim HS, 1998, J IND ENG CHEM, V4, P324
[22]  
Kim HS, 1999, KOREA POLYM J, V7, P18
[23]   An alternating copolymer consisting of light emitting and electron transporting units [J].
Kim, JK ;
Yu, JW ;
Hong, JM ;
Cho, HN ;
Kim, DY ;
Kim, CY .
JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (09) :2171-2176
[24]  
Kraft A, 1998, ANGEW CHEM INT EDIT, V37, P402, DOI 10.1002/(SICI)1521-3773(19980302)37:4<402::AID-ANIE402>3.0.CO
[25]  
2-9
[26]  
Kuznetsov V. P., 1996, FUNCT MAT, V3, P460
[27]  
MEYER H, 1913, MONATSH CHEM, V34, P525
[28]   The electroluminescence of organic materials [J].
Mitschke, U ;
Bäuerle, P .
JOURNAL OF MATERIALS CHEMISTRY, 2000, 10 (07) :1471-1507
[29]  
Mitschke U, 1998, CHEM-EUR J, V4, P2211, DOI 10.1002/(SICI)1521-3765(19981102)4:11<2211::AID-CHEM2211>3.3.CO
[30]  
2-Z