Electroluminescence Character of Novel Unsymmetry Substituted Phthalocyanines
XIA Dao-cheng1, 3, LI Wan-cheng2*, HAN Shuang1, CHENG Chuan-hui4, LI Quan-quan1，WANG Jin1, ZHANG Wei1, LI Zhu1
1. College of Chemistry, Yuncheng University, Yuncheng 044000, China 2. State Key Laboratory of Integrated Optoelectronics, Jilin University, Changchun 130021, China 3. College of Chemistry, Northeast Normal University, Changchun 130021, China 4. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023, China
Abstract：The authors for the first time fabricated OLEDs employing novel phthalocynines: 2(3)-(p-tert-butylphenoxy) copper phthalocyanine(1), 2(3),16(17)-di(p-tert-butyl-phenoxy) copper phthalocyanine(2)and 2(3), 9(10), 16(17)-tri (p-tert-butylphenoxy) copper phthalocyanine(3) as light emitting layer, and their electroluminescence character was studied. The final structures of three-layer OLEDs based on copper 2(3)-(p-tert-butylphenoxy) copper phthalocyanine (1)and 2(3), 9(10), 16(17)-tri (p-tert-butylphenoxy) copper phthalocyanine(3)were ITO/NPB(40 nm)/Pc(30 nm)/AlQ(43.5 nm)/LiF (0.5 nm)/Al(120 nm). The structure of three-layer OLED based on 2(3), 9(10), 16(17)-tri (p-tert-butylphenoxy) copper phthalocyanine (3) was ITO/NPB(30 nm)/Pc(30 nm) /BCP(20 nm)/AlQ(30 nm)/LiF (0.5 nm)/Al(120 nm). Room-temperature electroluminescence was observed at about 869 nmand 1 062 nm for 2(3)-( p-tert-butylphenoxy) copper phthalocyanine(1);room-temperature electroluminescence of 2(3),16(17) -di(p-tert-butyl-phenoxy) copper phthalocyanine(2) was found at about 1 050 nm and 1 110 nm; and Room-temperature electroluminescence of 2(3), 9(10), 16(17)-tri (p-tert-butylphenoxy) copper phthalocyanine(3) was studied at about 1 095 and 1 204 nm . The emission wavelengths and the half bandwidths were quite different for the phthalocyanine, which may be due to the differences in the number of substituted and the molecular aggregations in vacuum sublimed films. The difference in Stokes shift relaxation was also induced by the molecular aggregations.
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