TY - JOUR
T1 - Organic light-emitting devices (OLED) based on new triphenylamine derivatives
AU - Xia, Chuanyang
AU - Wang, Xiaomei
AU - Lin, Jian
AU - Jiang, Wanli
AU - Ni, Yuan
AU - Huang, Wei
PY - 2009/2
Y1 - 2009/2
N2 - In this paper, we reported the synthesis of two new triphenylamine derivatives: 1,4-bis[-E-4-(N,N-diphenylamino)styryl]naphthalene (Np-G1) and 2,8-bis[-E-4-(N,N-diphenylamino) styryl]dibenzothiophene (ST-G1) and investigated the electroluminescence characteristics of the three-layer devices with Np-G1 or ST-G1 as emitting layer. The results have shown that introduction electron-acceptor group, naphthalene, into triphenylamine units, Np-G1 with linear geometric conformation can lower its LUMO level obviously and resulting facilitate electron injection and transport for the device. Thus, the three-layer device (ITO/TCTA/Np-G1/BCP /Mg:Ag) improved the electroluminescence properties the best, presenting the brightness of ∼10,000 cd/m2 and current efficiency of ∼3.0 cd/A. On the other hand, ST-G1 with V-shaped conformation containing dibenzothiophene linked triphenylamine groups cannot effectively decreased its LUMO level. As a result, ST-G1 has little contribution to the carrier recombination within itself.
AB - In this paper, we reported the synthesis of two new triphenylamine derivatives: 1,4-bis[-E-4-(N,N-diphenylamino)styryl]naphthalene (Np-G1) and 2,8-bis[-E-4-(N,N-diphenylamino) styryl]dibenzothiophene (ST-G1) and investigated the electroluminescence characteristics of the three-layer devices with Np-G1 or ST-G1 as emitting layer. The results have shown that introduction electron-acceptor group, naphthalene, into triphenylamine units, Np-G1 with linear geometric conformation can lower its LUMO level obviously and resulting facilitate electron injection and transport for the device. Thus, the three-layer device (ITO/TCTA/Np-G1/BCP /Mg:Ag) improved the electroluminescence properties the best, presenting the brightness of ∼10,000 cd/m2 and current efficiency of ∼3.0 cd/A. On the other hand, ST-G1 with V-shaped conformation containing dibenzothiophene linked triphenylamine groups cannot effectively decreased its LUMO level. As a result, ST-G1 has little contribution to the carrier recombination within itself.
KW - Dibenzothiophene
KW - Electrochemical behavior
KW - Electroluminescence
KW - Geometrical structure
KW - Naphthaline
KW - Triphenylamine
UR - http://www.scopus.com/inward/record.url?scp=60449093711&partnerID=8YFLogxK
U2 - 10.1016/j.synthmet.2008.08.014
DO - 10.1016/j.synthmet.2008.08.014
M3 - 文章
AN - SCOPUS:60449093711
SN - 0379-6779
VL - 159
SP - 194
EP - 200
JO - Synthetic Metals
JF - Synthetic Metals
IS - 3-4
ER -