TY - JOUR
T1 - Luminescent platinum(II) complexes of 1,3-bis(N-alkylbenzimidazol- 2′-yl)benzene-type ligands with potential applications in efficient organic light-emitting diodes
AU - Lam, Elizabeth Suk Hang
AU - Tsang, Daniel Ping Kuen
AU - Lam, Wai Han
AU - Tam, Anthony Yiu Yan
AU - Chan, Mei Yee
AU - Wong, Wing Tak
AU - Yam, Vivian Wing Wah
PY - 2013/5/10
Y1 - 2013/5/10
N2 - A series of luminescent platinum(II) complexes of tridentate 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene (bzimb) ligands has been synthesized and characterized. One of these platinum(II) complexes has been structurally characterized by X-ray crystallography. Their electrochemical, electronic absorption, and luminescence properties have been investigated. Computational studies have been performed on this class of complexes to elucidate the origin of their photophysical properties. Some of these complexes have been utilized in the fabrication of organic light-emitting diodes (OLEDs) by using either vapor deposition or spin-coating techniques. Chloroplatinum(II)-bzimb complexes that are functionalized at the 5-position of the aryl ring, [Pt(R-bzimb)Cl], not only show tunable emission color but also exhibit high current and external quantum efficiencies in OLEDs. Concentration-dependent dual-emissive behavior was observed in multilayer OLEDs upon the incorporation of pyrenyl ligand into the Pt(bzimb) system. Devices doped with low concentrations of the complexes gave rise to white-light emission, thereby representing a unique class of small-molecule, platinum(II)-based white OLEDs.
AB - A series of luminescent platinum(II) complexes of tridentate 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene (bzimb) ligands has been synthesized and characterized. One of these platinum(II) complexes has been structurally characterized by X-ray crystallography. Their electrochemical, electronic absorption, and luminescence properties have been investigated. Computational studies have been performed on this class of complexes to elucidate the origin of their photophysical properties. Some of these complexes have been utilized in the fabrication of organic light-emitting diodes (OLEDs) by using either vapor deposition or spin-coating techniques. Chloroplatinum(II)-bzimb complexes that are functionalized at the 5-position of the aryl ring, [Pt(R-bzimb)Cl], not only show tunable emission color but also exhibit high current and external quantum efficiencies in OLEDs. Concentration-dependent dual-emissive behavior was observed in multilayer OLEDs upon the incorporation of pyrenyl ligand into the Pt(bzimb) system. Devices doped with low concentrations of the complexes gave rise to white-light emission, thereby representing a unique class of small-molecule, platinum(II)-based white OLEDs.
KW - cyclometalation
KW - density functional calculations
KW - luminescence
KW - organic light-emitting diodes
KW - platinum
UR - http://www.scopus.com/inward/record.url?scp=84877256281&partnerID=8YFLogxK
U2 - 10.1002/chem.201203290
DO - 10.1002/chem.201203290
M3 - Journal article
VL - 19
SP - 6385
EP - 6397
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 20
ER -