TY - JOUR
T1 - Green to white to blue OLEDs by using PBD as a chromaticity-tuning layer
AU - Wang, Yuanmin
AU - Teng, Feng
AU - Ma, Changqi
AU - Xu, Zheng
AU - Hou, Yanbing
AU - Yang, Shengyi
AU - Wang, Yongsheng
AU - Xu, Xurong
PY - 2004/12
Y1 - 2004/12
N2 - Blue to white to green light-emitting diodes with structure ITO/PVK:DPPhP(5%)/PBD(x nm)/Alq 3(5 nm)/LiF(0.3 nm)/Al have been obtained. DPPhP (1,3-diphenyl-5-(9-phenanthryl)-4,5-dihydro-1-H-pyrazole), which performs good blue-emitting and hole-transporting properties, is synthesized and used as dopant. When the thickness of PBD layer varies from 0 to 5 to 10 nm, green to white to blue emission is achieved. Based on the energy band theory and carries tunneling theory, we consider that PBD layer plays a chromaticity-tuning role and the color-variable EL is ascribe to its modulation function on carrier recombination zone.
AB - Blue to white to green light-emitting diodes with structure ITO/PVK:DPPhP(5%)/PBD(x nm)/Alq 3(5 nm)/LiF(0.3 nm)/Al have been obtained. DPPhP (1,3-diphenyl-5-(9-phenanthryl)-4,5-dihydro-1-H-pyrazole), which performs good blue-emitting and hole-transporting properties, is synthesized and used as dopant. When the thickness of PBD layer varies from 0 to 5 to 10 nm, green to white to blue emission is achieved. Based on the energy band theory and carries tunneling theory, we consider that PBD layer plays a chromaticity-tuning role and the color-variable EL is ascribe to its modulation function on carrier recombination zone.
KW - Green to white to blue
KW - OLEDs
KW - PBD as chromaticity-tuning layer
UR - http://www.scopus.com/inward/record.url?scp=11444270163&partnerID=8YFLogxK
U2 - 10.1016/j.displa.2004.09.016
DO - 10.1016/j.displa.2004.09.016
M3 - Article
AN - SCOPUS:11444270163
SN - 0141-9382
VL - 25
SP - 237
EP - 239
JO - Displays
JF - Displays
IS - 5
ER -