We report enhanced hole injection using an RuOx layer between indium tin oxide anodes and 4,4'-bis[N-(1-naphtyl)-N-phenyl-amino]biphenyl in organic light emitting diodes (OLEDs). The operation voltage of OLEDs at a current density of 100 mA/cm(2) decreased from 17 V to 14 V and the maximum luminance value increased from 1200 cd/m(2) to 2500 cd/m(2) upon transformation of the Ru layer to RuOx by surface treatment using O-2 plasma. Synchrotron radiation photoelectron spectroscopy results showed that the work function increased by 0.4 eV as the Ru layer was transformed to RuOx. Thus, the hole injection energy barrier was lowered, reducing the turn-on voltage and increasing the quantum efficiency of the OLEDs.
机构:
City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R ChinaCity Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Deng, ZB
;
Ding, XM
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Ding, XM
;
Lee, ST
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Lee, ST
;
Gambling, WA
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Liu, G
;
Kerr, JB
论文数: 0引用数: 0
h-index: 0
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Kerr, JB
;
Johnson, S
论文数: 0引用数: 0
h-index: 0
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
机构:
City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R ChinaCity Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Deng, ZB
;
Ding, XM
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Ding, XM
;
Lee, ST
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
Lee, ST
;
Gambling, WA
论文数: 0引用数: 0
h-index: 0
机构:City Univ Hong Kong, Ctr Super Diamond & Adv Films, Kowloon, Peoples R China
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Liu, G
;
Kerr, JB
论文数: 0引用数: 0
h-index: 0
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Kerr, JB
;
Johnson, S
论文数: 0引用数: 0
h-index: 0
机构:
Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USALawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA