Title :
High efficiency double-layer white polymer light-emitting diode
Author :
Niu, Qiaoli ; Zhang, Yong ; Wang, Yongli ; Wang, Xin
Author_Institution :
Dept. of Educ. of Guangdong Province, South China Normal Univ., Guangzhou, China
Abstract :
In this presentation, efficient white polymer-light-emitting diodes have been fabricated with double emissive layers. The device structure consists of ITO/poly(ehtlenedioxythiophene): poly(styrene sulfonic acid) (PEDOT: PSS)/poly(N-vinylcarbazole) (PVK) /phenyl-substituted PPV derivative (P-PPV)/poly(9, 9-dioctylfluorene) (PFO)/Ba/Al. By tuning the thickness of the emissive layers, white light was obtained. In EL spectra of the white light, the full width at half maximum (FWHM ) of the green band from P-PPV increased from 79 nm to 110 nm. Therefore, the EL spectra can cover the whole visible area. The 1931 CIE coordinates of the white light emission obtained were (0.31, 0.36). The maximum luminous efficiency is 3.8cd/A.
Keywords :
electroluminescence; indium compounds; light emitting diodes; optical fabrication; optical films; optical polymers; optical tuning; visible spectra; ITO; PEDOT-PSS; double emissive layers; double-layer white polymer light-emitting diode; electroluminescence; full width at half maximum; optical fabrication; optical tuning; poly(9, 9-dioctylfluorene); poly(ehtlenedioxythiophene); poly(n-vinylcarbazole); poly(styrene sulfonic acid); visible spectra; Absorption; Color; Films; Flat panel displays; Organic light emitting diodes; Polymers; double-layer; light emitting diode; polymer; white;
Conference_Titel :
Advances in Optoelectronics and Micro/Nano-Optics (AOM), 2010 OSA-IEEE-COS
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-8393-8
Electronic_ISBN :
978-1-4244-8392-1
DOI :
10.1109/AOM.2010.5713548
