ICCAS OpenIR
ac impedance characteristics and modeling of polymer solution light-emitting devices
Chang, SC; Yang, Y; Wudl, F; He, GF; Li, YF
2001-11-22
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1089-5647
Volume105Issue:46Pages:11419-11423
AbstractRecently, we demonstrated polymer solution light-emitting devices (SLEDs) using polymeric solutions as the light-emitting medium. The operating mechanism of the SLED was proven to be electrogenerated chemiluminescence (ECL). In this manuscript, we report the results obtained from ac impedence studies on the SLED. Based on the results, the SLED can be modeled as a combination of device capacitance (C-1), solution layer resistance (R-1), interfacial capacitance (C-2), and interfacial resistance (R-2). It was found that the impedance characteristics of the SLED are a strong function of the bias voltage. At low bias voltages, the impedance plots exhibited semicircular and linear characteristics in the high- and low-frequency range, respectively. With increase in the bias voltage, C-2 decreased, implying an ECL mechanism for the SLED. Finally, an interesting behavior was observed when the SLED was biased at 8 V. The impedance spectrum was similar to that of the solid-state polymer light-emitting electrochemical cell (LEC), suggesting some similarities in the device operating mechanism between the SLED and LEC.
Indexed BySCI
Language英语
WOS IDWOS:000172466100008
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/76684
Collection中国科学院化学研究所
Corresponding AuthorYang, Y
Affiliation1.Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
2.Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
3.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Chang, SC,Yang, Y,Wudl, F,et al. ac impedance characteristics and modeling of polymer solution light-emitting devices[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2001,105(46):11419-11423.
APA Chang, SC,Yang, Y,Wudl, F,He, GF,&Li, YF.(2001).ac impedance characteristics and modeling of polymer solution light-emitting devices.JOURNAL OF PHYSICAL CHEMISTRY B,105(46),11419-11423.
MLA Chang, SC,et al."ac impedance characteristics and modeling of polymer solution light-emitting devices".JOURNAL OF PHYSICAL CHEMISTRY B 105.46(2001):11419-11423.
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