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Electrochemistry of the Fourteen Novel Electroluminescence Materials for Organic LEDs

Author: ZhaoGuoXin
Tutor: YeBaoXian
School: Zhengzhou University
Course: Analytical Chemistry
Keywords: Oxadiazole Phenothiazine Electrochemical Level track
CLC: O621.23
Type: Master's thesis
Year: 2007
Downloads: 258
Quote: 0
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Abstract


Since 1987, Eastman Kodak Company C. W. Been the Tang and Vanslyke reported first OLED, OLED has been widely used in electronic and optoelectronics commercial products. Is well known, the electronic structure of the light emitting material is an important characteristic of the OLED device. For example, determined by the highest occupied molecular orbital and the lowest unoccupied molecular orbital energy difference of the size to match the size of the work function of the respective electrodes. Provides a basis for our estimation π-conjugated electronic structure of the molecule in the measurement of the electrochemical redox reaction. However, for the OLED research on electrochemical reported not too much. For this reason, it is necessary to conduct in-depth study of the electrochemical properties and kinetic parameters of the OLED. In this paper, the following aspects of the work. 1. Detailed examination of the six kinds of the oxadiazole derivatives ultraviolet - visible absorption spectra and electrochemical properties. Electrochemical reaction mechanism and electrochemical parameters were discussed in detail and calculations. By UV - visible absorption spectrum from the peak wavelength λ onset corresponding energy values ??to determine the level track (Eg) size, and the highest occupied molecular orbital (HOMO) and lowest unoccupied common measured the size of the energy of the molecular orbital (LUMO) by cyclic voltammetry and UV - visible absorption spectroscopy. 2. DMF non-aqueous 0.1M TBAP as the supporting electrolyte, cyclic voltammetry and differential pulse method and a detailed study of the electrochemical properties of two thiophene-containing triazine groups conductive conjugated polymers in a glassy carbon electrode. The results show that: due to suction the introduction of the electron withdrawing group-CN, m-Polymer appears an obvious oxidation peak (1.084V) and reduction peak (-1.546V) Ph-Polymer appeared groups obvious oxidation (0.852 V and 1.155V) reduction of (-1.682V and-2.044V) peak. We detailed derivation of the electrochemical reaction mechanism. In addition, the use of cyclic voltammetry and UV - visible spectroscopy we also track level of these two polymers was estimated. 3. Detailed electrochemical studies we carried out a series of six phenothiazine polymer electrochemical parameters are calculated using a variety of methods, and the reaction mechanism in order to derive, and simultaneously estimate the size of the value of its level track . In addition, the paper also studied after the action of the the Ⅱ B metal ion with the conductive polymer cyclic voltammetry phenomenon results found that the polymer oxidation peak Ⅱ B metal ions is introduced so that a different degree of negative shift. Does not contain a free electron pair of the N atom of the polymer PQ and PQDB incorporated Zn 2 or of Hg of 2 ion after its peak potential move does not contain the polymerization of the N atom material PQDN, PQTN, PQS, and PQSe mobile. In addition, Zn 2 introduction led to The peak potentials mobile than Hg 2 introduced.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Properties of organic compounds > Electromagnetic properties
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