Method for treating surface of electrode, electrode, and process for producing organic electroluminescent element
A surface treatment and electrode technology, which is applied in the field of organic electroluminescent elements and its manufacturing, can solve problems such as complex operations, and achieve the effects of improving wettability, improving luminous characteristics, and high smoothness
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[0189] Hereinafter, although this invention is demonstrated more concretely based on an Example, this invention is not limited to these Examples.
[0190] [test methods]
[0191] 1. ITO electrode (ITO film);
[0192]
[0193] The work function was measured by atmospheric photoelectron spectroscopy (AC-2: manufactured by Riken Keiki Co., Ltd.).
[0194]
[0195]The surface roughness Ra was measured using an atomic force microscope (manufactured by Keyence Co., Ltd., atomic force microscope, model VN-8010) (observation field of view: 1 μm, according to JIS1994 method).
[0196]
[0197] A water droplet having a diameter of 100 μm was dropped on the surface of the glass substrate with the ITO film, and the contact angle was measured by the droplet method (θ / 2 method) using CA-D (manufactured by Kyowa Interface Science Co., Ltd.). It should be noted that in Table 1, a contact angle of less than 4° means that the dropped water droplets are not rounded, and the contact ang...
manufacture example 1
[0208] Dissolve the compound represented by the above formula E-2 (iridium complex having a polymerizable substituent) in the ratio of E-2:E-54:E-66=1:4:5 (mass ratio) in dehydrated toluene, The compound (hole-transporting compound) represented by the above formula E-54 and the compound (electron-transporting compound) represented by the above-mentioned formula E-66 were dissolved in V-601 (Wako Pure Chemical Industries, Ltd. ) system), perform freezing and degassing operation, then make it vacuum-tight, stir and react at 70°C for 100 hours. After the reaction, the reaction liquid was added dropwise into acetone to cause precipitation, and then reprecipitation was repeated three times with toluene-acetone to purify the phosphorescent polymer compound. Here, as acetone and toluene, those obtained by distilling high-purity grades (manufactured by Wako Pure Chemical Industries, Ltd.) were used.
[0209] In addition, the solvent after the reprecipitation purification operation wa...
Embodiment 1
[0213] Water glass (SiO 2 -Na 2 O, manufactured by Wako Pure Chemical Industries, Ltd., SiO 2 Concentration of 52-57%) was added to pure water (conductivity: 1μS / cm, the same is true for pure water below.) to prepare about 0.32% by mass in terms of Si atoms and 0.23% by mass in terms of Na atoms. Aqueous solution of sodium silicate (Na + Ion / Si atom=0.9 (molar ratio)). The pH of the aqueous solution was about 13 at room temperature. This aqueous solution was heated to 40° C., and while maintaining the temperature at 40° C., a glass substrate with an ITO film (manufactured by Geomatec Co., Ltd., flat ITO, shape: 200 mm×200 mm square, work of the ITO electrode) was immersed in the aqueous solution. Function: -4.8eV, contact angle to water: 25°), the aqueous solution was stirred with a magnetic stirrer for 24 hours.
[0214] Thereafter, the glass substrate with the ITO film was taken out, immediately transferred to a beaker filled with pure water, shaken slightly, and the gl...
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