Organic light emitting diode
A technology of organic light-emitting devices and light-emitting layers, which is applied in the fields of organic chemistry, electric solid-state devices, semiconductor devices, etc., and can solve the problems of shortening the life of organic light-emitting devices.
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Examples
Embodiment 1
[0106] 1) Materials used
[0107] HIL:Ppy / Poly(TFE-PSEPVE)
[0108] 64.6g (7.38mmol of Nafion TM monomer unit) of Nafion TM Polymer dispersion, 125 g of deionized water, 62 mg of ferric sulfate (Aldrich, Cat. #307718) and 0.175 mL (2.10 mmol) of 37% (w / w) hydrochloric acid in water (Ashland Chemicals; cat. #3471440) were placed The reaction mixture was stirred at 200 rpm in a 500 mL reaction vessel equipped with an electrically controlled propeller type stirring impeller. After stirring for 5 minutes, the color of the reaction mixture changed rapidly from clear to dark green when 0.253 mL (3.58 mmol) of freshly distilled pyrrole (Acros Organics, cat. #157711000) was added thereto. After a further 5 minutes of stirring, a gradual injection of an oxidizing solution prepared from 1.01 g (4.24 mmol) of sodium persulfate (Fluka; cat. #71889) in 10 mL of deionized water was started at a rate of 1.0 mL / hour. This was done by passing a small tube into the reaction vessel from a 10...
Embodiment 2 to 7
[0119] Examples 2 to 7 and comparative examples
[0120] An organic light-emitting device was fabricated in the same manner as in Example 1 except that the compounds shown in Table 1 were used instead of the ETL1 compound. Each compound used in Table 1 is as follows.
[0121]
experiment example
[0123] (1) Measurement of electron mobility
[0124] Electron mobility was measured for the materials used to form the electron transport layer in Examples and Comparative Examples. Specifically, the following EODs (Electronic Devices Only) were manufactured.
[0125] EOD structure: ITO / N-CGL / ETL / N-CGL / Al
[0126] -N-CGL: formed by doping the following ET1 material with 2% Li as thickness of.
[0127] -ETL: The material whose electron mobility is to be measured is formed as thickness of
[0128]
[0129] For EOD measure current according to voltage and calculate according to the following Poole-Frenkel equation at 2 x 10 5 Electron mobility in an electric field of V / cm (APPLIED PHYSICS LETTERS 90, 203512 (2007)). The results are shown in Table 1 below.
[0130] Poole-Frenkel equation
[0131]
[0132]
[0133] Among them, ε: relative permittivity ≈ 3
[0134] ε 0 : Dielectric constant in vacuum 8.85x10 -14 C / Vcm
[0135] d: thickness of ETL la...
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