Organic electroluminescence device and preparation method thereof
A technology for electroluminescent devices and organic light-emitting layers, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve the problems of complex evaporation process, high vacuum technology, and high cost.
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[0033] The preparation method of the small molecule organic electroluminescence device: an anode, an organic functional layer and a cathode are sequentially prepared on a glass substrate.
[0034] Step (1): Prepare the anode layer: the anode layer is generally metal oxides such as ITO, zinc oxide, tin-zinc oxide, or metals with high work functions such as gold, copper, and silver, and the optimal choice is ITO.
[0035] Step (2): preparing an organic light-emitting layer: the light-emitting layer is prepared by spin-coating by doping a dye as a guest material with a small-molecule host material. The host material includes: materials with hole transport function such as TBCPF, DCB, CPTBF and materials with electron transport function such as OXD-7 and PBD. The selected guest materials, for example, the red ionic phosphorescent material is selected from Ir-qlbi, the green ionic phosphorescent material is selected from Irdf-pybi, and the blue ionic phosphorescent material is sele...
Embodiment 1
[0045] Step (1) Cleaning of pre-engraved ITO glass substrates: use hot detergent ultrasonic and deionized water ultrasonic methods to clean the transparent conductive substrate ITO glass, place it under an infrared lamp to dry after cleaning, and then The dried ITO substrate was pretreated by low-energy oxygen ion beam bombardment, the sheet resistance of the ITO film was 15Ω, and the film thickness was 150nm. Then continue to prepare the anode modification layer, and prepare a PEDOT:PSS thin film as the anode modification layer by spin coating on the pretreated glass substrate, annealing on a hot plate at 200°C for 10 minutes, and the film thickness is 40nm.
[0046] Step (2) Preparation of the organic light-emitting layer: the above-mentioned anode-modified substrate is transferred to a nitrogen-protected glove box, and the small molecule host material TBCPF, OXD-7 and the blue ionic phosphorescent material Irdf-pzpy are mixed according to a weight ratio of 6 : 3: 1 dissolve...
Embodiment 2
[0049] According to the method of step (1) of Example 1, an anode was prepared on a glass substrate.
[0050] Step (2) Preparation of the organic light-emitting layer: the above-mentioned anode-modified substrate is transferred to a nitrogen-protected glove box, and the small molecule host material TBCPF, OXD-7 and the blue ionic phosphorescent material Ir-pzpy are mixed according to a weight ratio of 6 : 3: 1 dissolved in 1,2-dichloroethane, and then spin-coated on the above substrate to obtain a light-emitting layer, and annealed on a hot plate at 80° C. for 30 minutes, with a film thickness of 80-100 nm.
[0051] The cathode was prepared according to the method of step (3) of Example 1.
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