摘要:
The present invention discloses a thermally activated delayed fluorescence material and application thereof in an organic electroluminescence device. The thermally activated delayed fluorescence material is a compound having the general structure of Formula I or Formula II:
In Formula I and Formula II, R 1 is a cyano, p is 1, 2 or 3, q is 1, 2 or 3, m is 1 or 2, n is 1 or 2, Ar 1 is a phenyl substituted with one or more groups selected from C 1-6 alkyl, methoxy, ethoxy, or phenyl, Ar 2 and Ar 3 are selected from the following groups:
and X is bromine or iodine. The present invention further discloses application of the thermally activated delayed fluorescence material as a host material or a luminescent dye of a luminescent layer of an organic electroluminescence device.
摘要:
Disclosed is an organic electroluminescent device, comprising a substrate and light emitting units formed in sequence on the substrate, characterized in that, each of the light emitting units comprises a first electrode layer (1), a light emitting layer (2) and a second electrode layer (3), the light emitting layer comprises a host material and a dye, the host material is made of materials having both electron transport capability and hole transport capability; at least one material in the host material has a CT excited triplet state energy level T 1 greater than its n-π excited triplet state energy level S 1 , and T 1 -S 1 ≤ 0.3eV; or, at least one material in the host material has a CT excited triplet state energy level T 1 greater than its n-π excited triplet state energy level S 1 , and T 1 -S 1 ≥ 1eV, with the difference between its n-π excited second triplet state energy level and its CT excited first singlet state energy level being in the range of -0.1eV to 0.1eV. The organic electroluminescent device configuration can sufficiently utilize the triplet state energy in the host material and the dye to increase the luminous efficiency and prolong the service life of the device.
摘要:
The present invention discloses a phosphorescent organic electroluminescence device including a hole transport layer, a luminescent layer and an electron transport layer, which are successively laminated. The luminescent layer has a double-layer structure comprising a hole transport material layer and an electron transport material layer. The hole transport material layer is arranged between the hole transport layer and the electron transport material layer. The electron transport material layer is arranged between the hole transport material layer and the electron transport layer. An exciplex is formed on the interface of contact between the hole transport material layer and the electron transport material layer. The hole transport material layer includes a host material, the host material being a material having hole transport capability; and the electron transport material layer includes a host material and a phosphorescent dye doped in the host material, the host material being a material having electron transport capability.
摘要:
The present invention relates to a depositable ionic organic functional material having a structure shown in the following formula (1):
wherein, R is a hydrogen atom, a halogen atom or -CF 3 ; R' is a hydrogen atom or a halogen atom; the N^N ligand is selected from Pzpy shown in the following formula (31) and its derivatives, Pyim shown in the following formula (32), Ptop shown in the following formula (33), Pop shown in the following formula (34), and Bpy shown in the following formula (35):
When the functional material is used as a luminescent dye, the synthesis conditions are mild and easy to carry out, the yield is high, and the product is simple to purify. The functional material can be used in high-efficiency blue to red OLEDs.
摘要:
An organic light-emitting display device (100). A functional structure layer (130) of the organic light-emitting display device (100) comprises a hole injection layer (131), a first hole transport layer (1321), a second hole transport layer (1322), an organic light-emitting layer (133), an electron transport layer (134) and an electron injection layer (135) which are sequentially laminated on a first electrode (110). The highest occupied orbital energy level of the material of the first hole transport layer (1321) is less than the highest occupied orbital energy level of the second hole transport layer (1322). A triplet state energy level of the material of the second hole transport layer (1322) is greater than 2.5 eV. The organic light-emitting layer (133) comprises a main light-emitting material, and the main light-emitting material comprises a thermal activation delay fluorescent material. The organic light-emitting display device (100) adopts two hole transport layers, wherein the second hole transport layer (1322) acts as both an electron blocking layer and an optical compensation layer, and matches the thermal activation delay fluorescent material in the organic light-emitting layer (133), thereby improving the current efficiency and service life of the organic light-emitting display device (100).
摘要:
The present invention pertains to the field of electroluminescence, and particularly relates to an electrode and an organic electroluminescent device using the same. The electrode comprises a first layer (1) and a second layer (2) arranged in a stacked manner. The first layer (1) is an alkali earth metal alloy layer, and the second layer (2) has a work function of 2.0eV to 3.5eV. The composite layered electrode with a gradient of work function has very good stability, which can effectively prolong the service life of the device. The work function of the second layer (2) is only 2.0eV to 3.5eV, which can effectively reduce the barrier potential of the organics-metal interface, and in the meantime, the composite electrode structure with a gradient of work function can lower the electron injection barrier potential in a step-by-step manner, thereby providing orderly guidance for electron injection, so that the light-emitting efficiency of the device is improved.
摘要:
The present invention discloses a thermally activated and sensitized phosphorescence organic electroluminescence device, comprising a luminescent layer, wherein a host material of the luminescent layer consists of two materials, wherein one of the two materials is a hole transport material, the other is an electron transport material, at least one of the two materials is a thermally activated delayed fluorescence material; and the host material is doped by a phosphorescent dye, and a proportion of the phosphorescent dye in the luminescent layer is