摘要:
A constant current source with threshold voltage and channel length modulation comprises a set of cascade transistors and a compensation circuit electrically connected to the set of cascade transistors so as to form a feedback circuit, in which the set of cascade transistors including a first MOS transistor and a second MOS transistor, and the compensation circuit comprises a third MOS transistor, a fourth MOS transistor, a sixth MOS transistor and a seventh MOS transistor. The gate terminal of the third MOS transistor is connected to the gate terminal of the second MOS transistor. The fourth MOS transistor is connected to the third MOS transistor in serial, and the gate terminal of the fourth MOS transistor is connected to the gate terminal of the first MOS transistor, and the second terminal of the fourth MOS transistor is connected to a current-supplying circuit. The gate terminals of the sixth and seventh MOS transistors are electrically connected to the current-supplying circuit, and a current is generated by mirroring flows through the third MOS transistor.
摘要:
Novel heteroleptic iridium carbene complexes are provided, which contain phenyl imidazole moieties. In particular, ligands containing 2,4,6-trisubstituted N-phenyl imidazole fragments have highly desirable properties that make them suitable materials for use in OLED devices.
摘要:
A new class of compounds containing aza-dibenzothiophene or aza-dibenzofuran are provided. The compounds may be used in organic light emitting devices giving improved stability, improved efficiency, long lifetime and low operational voltage. In particular, the compounds may be used as the host material of an emissive layer having a host and an emissive dopant, or as a material in an enhancement layer.
摘要:
Novel heteroleptic iridium carbene complexes are provided, which contain at least two different carbene ligands. Selective substitution of the carbene ligands provides for phosphorescent compounds hat are suitable for use in a variety of OLED devices.
摘要:
An organic light emitting device having an anode, a cathode and an organic layer disposed between the anode and the cathode is provided. In one aspect, the organic layer may be an emissive layer comprising one of the following compounds:
摘要:
Carbazole-containing compounds are provided. In particular, the compounds are oligocarbazole-containing compounds having an unsymmetrical structure. The compounds may be useful in organic light emitting devices, in particular as hosts in the emissive layer of such devices.
摘要:
Novel materials are provided, having a single phenyl or a chain of phenyls where there is a nitrogen atom on each end of the single phenyl or chain of phenyls. The nitrogen atom may be further substituted with particular thiophene, benzothiophene, and triphenylene groups. Organic light-emitting devices are also provided, where the novel materials are used as a hole transport material in the device. Combinations of the hole transport material with specific host materials are also provided.
摘要:
Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1′,2′-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.
摘要:
Devices containing a particular combination of organic compounds are provided. In particular, the devices contain twisted aryl compounds having extended conjugation (i.e., the twisted aryl is substituted with an additional aryl group) in combination with dibenzothiophene or dibenzofuran containing host materials. The organic light emitting devices may provide improved stability color, lifetime and manufacturing. Compounds containing a twisted aryl having extended conjugation are also provided.
摘要:
Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode; a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer; an electron transport layer; and a cathode disposed, in that order, over a substrate.