Organic electroluminescent materials

来源：Seebio.cn作者：西宝生物人气：-发表时间：2012-03-01 13:04:17【大中小】

A great increase in demand for sleek, stylish, fat panel displays (FPD) has intensified research into improving current technology and developing cutting-edge next generation displays. Currently, the liquid crystal display (LCD) and the plasma display panel (PDP) are the mainstream technologies utilized for a variety of applications. Research into new technologies for the development of next generation displays has focused on the research and technical development of organic electroluminescence (EL) devices. In an EL device, fluorescent organic compounds are excited by the application of an electric field to obtain an emission of light. This area has been rapidly progressing ever since the report of a multilayer EL device in 1987. The organic EL device is expected to be the FPD device of the future, having features such as being a self-emitting device, high brightness, high efficiency, direct current low-voltage operation, and high-speed response. Today, some organic EL devices are beginning to be put into commercial use in mobile phones, in-vehicle displays, as well as other applications. The following is a view showing the frame format for a typical organic EL device.
An organic EL device has a structure in which a transparent anode (ITO electrode), hole transport layer, emitter layer, and cathode (Mg, Al electrode) are sequentially stacked on a glass substrate, as shown above. The light emission occurs by a mechanism in which a hole is first injected toward the hole transport layer from the anode, then an electron is injected toward the emitter layer from the cathode. Subsequently, the hole and the electron recombine in the emitter layer to excite the emitter layer, which results in light emission during the return of the emitter layer to the ground state.
Various technological improvements are being made, with the goal of making the device more efficient. For example, a hole injection layer is inserted between the anode and the hole transport layer, in order to promote hole injection efficiency from the anode. In addition, an electron injection layer and an electron transport layer are inserted between the cathode and the emitter layer, in order to promote electron injection and transport efficiency. Furthermore, efforts to tune the emission wavelengths are being conducted through the use of doping dyes in the emitter layer.
In addition to the above mentioned low molecular weight compounds for use in organic EL devices, the use of polymers is also being heavily explored. Polymers are superior to low molecular weight compounds because they have better film-forming properties and more durability. Additional studies aimed at increasing the efficiency of light emission are being conducted by dispersing low-molecular weight compounds in polymer films.
Listed below are our products intended for use as materials in polymeric EL devices.

Compounds for EL Research
Product name	CAS number	Package	Purity
3-(2-Benzimidazolyl)-7-(diethylamino)coumarin	27425-55-4	1g	98%
3-(2-Benzothiazolyl)-7-(diethylamino)coumarin	38215-36-0	1g	98%
Bis[2-(2-benzothiazolyl)phenolato]zinc(II)	58280-31-2	1g 5g	98%
Bis[2-(2-benzoxazolyl)phenolato]zinc(II)	23467-27-8	5g	95%
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene	7128-64-5	5g 25g	98%
4,4'-Bis(9H-carbazol-9-yl)biphenyl	58328-31-7	1g 5g	98%
2,5-Bis(4-diethylaminophenyl)-1,3,4-oxadiazole	1679-98-7	25g	98%
1,1-Bis[4-[N,N-di(p-tolyl)amino]phenyl]cyclohexane	58473-78-2	1g 5g	98%
1,1-Bis[4-[N,N-di(p-tolyl)amino]phenyl]cyclohexane	58473-78-2	1g	99%
4,4'-Bis(5-methyl-2-benzoxazolyl)stilbene	2397-00-4	5g 25g	98%

Vinyl Carbazoles
Product name	CAS number	Package	Purity
9-Vinylcarbazole	1484-13-5	25g	98%
Poly(N-vinylcarbazole)	25067-59-8	5g 25g

Intermediates
Diphenylamines
Product name	CAS number	Package	Purity
Bis(4-biphenylyl)amine	102113-98-4	1g 5g	98%
Bis(4-bromophenyl)amine	16292-17-4	1g 5g	98%
Triphenylamines
Product name	CAS number	Package	Purity
Bis(4-formylphenyl)phenylamine	53566-95-3	1g	95%
4-Bromotriphenylamine	36809-26-4	5g 25g	97%
Arylamines
Product name	CAS number	Package	Purity
3-Aminobiphenyl	2243-47-2	1g 5g 25g	99%
N-Benzyl-2-naphthylamine	13672-18-9	5g 25g	98%
Aryl Halides
Product name	CAS number	Package	Purity
2-Bromobiphenyl	2052-07-5	5ml	97%
4-Bromo-4'-iodobiphenyl	105946-82-5	5g 25g	98%
Naphthalenes & Anthracenes
Product name	CAS number	Package	Purity
1-Aminoanthracene	610-49-1	1g	98%
1,4-Dibromonaphthalene	83-53-4	5g 25g	97%
Pyrenes
Product name	CAS number	Package	Purity
1-Bromopyrene	1714-29-0	5g 25g	94%
1-Aminopyrene	1606-67-3	1g 5g 25g	98%
Fluorenes,Carbazoles & Dibenzothiophenes
Product name	CAS number	Package	Purity
2-Aminofluorene	153-78-6	5g 25g	97%
2,7-Dibromocarbazole	136630-39-2	1g 5g	98%
2,8-Dibromodibenzothiophene	31574-87-5	1g 5g 25g	96%
Benzoxazoles & Benzothiazoles
Product name	CAS number	Package	Purity
2-(2-Hydroxyphenyl)benzothiazole	3411-95-8	5g 25g	98%
2-(2-Hydroxyphenyl)benzoxazole	835-64-3	1g 25g	98%
Quinolines
Product name	CAS number	Package	Purity
5-Chloro-8-hydroxyquinoline	130-16-5	25g 250g	98%
5,7-Dibromo-8-hydroxyquinoline	521-74-4	25g	98%
Phenanthrolines
Product name	CAS number	Package	Purity
Bathophenanthroline	1662-01-7	1g 5g	99%
2-Chloro-1,10-phenanthroline	7089-68-1	100mg 1g	98%
Propanediones
Product name	CAS number	Package	Purity
2,6-Dimethyl-3,5-heptanedione	18362-64-6	5g 25g	97%
Hexafluoroacetylacetone	1522-22-1	5g 25g	95%
Others
Product name	CAS number	Package	Purity
4,4'-Bis(diethylphosphonomethyl)biphenyl	17919-34-5	1g 5g	95%
4,7-Dibromo-2,1,3-benzothiadiazole	15155-41-6	1g 5g 25g	98%
Diethyl Benzylphosphonate	1080-32-6	25g	98%
Diethyl (3-Chlorobenzyl)phosphonate	78055-64-8	1g 5g	95%
3,4,9,10-Perylenetetracarboxylic Dianhydride	128-69-8	25g 500g	98%