51results about How to "Good electron delocalization performance" patented technology

The invention belongs to the field of photoelectronic materials, and discloses an organic semiconductor material containing dithienothiophene and thienopyrryldiketone units, and a preparation method and application thereof. The organic semiconductor material has the following general formula (I), wherein R1, R2 and R3 are respectively a C1-C20 alkyl group, and n is a whole number which is greater than 1 and less than or equal to 100. Compared with the prior art, the alkyl group is introduced to enhance the solubility and molecular weight of the product, thereby implementing a spin coating polymer or spin coating oligomer. Since the polymer formed by the thienopyrryldiketone monomers and thienothiophene monomers can form a very strong donor-receptor structure, the stability of the material is enhanced, and the band gap of the material can be easily reduced, thereby widening the sunlight absorption range and enhancing the photoelectric conversion efficiency.

The invention provides a copolymer containing dithieno (3,2-b:2',3'-d) thiophene-silole (2,3-b:3',2'-d) (diazosulfide) as well as a preparation method and an application of the copolymer. The copolymer provided by the invention is a copolymer P which has the general formula shown in the specification, wherein in the formula, R1 and R2 represent alkyl groups of C1 to C20; R3 and R4 represent H or alkyl groups of C1 to C20; n represents an integer between 1 and 100. The copolymer contains a new silole (2,3-b:3',2'-d) (diazosulfide) conjugation unit which has a high matching degree with solar spectrum and is of a plane conjugation structure at the same time, so that the charge carrier migration rate is high. Thus, the energy conversion efficiency is improved. A preparation method of the copolymer is simple and controllable. As a result, the copolymer provided by the invention has good application prospects in the fields of polymer solar cells, organic electroluminescent devices and other photoelectric materials.

The invention provides a copolymer containing dibenzothiophene-silole-di(diazosulfide) as well as a preparation method and an application thereof. The copolymer containing dibenzothiophene-silole-di(diazosulfide) is a copolymer P with the general formula as shown in the specification, wherein R1 and R2 are C1-C20 alkyls, R3 is H or C1-C20 alkyls, and n is an integer between 1 and 100 in the formula. The copolymer containing the dibenzothiophene-silole-di(diazosulfide) disclosed by the invention contains a new silole-di(diazosulfide) conjugated unit, is high in matching degree with a solar spectrum, and simultaneously is in a planer conjugate structure, and high in vector migration rate, the energy conversion efficiency is improved, and the preparation method is simple and controllable, and has a good application prospect in the photoelectric material fields such as a polymer solar cell, an organic light-emitting device and the like.

Relating to the technical field of organic materials, the invention provides a fluorene-based copolymer containing thiophene and thiophene pyrroledione units, as shown in formula (I). Specifically, R1, R2 and R3 are alkyl groups selected from C1-C20; R4, R5, R6, R7, R8 and R9 are alkyl groups selected from H or C1-C20; x+y=1, and x and y are both unequal to zero; m is an integer from 1-5; n is aninteger from 1-100. The invention also provides a preparation method of the fluorene-based copolymer containing thiophene and thiophene pyrroledione units, as well as application of the copolymer. Inthe copolymer of the invention, the fluorene unit, the thiophene unit and the thiophene pyrroledione unit are combined together organically so as to form a strong donor-acceptor structure, thus benefiting for improving the stability of the copolymer material, reducing the band gap of the material, enlarging the absorption scope of sunlight, and improving the photoelectric conversion efficiency.

The invention provides a copolymer containing 3,6-carbazole-benzobis(benzothiadiazole), a preparation method and applications thereof. The copolymer containing 3,6-carbazole-benzobis(benzothiadiazole) is represented by a formula which is represented in the description; wherein in the formula, the R1, R2 and R3 individually represent a C1-C20 alkyl group, and n is an integer in a range of 1 to 100. The energy gap of the copolymer containing 3,6-carbazole-benzobis(benzothiadiazole) is narrow.