An organic photovoltaic device comprising a polymer: ##STR00001##
and an acceptor. In this organic photovoltaic device, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of: a halogen, a substituted alkyl, an unsubstituted alkyl, a substituted aryl, an unsubstituted aryl, a substituted heteroaryl and an unsubstituted heteroaryl.

An organic photovoltaic device includes an anode and a cathode. The organic photovoltaic device includes an active layer between the anode and the cathode. The active layer includes a p-type material. The p-type material includes a donor-acceptor (DA) polymer. An acceptor unit of the DA polymer includes a functionalized pyranopyran-dione compound or a functionalized naphthyridine-dione compound.

The invention relates to novel conjugated polymers containing one or more diindeno-thieno[3,2-b]thiophene based polycyclic repeating units, to methods for their preparation and educts or intermediates used therein, to polymer blends, mixtures and formulations containing them, to the use of the polymers, polymer blends, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these polymers, polymer blends, mixtures or formulations.

There is provided p-type organic polymers of general formula I. The polymers may be useful as semi-conducting material. Thus, thin films and devices comprising such polymers are also provided.

An organic compound, a donor-acceptor conjugated polymer, a formulation and a thin film, wherein a solution of the donor-acceptor conjugated polymer exhibits a peak optical absorption spectrum red shift of at least 100 nm when the donor-acceptor conjugated polymer solution is cooled from 140° C. to room temperature.

Provided is a hyperbranched polymer having such a backbone that is readily decomposable by an acid. The hyperbranched polymer is derived from, via reaction, monomers including a monomer (X) and a monomer (Y). The monomer (X) contains three or more hydroxy groups per molecule. The monomer (Y) contains two or more groups represented by General Formula (y) per molecule. The monomer (X) includes at least one compound selected from the group consisting of cyclodextrins, compounds represented by General Formula (I), pillararenes, compounds represented by General Formula (II), compounds represented by General Formula (III), and compounds represented by General Formula (IV). The monomer (Y) includes a compound represented by General Formula (1). General Formulae (y), (I), (II), (III), (IV), and (1) are expressed as follows:

##STR00001## ##STR00002##

The present specification provides a copolymer and an organic solar cell including the same.

The present invention relates to polymers comprising one or more (repeating) unit(s) of the formula (I), and compounds of formula (III), wherein Y, Y.sup.15, Y.sup.16 and Y.sup.17 are independently of each other a group of formula and their use as IR absorber, organic semiconductor in organic devices, especially in organic photovoltaics and photodiodes, or in a device containing a diode and/or an organic field effect transistor. The polymers and compounds according to the invention can have excellent solubility in organic solvents and excellent film-forming properties. In addition, high efficiency of energy conversion, excellent field-effect mobility, good on/off current ratios and/or excellent stability can be observed, when the polymers and compounds according to the invention are used in organic field effect transistors, organic photovoltaics and photodiodes. ##STR00001##

The present specification provides a copolymer and an organic solar cell including the same.

There is a conjugated polymer having a derivative of indacen-4-one having general formula (I): ##STR00001## wherein: R.sub.1 and R.sub.2, same or different, are selected from C.sub.1-C.sub.30 alkyl groups, linear or branched; optionally substituted cycloalkyl groups; optionally substituted aryl groups; optionally substituted heteroaryl groups; C.sub.1-C.sub.30 alkoxyl groups, linear or branched; R.sub.4—O—[CH.sub.2—CH.sub.2—O].sub.m— polyoxyethylene groups, wherein R.sub.4 is selected from C.sub.1-C.sub.30 alkyl groups, linear or branched, and m is an integer ranging from 1 to 4; —R.sub.5—OR.sub.6 groups, wherein R.sub.5 is selected from C.sub.1-C.sub.30 alkylene groups, linear or branched, and R.sub.6 represents a hydrogen atom or is selected from C.sub.1-C.sub.30 alkyl groups, linear or branched, or is selected from R.sub.4—[—OCH.sub.2—CH.sub.2—].sub.p— polyoxyethylene groups, wherein R.sub.4 has the same meanings as reported above and p is an integer ranging from 1 to 4; —COR.sub.7 groups, wherein R.sub.7 is selected from C.sub.1-C.sub.30 alkyl groups, linear or branched; —COOR.sub.8 groups, wherein R.sub.8 is selected from C.sub.1-C.sub.30 alkyl groups, linear or branched; or they represent a —CHO group or a cyano (—CN) group; R.sub.3 is selected from C.sub.1-C.sub.30 alkyl groups, linear or branched; optionally substituted cycloalkyl groups; optionally substituted aryl groups; and C.sub.1-C.sub.30 alkoxyl groups, linear or branched; n is an integer ranging from 10 to 500. There is also a photovoltaic device (or solar device) having a support having the conjugated polymer having a derivative of indacen-4-one.