Disubstituted diaryloxybenzoheterodiazole compound of general formula (I): ##STR00001##
in which: Z represents a sulfur atom, an oxygen atom, a selenium atom; or an NR.sub.5 group in which R.sub.5 is selected from linear or branched C.sub.1-C.sub.20, or from optionally substituted aryl groups; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in the claims. The disubstituted diaryloxybenzoheterodiazole compound of general formula (I) can advantageously be used as a spectrum converter in luminescent solar concentrators (LSCs) which are in turn capable of improving the performance of photovoltaic devices (or solar devices) selected, for example, from photovoltaic cells (or solar cells), photovoltaic modules (or solar modules) on either a rigid substrate or a flexible substrate.

An infrared photodiode includes a first electrode including a reflective layer, a second electrode facing the first electrode, and a photoelectric conversion layer between the first electrode and the second electrode. The photoelectric conversion layer includes an infrared absorbing material. A maximum absorption wavelength of the infrared absorbing material in a solution state is greater than about 700 nm and less than or equal to about 950 nm. The infrared photodiode is configured to exhibit an external quantum efficiency (EQE) spectrum in a wavelength region of greater than or equal to about 1000 nm.

A compound comprising a ligand L.sub.A, having a structure of Formula I,

##STR00001##

is provided. In Formula I, A.sup.1 to A.sup.8 are each independently CR or N; at least two adjacent ones of A.sup.1 to A.sup.8 are CR and the Rs are joined together to form a six-membered ring fused to ring A or ring C; X is O, S, or Se; each R and R.sup.B is independently hydrogen or a substituent; any adjacent substituents are optionally joined or fused into a ring; the ligand L.sub.A is coordinated to a metal M; the metal M is bonded to ring A through a M-C bond; the metal M can be coordinated to other ligands; and the ligand L.sub.A is optionally linked with other ligands. Formulations, OLEDs, and consumer products containing such compounds are also disclosed.

Provided are a condensed cyclic compound represented by Formula 1 and an organic light-emitting device including the same: ##STR00001##
wherein, in Formula 1, X.sub.1, A.sub.1, L.sub.11, a11, Ar.sub.11, Ar.sub.12, b11, R.sub.11, R.sub.12, c11, and c12 are the same as defined in the specification.

Disclosed are a series of photoisomeric compounds, preparation method therefor and device comprising the compounds, wherein a photoisomeric compound-graphene molecular junction device is formed by linking the photoisomeric compound to a gap of two-dimensional monolayer graphene having a nano-gap array via an amide covalent bond. When a single photoisomeric compound is bridged to the gap of the two-dimensional monolayer graphene having a nano-gap array, the devices have a reversible light-controlled switching function and a reversible electrically-controlled switching function. A molecular switch device prepared by the method can achieve a high reversibility and a good reproducibility. The number of light-controlled switching cycles can exceed 10.sup.4, and the number of electrically-controlled switching cycles can reach about 10.sup.5 or greater. Moreover, the above-mentioned reversible molecular switch device remains stable within a period of more than one year. In addition, flexible non-losable organic memory transistor devices and light-responsive organic transistor devices can be constructed using the above-mentioned series of photoisomeric compounds.

The present disclosure relates to an organic compound of Formula, and an organic light emitting diode and an organic light emitting display device including the organic compound. In Formula, X is oxygen (O) or sulfur (S), and each of R1 to R4 is independently selected from the group consisting of deuterium, halogen, cyano, C1 to C10 alkyl group, C1 to C10 alkoxy group, C3 to C30 cycloalkyl group, C6 to C30 aryl group, C6 to C30 arylamino group, and C5 to C30 heteroaryl group, wherein each of L1 and L2 is independently selected from the group consisting of C6 to C30 arylene group and C5 to C30 heteroarylene group, and wherein each of a and b is independently 0 or 1, each of c and f is independently an integer of 0 to 3, and each of d and e is independently an integer of 0 to 2.

##STR00001##

[Problem] Provided are a photoelectric conversion device and an imaging apparatus capable of improving quantum efficiency and a response speed. [Solving means] A first photoelectric conversion device according to one embodiment of the present disclosure includes a first electrode, a second electrode opposed to the first electrode, and a photoelectric conversion layer. The photoelectric conversion layer is provided between the first electrode and the second electrode and includes at least one type of one organic semiconductor material having crystallinity. Variation in a ratio between horizontally-oriented crystal and vertically-oriented crystal in the photoelectric conversion layer is three times or less between a case where film formation of the one organic semiconductor material is performed at a first temperature and a case where the film formation of the one organic semiconductor material is performed at a second temperature. The second temperature is higher than the first temperature.

A composition comprising an electron acceptor material and an electron donor material wherein the electron acceptor material is a compound of formula (I): EAG-EDG-EAG (I) wherein each EAG is an electron-accepting group and EDG is a group of formula (II): (II) wherein: n is at least 1; each m is independently 0 or at least 1; each X, Y and A is independently O, S or Se; Z, independently in each occurrence if n is greater than 1, is O, S, C═O or NR.sup.9 wherein R.sup.9 is H or a substituent; and R.sup.1-R.sup.8 are each independently selected from H or a substituent. The composition may be used as photosensitive organic layer of an organic photodetector.

##STR00001##

A photoelectric conversion element 10A according to an embodiment of the present disclosure includes: a first electrode 21; a second electrode 23 that is disposed to be opposed to the first electrode 21; and a photoelectric conversion layer 22 that is provided between the first electrode 21 and the second electrode 23. The photoelectric conversion layer 22 includes a hole transporting material as a first organic semiconductor material. The hole transporting material absorbs blue light.

In one aspect, π-conjugated asymmetric molecular dyes are described herein comprising a donor (D)-acceptor (A) architecture across a thiazolothiazole electronic bridge. In some embodiments, a π-conjugated asymmetric molecular dye has a difference between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of at least 1.2 eV. In some embodiments, the HOMO-LUMO offset is 1.2 eV to 5 eV. The π-conjugated asymmetric molecular dye may also display a change in dipole moment between ground and excited states of at least 5 D.