The present disclosure provides an organic compound represented by general formula [1] below.

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In formula [1], Ar.sub.1 and Ar.sub.2 each represent an alkyl group having 1 to 8 carbon atoms, an aromatic hydrocarbon group having 6 to 18 carbon atoms, or a heteroaromatic group having 3 to 17 carbon atoms. Ar.sub.1 and Ar.sub.2 may be the same or different. Ar.sub.3 and Ar.sub.4 are each a substituent having a carbazolyl group. Ar.sub.3 and Ar.sub.4 may be the same or different. Ar.sub.1 to Ar.sub.4 may be substituted. At least one of Ar.sub.1 to Ar.sub.4 has a tert-butyl group. The total number of tert-butyl groups in one molecule of the organic compound is 2 or more.

The invention relates to novel organic semiconducting compounds containing a polycyclic unit, to methods for their preparation and educts or intermediates used therein, to compositions, polymer blends and formulations containing them, to the use of the compounds, compositions and polymer blends as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, perovskite-based solar cell (PSC) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE, OPV, PSC, OPD, OFET and OLED devices comprising these compounds, compositions or polymer blends.

A multifunctional imaging device is provided. The imaging device includes first to fourth light-receiving elements and first and second functional layers. The first to fourth light-receiving elements are photoelectric conversion elements having sensitivity to light of different wavelengths from each other. The first and second functional layers each include first and second transistors. The first functional layer and the fourth to first light-receiving elements are stacked in this order over the second functional layer. In each of the first to fourth light-receiving elements, a first conductive layer, a first buffer layer, a photoelectric conversion layer, a second buffer layer, and a second conductive layer are stacked in this order. The photoelectric conversion layer includes an organic compound, and the first buffer layer and the second buffer layer each include a metal or an organic compound. The first transistor is electrically connected to the first conductive layer of any of the first to fourth light-receiving elements. The second transistor is electrically connected to the first transistor.

An object of the present invention is to provide a photoelectric conversion element that exhibits excellent external quantum efficiency and responsiveness to light at all wavelengths in a red wavelength region, a green wavelength region, and a blue wavelength region. Another object of the present invention is to provide an imaging element, an optical sensor, and a compound related to the photoelectric conversion element.

The photoelectric conversion element includes, in the following order, a conductive film, a photoelectric conversion film, and a transparent conductive film, in which the photoelectric conversion film contains a compound represented by Formula (1).

##STR00001##

The present invention is to provide a photoelectric conversion element that exhibits excellent external quantum efficiency and responsiveness to light at all wavelengths in a red wavelength range, a green wavelength range, and a blue wavelength range, an imaging element, an optical sensor, and a compound. The photoelectric conversion element includes, in the following order, a conductive film, a photoelectric conversion film, and a transparent conductive film, in which the photoelectric conversion film contains a compound represented by Formula (1).

##STR00001##

The present invention is to provide a photoelectric conversion element that exhibits excellent external quantum efficiency and responsiveness to light at all wavelengths in a red wavelength range, a green wavelength range, and a blue wavelength range, an imaging element, an optical sensor, and a compound. The photoelectric conversion element includes, in the following order, a conductive film, a photoelectric conversion film, and a transparent conductive film, in which the photoelectric conversion film contains a compound represented by Formula (1).

##STR00001##

A first object of the present invention is to provide a photoelectric conversion element having a high external quantum efficiency and small variation in response. A second object of the present invention is to provide an imaging element, an optical sensor, and a compound related to the photoelectric conversion element.

The photoelectric conversion element includes, in the following order, a conductive film, a photoelectric conversion film, and a transparent conductive film, in which the photoelectric conversion film contains a compound represented by Formula (1).

##STR00001##

A photoelectric conversion device in an embodiment includes a first photoelectric conversion part including a first transparent electrode, a first photoelectric conversion layer, and a first counter electrode and a second photoelectric conversion part including a second transparent electrode, a second photoelectric conversion layer, and a second counter electrode, the first photoelectric conversion part and the second photoelectric conversion part being provided on a transparent substrate. The first counter electrode and the second transparent electrode are electrically connected by a connection part. As for the first photoelectric conversion layer and the second photoelectric conversion layer, adjacent portions of the adjacent first and second photoelectric conversion layers are electrically separated by an inactive region having electrical resistance higher than that of the first and second photoelectric conversion layers.

A polymer solar cell includes a photoactive layer, a cathode electrode, and an anode electrode. The photoactive layer includes a polymer layer and a carbon nanotube layer. The polymer layer includes a first polymer surface and a second polymer surface opposite to the first polymer surface. A portion of the carbon nanotube layer is embedded in the polymer layer, and another portion of the carbon nanotube layer is exposed from the polymer layer. The cathode electrode is located a surface of the carbon nanotube layer away from the polymer layer. The anode electrode is located on the first polymer surface and spaced apart from the carbon nanotube layer. The entire second polymer surface is exposed.

A polymer solar cell includes a photoactive layer, a cathode electrode, and an anode electrode. The photoactive layer includes a polymer layer and a carbon nanotube layer. The polymer layer includes a first polymer surface and a second polymer surface opposite to the first polymer surface. A portion of the carbon nanotube layer is embedded in the polymer layer, and another portion of the carbon nanotube layer is exposed from the polymer layer. The cathode electrode is located a surface of the carbon nanotube layer away from the polymer layer. The anode electrode is located on the first polymer surface and spaced apart from the carbon nanotube layer. The entire second polymer surface is exposed.