Abstract: A quantum dot layer according to the disclosure includes a first quantum dot and a second quantum dot each having a surface, 80% or more of which is occupied by a region constituted by one type of equivalent crystal plane and having a first lattice constant. The quantum dot layer includes a matrix material that fills a space between the first quantum dot and the second quantum dot. The matrix material has a second lattice constant that is from 95% to 105% of the first lattice constant.

Abstract: A light-emitting element according to an aspect of the disclosure, comprising: a first electrode; a second electrode; a light-emitting layer disposed between the first electrode and the second electrode; and a charge transport layer disposed between the first electrode and the light-emitting layer. The charge transport layer includes a first layer and a second layer closer to the first electrode relative to the first laver. The first layer and the second layer include nanoparticles containing an identical semiconductor A particle size of the nanoparticle of the second layer is larger than a particle size of the nanoparticle of the first layer.

Abstract: In order to realize a light-emitting element having high luminous efficiency in a light-emitting device with quantum dots, the light-emitting element including a hole transport layer and a light-emitting layer including a quantum dot luminescent body, the hole transport layer and the light-emitting layer being layered on each other is provided. The hole transport layer includes a compound of one or more of Cu+, Ag+, and Au+, and one or more of I?, SCN?, SeCN?, and CN?.

Abstract: A light-emitting element includes: an anode and a cathode; and at least one layer provided between the anode and the cathode, and containing a first material having a bandgap of 3.0 eV or more and a thermal conductivity of 200 W/mK or more.

Abstract: A red light-emitting element includes an anode, a cathode, and a red light-emitting layer, the red light-emitting layer includes a compound including Sn (IV) and a chalcogen, a quantum dot, a first compound including Sn (II) and a chalcogen of the same element as the chalcogen, and a chalcogenium ion of the same element as the chalcogen, and a substance amount rate of Sn (II) to Sn (IV) is more than 0% and equal to or less than 50%.

Abstract: A display device includes the following: a first light-emitting layer including a first inorganic matrix and a first quantum dot; and a self-assembled monolayer composed of monomolecules adjacent to each other, and having a surface that exhibits liquid repellency against a polar solvent, the monomolecules each having a distal end on one side that is a non-polar functional group.

Abstract: An EML includes: quantum dots; inorganic ligands; and alkanolamine. In a unit volume of the EML, a molar ratio of the alkanolamine to the inorganic ligands is in a range of 10 or more and 1000 or less.

Abstract: A quantum dot according to the present application includes a surface including polar planes accounting for an area percentage of 70% or more, or a surface including non-polar planes accounting for an area percentage of 70% or more.

Abstract: A light-emitting element includes a first light-emitting layer including a plurality of first quantum dots and a plurality of spacer particles. The plurality of first quantum dots each includes a first core and a first shell coating the first core and having an outermost layer containing either a metal chalcogenide complex or a metal chalcogenide compound.

Abstract: A light-emitting element according to an aspect of the disclosure, comprising: a first electrode; a second electrode; a light-emitting layer disposed between the first electrode and the second electrode: and a charge transport layer disposed between the first electrode and the light-emitting layer. The charge transport layer includes a first layer and a second layer closer to the first electrode relative to the first laver. The first layer and the second layer include nanoparticles containing an identical semiconductor A particle size of the nanoparticle of the second layer is larger than a particle size of the nanoparticle of the first layer.

Abstract: An information processing device includes a receiving unit for receiving face image data of a student, who takes a class in a classroom, a plurality of times during the class from a camera provided in the classroom; a control unit for comparing the face image data with registered face image data of the student and count the number of times the student of the registered face image data is photographed by the camera during the class; and a transmission unit for transmitting the number of times of photographing to a terminal device used by a teacher who teaches the class.

Abstract: In order to realize a light-emitting element having high luminous efficiency in a light-emitting device with quantum dots, the light-emitting element including a hole transport layer and a light-emitting layer including a quantum dot luminescent body, the hole transport layer and the light-emitting layer being layered on each other is provided. The hole transport layer includes a compound of one or more of Cu+, Ag+, and Au+, and one or more of I?, SCN?, SeCN?, and CN?.

Abstract: An information providing method for providing a user who uses a device with information via a mobile owned by the user, the method generating the information to be provided to the user, in accordance with: lifestyle information obtained by a lifestyle information obtaining unit receiving the lifestyle information from the device used by the user, the lifestyle information being information on a state of operation of the device; and location information obtained by a location information obtaining unit receiving the location information indicating a location to which the user traveled.

Abstract: An information processing apparatus 20 includes: a transmission section 21 that transmits screen information for displaying a predetermined screen to a terminal 10; and a reception section 21 that receives information inputted by a first user from the terminal 10, and executes a bet of the first user based on the received information, wherein the screen information includes information related to one or more second users who already placed a bet, and the reception section 21 receives information for identifying at least one second user selected by the first user, or at least part of bet information of the selected at least one second user, and executes the bet of the first user based on the received information.

Abstract: An information processing device includes a receiving unit for receiving face image data of a student, who takes a class in a classroom, a plurality of times during the class from a camera provided in the classroom; a control unit for comparing the face image data with registered face image data of the student and count the number of times the student of the registered face image data is photographed by the camera during the class; and a transmission unit for transmitting the number of times of photographing to a terminal device used by a teacher who teaches the class.

Abstract: An information providing method for providing a user who uses a device with information via a mobile owned by the user, the method generating the information to be provided to the user, in accordance with: lifestyle information obtained by a lifestyle information obtaining unit receiving the lifestyle information from the device used by the user, the lifestyle information being information on a state of operation of the device; and location information obtained by a location information obtaining unit receiving the location information indicating a location to which the user traveled.

Abstract: An information providing method for providing a user who uses a device with information via a mobile owned by the user, the method generating the information to be provided to the user, in accordance with: lifestyle information obtained by a lifestyle information obtaining unit receiving the lifestyle information from the device used by the user, the lifestyle information being information on a state of operation of the device; and location information obtained by a location information obtaining unit receiving the location information indicating a location to which the user traveled.

Abstract: Provided is an information providing method for generating and providing information, in accordance with: lifestyle information obtained by a lifestyle information obtaining unit receiving, from each of plural devices used by plural users, information on a state of operation of the device; and location information of each user traveled, which is obtained by a location information obtaining unit receiving the location information.

Abstract: Provided is a multistage amplifier that can achieve both utilizing in a broad bandwidth and suppressing gain reduction. The multistage amplifier includes a plurality of differential amplifiers which are connected in series; and a direct-current component limiter that cuts off a direct-current component of input signals, in which the direct-current component limiter is disposed between the plurality of differential amplifiers, and in which a transistor size of a first differential amplifier which is disposed immediately after the direct-current component limiter is equal to or greater than a transistor size of a second differential amplifier which is disposed two stages before the direct-current component limiter.

Abstract: Provided is a compensation circuit capable of improving compensation precision for manufacturing variations. The compensation circuit includes a manufacturing variation detection circuit which detects manufacturing variation of a transistor based on a first voltage output from an output terminal of the transistor having an input terminal applied with a substantially constant first current to temperature or based on a second current output from an output terminal of the transistor having an input terminal applied with a substantially constant second voltage to temperature, and a voltage generation circuit which generates a supply voltage supplied to an electric circuit based on the manufacturing variation. The first current corresponds to the substantially constant second voltage to temperature, and the first voltage corresponds to the substantially constant second current to temperature.