A method for manufacturing a light-emitting device a first solution including a first solvent, quantum dots, a ligand, and a first inorganic precursor, the quantum dots each including a core and a first shell performing first heating of raising to a first temperature or higher, the first temperature being a higher temperature of a melting point of the ligand and a boiling point of the first solvent, and performing second heating of raising to a second temperature, the second temperature being higher than the first temperature and being a temperature at which the first inorganic precursor epitaxially grows and a second shell coating the first shell is formed to form a plurality of first quantum dots, and wherein a plurality of second quantum dots each including, in a core, the same material as a material of the second shells are also formed.

A GHeT includes a bottom gate formed on a substrate; a first dielectric layer (DL) formed on the bottom gate; a monolayer film formed of an atomically thin material on the first DL; a bottom contact (BC) formed on part of the monolayer film; a second DL formed on the BC; a top contact (TC) formed on the second DL on top of the BC; a network of CNTs formed on the TC and the monolayer film, to define an overlap region with the monolayer film; a third DL formed on the CNT network, the monolayer film and the TC; and a top gate formed on the third DL and overlapping with the overlap region. Such GHeT design allows gate tunability of Gaussian peak position, height and width that define Gaussian transfer characteristic, thereby enabling simplified circuit architectures for various spiking neuron functions for emerging neuromorphic applications.

A quantum dot, and an ink composition, a light-emitting device, an optical member, and an apparatus, each including the quantum dot. The quantum dot includes: a nanoparticle; and at least one ligand on a surface of the nanoparticle, wherein the nanoparticle does not include mercury and cadmium, and the at least one ligand includes at least two thiol groups and at least one hydrophilic group.

Provided herein are wafers that can be used to align carbon nanotubes, as well as methods of making and using the same. Such wafers include alignment areas that have four sides and a surface charge, where the alignment areas are surrounded by areas that have a surface charge of a different polarity. Methods of the disclosure may include depositing and selectively etching a number of hardmasks on a substrate. The described methods may also include depositing a carbon nanotube on such a wafer.

A light emitting thin film and a manufacturing method thereof, a light emitting device and a displaying substrate, which relates to the technical field of displaying. The light emitting thin film includes a polymer (1) and a quantum dot (2) bonded to the polymer (1); the quantum dot (2) includes a metal nanoparticle (3) and a core-shell structure connected to the metal nanoparticle (3); and the metal nanoparticle (3) is bonded to the polymer (1) by a sulfide bond.

The present invention relates to a composition which comprises an electron-transporting host and a hole-transporting host, to the use thereof in electronic devices and to electronic devices containing this composition. The electron-transporting host is particularly preferably selected from the class of the triazine-dibenzofuran-carbazole systems or the class of the triazine-dibenzothiophene-carbazole systems. The hole-transporting host is preferably selected from the class of the biscarbazoles.

The present invention provides novel triazatruxene derivatives that are useful as hole transport materials (HTM), particularly, in optoelectronic devices. The utility of the novel compounds was confirmed in solid-state, sensitized solar cells based on organic-inorganic perovskites used as light harvesters. The devices achieved high power conversion efficiencies.

Hybrid organic-inorganic perovskite thin films with average grain sizes of at least 50 micrometers were prepared and employed in solar cells. The PCE values of the solar cells did not degrade with the direction or the scan-rate of the applied voltage. The larger average grain sizes are believed to assist in reducing the influence of defect states on carrier recombination. The tunability of PCE with substrate temperature may be correlated to the quality of the crystalline perovskite formed using the hot-casting procedure. The larger average grain sizes lead to good crystalline quality, low defect density, and high carrier mobility. The process for growing hybrid organic-inorganic perovskites may be applicable to the preparation of other materials to overcome problems related to polydispersity, defect formation, and grain boundary recombination.

Objects of the present invention are to provide an organic semiconductor element in which carrier mobility is high, variation of mobility is suppressed, and temporal stability under high temperature and high humidity is excellent, and a manufacturing method thereof, to provide a novel compound suitable for an organic semiconductor, and to provide an organic semiconductor film in which mobility is high, variation of mobility is suppressed, and temporal stability under high temperature and high humidity is excellent, a manufacturing method thereof, and an organic semiconductor composition that can suitably form the organic semiconductor film.

The organic semiconductor element according to the present invention is an organic semiconductor layer containing a compound having a constitutional repeating unit represented by Formula 1 and having a molecular weight of 2,000 or greater.

D-A  (1)

An improved switching material for forming a composite article over a substrate is disclosed. A first volume of nanotubes is combined with a second volume of nanoscopic particles in a predefined ration relative to the first volume of nanotubes to form a mixture. This mixture can then be deposited over a substrate as a relatively thick composite article via a spin coating process. The composite article may possess improved switching properties over that of a nanotube-only switching article. A method for forming substantially uniform nanoscopic particles of carbon, which contains one or more allotropes of carbon, is also disclosed.