Abstract: A display substrate includes a base substrate, and a pixel define layer and a first electrode which are disposed on the base substrate. The pixel define layer comprises an opening, a side wall of the first electrode is in a step shape, and the opening is exposed out of the first electrode. The pixel define layer covers at least part of a side wall of the first electrode. The orthographic projection, on the base substrate, of the surface of the first electrode away from the base substrate falls within the orthographic projection of the opening on the base substrate.

Abstract: An organoboron compound for reductive synthesis includes a structure of Formula (I). A method for preparing the organoboron compound includes providing a first precursor having a structure of Formula (IV), with R1 and R2 each being the mono-, di or tri substitution, and converting the first precursor into the organoboron compound.

Abstract: A light-emitting diode includes a base and light-emitting devices including a first light-emitting device, a second light-emitting device, and a third light-emitting device. The area of the first light-emitting device, the area of the second light-emitting device, and the area of the third light-emitting device decrease in order. Each light-emitting device includes a light-emitting stacked layer. In two adjacent light-emitting devices, at least one light-emitting device further includes a first reflective layer provided between a light-emitting stacked layer of the light-emitting device to which the first reflective layer belongs and another light-emitting device. The first reflective layer covers a first region and exposes at least a portion of a second region, the first region being a region where the two adjacent light-emitting devices overlap with each other, and the second region being a region where the two adjacent light-emitting devices are non-overlapping with each other.

Abstract: Provided in the present disclosure are a light-emitting substrate and a display apparatus. The light-emitting substrate includes: a driving backplane; a plurality of light-emitting chips, arranged on the driving backplane in an array, where the light-emitting chip includes a buffer layer, an N-type semiconductor layer, a multi-quantum well layer, and a P-type semiconductor layer sequentially arranged on the driving backplane in a stacked manner; and a grating structure, on a side of the plurality of light-emitting chips facing away from the driving backplane, where the grating structure has a plurality of regions, and the regions are configured to transmit light of different wavelength bands.

Abstract: Embodiments are directed to an electronic device that includes a housing, a light emitter, a first detector positioned at a first separation distance from the light emitter, and a second detector positioned at a second separation distance from the light emitter. The electronic device can include a processor that is configured to cause the light emitter to emit light toward a user, receive a first measurement from the first detector based on a return of the emitted light from tissue of the user and receive a second measurement from the second detector based on a return of the emitted light from the tissue of the user. The processor can determine a decay constant of the emitted light using the first measurements and the second measurements, and determine a water content metric of the user using the determined decay constant.

Abstract: Disclosed is a biphenol metal complex. The structure thereof is as represented by formula I, wherein R1 and R1? are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R3—R7, R3?—R7? are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl, any two adjacent groups of R3—R7 are optionally linked to form a ring, and any two adjacent groups of R3?—R7? are also optionally linked to form a ring; M and M? are each independently selected from the Group 4 metals; each X is independently selected from the group consisting of a hydrocarbyl having 1 to 20 carbon atoms, hydride, amido, alkoxide, alkyl sulfide, alkyl phophide, halide, diene, amine, phosphine, ether, and combinations thereof; m and n are independently an integer of from 1 to 4; and L is a divalent linking group.

Abstract: Disclosed is a catalyst for olefin polymerization, comprising a main catalyst and a cocatalyst; the main catalyst is a bisphenol metal complex represented by formula I, and the cocatalyst comprises an organoaluminum compound; in formula I, R1, R1?, R2, R2? are the same or different, and are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R3-R7, R3?-R7? are the same or different, and are each independently selected from hydrogen and a substituted or unsubstituted C1-C20 hydrocarbyl; R8 and R9 are the same or different, and are each independently selected from hydrogen or a substituted or unsubstituted C1-C20 hydrocarbyl; M and M? are the same or different, and are selected from Group IV metals; and X is halogen;