Sejong University

Kyungpook National University Industry-academic Cooperation Foundation

Kee-sun Sohn

Min-seuk Kim

Ji Sik Kim

Un-bea Park

Jin-woong Lee

Suman Timilsina

Un-Bea Park

A method of identifying and analyzing materials includes selecting at least two elements, collecting data of a plurality of compounds analyzed to be producible by the at least two elements, preparing image or spectrum-type analysis data for each of the plurality of collected compounds, selecting binary or higher-order compounds from among the plurality of compounds to mix the selected compounds at a predetermined mixing ratio, and generating training data including resultant data obtained by combining and processing the image or spectrum-type analysis data according to the predetermined mixing ratio, performing machine learning using the training data, and identifying and/or analyzing image or spectrum-type analysis data obtained from an actual material, using a model obtained through the machine learning.

Method of identification and analysis for materials

The present invention relates to a positive electrode active material for a potassium secondary battery, the positive electrode active material according to the present invention is a crystalline material comprising: K; a transition metal; P; and O, and comprises, as a main image, an image indicating a diffraction peak having a relative intensity of 5% or more in a range of Bragg angles (2&#x3b8;) of a X-ray diffraction pattern of 14.7&#xb0; to 15.7&#xb0;, 22.1&#xb0; to 23.1&#xb0;, 25.5&#xb0; to 26.5&#xb0;, and 29.7&#xb0; to 30.8&#xb0;, when the relative intensity of the diffraction peak having the highest intensity is taken as 100% in the powder X-ray diffraction pattern of the material.

Positive electrode active material for potassium secondary battery and potassium secondary battery containing same

The invention relates to a red phosphor with a narrow full width at half maximum, having improved decay time and resolving afterglow phenomenon. The fluoride-based phosphor according to the invention is characterized in including a host having a composition of the following [Formula 1] including rubidium (Rb), cesium (Cs), silicon (Si) and fluorine (F) as constituent elements, and manganese (Mn) which is solid solution treated in the host as an activator:RbCsSiF&#x2003;&#x2003;[Formula 1] (where, 0&#x3c;x&#x3c;3).

Fluoride-based phosphors for light emitting device

A strain sensor with color emission indicating a strain is disclosed. The strain sensor can include a piezoresistive layer having a first portion of a polymer matrix body and conductive fillers dispersed in the first portion of the polymer matrix body, a mechano-luminescent layer having a second portion, which is disposed on the first portion, of the polymer matrix body, green emissive particles, and red emissive particles, the green and red emissive particles being dispersed in the second portion of the polymer matrix body, and a first and second electrodes spaced apart from each other and directly connected to the piezoresistive layer.

Growing community of inventors

Seoul, South Korea

Kee-sun Sohn