Samsung Electronics Co., Ltd.

Chan Suk Min

Chul Soo Yoon

Hyong Sik Won

Seong Min Kim

Youn Gon Park

Sung Hak Jo

Tae Hoon Kim

Jong Won Park

In Hyung Lee

Ji Ho You

Jeong Rok Oh

Chi Woo Lee

A method of manufacturing a fluoride phosphor, the method comprising: preparing a hydrofluoric (HF) solution in which a first source material and a fluoride containing Mnare dissolved; and forming fluoride particles by introducing a second source material to the HF solution in each of a plurality of instances.

Method of manufacturing fluoride phosphor, white light emitting apparatus, display apparatus, and lighting device

According to one example of the present application, a phosphor has the following composition formula (1): [composition formula 1] SiAlON:Re, where x, y and z are 0.018&#x2266;x&#x2266;0.3, 0.3&#x2266;y&#x2266;0.75, 0.42&#x2266;z&#x2266;1.0, respectively, and Re is a rare earth element. Therefore, even when the aluminum concentration is 0.42 mol to 1.0 mol, a sialon phosphor of the present application exhibits high luminance and has a particle size D50 varying between 5 to 20 &#x3bc;m. In addition, a method for preparing a phosphor according to one example of the present application involves adjusting the oxygen concentration to ensure the superior crystallinity of the phosphor and thus improve the luminance thereof.

Phosphor and method for preparing same

The fluorescent substance according to one embodiment of the present invention has the following compositional formula (1): [Compositional formula 1] SrSiAlON:Re. Here, x, y and z are respectively 0.005&#x2266;x&#x2266;0.05, 0.05&#x2266;y&#x2266;0.5, 0.001&#x2266;z&#x2266;0.50, and Re is a rare earth element. As a result, the fluorescent substance according to one embodiment of the present invention can exhibit a short wavelength of between 525 nm and 537 nm when the concentration of strontium is between 0.05 moles and 0.5 moles. Also, the fluorescent substance can exhibit a short wavelength of between 525 nm and 537 nm by the addition of barium in a range of between 0.003 moles and 0.125 moles when the concentration of aluminium is high. Also, the fluorescent substance can exhibit a short wavelength of between 525 nm and 537 nm by adjusting the oxygen concentration by the addition not only of AlN but also of AlOas an aluminium precursor when the concentration of aluminium is high. Ultimately, since the fluorescent substance according to one embodiment of the present invention can exhibit a short wavelength of between 525 nm and 537 nm, it is possible to prevent dropoff in colour reproduction and the colour rendering index.

Fluorescent substance and a production method therefor

There are provided a phosphor and a light emitting device. The phosphor includes a phosphor composition including a rare-earth element employed in a compound represented by the equation: LSiN, wherein L is one or more elements selected from La, Y, Gd and Lu, the rare-earth element is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Tb, Ho, Er, Tm and Yb. The phosphor composition is provided in particle form. The particle has at least a portion of a plane perpendicular to a [001] direction to be flat thereon so as to have a crystal plane.

Phosphor composition, light emitting device, and the method of preparing the phosphor composition

A phosphor is represented by a general Formula: EuMLSiAlNOand satisfies 0.00001&#x2266;x&#x2266;2.9999, 0.0001&#x2266;y&#x2266;2.99999 and 0&#x2266;z&#x2266;6.0. L is at least one element selected from La, Y, Gd and Lu. M is at least one element selected from Ca, Sr, Ba and Mn.

Growing community of inventors

Suwon-si, South Korea

Chan Suk Min