Samsung Electronics Co., Ltd.

Weonkyu Koh

Junghyun Park

Kyungsang Cho

Sungjun Park

Junho Lee

Younggeun Roh

Yeonsang Park

Hyochul Kim

Dongjin Yun

Yongnam Ham

Taeho Shin

An optical spectrometer may include an optical filter including a plurality of filter layers formed on a base substrate. The filter layers may include a perovskite material and at least two filter layers among the plurality of filter layers may include perovskite materials having different composition ratios from each other. The filter layers may show respective band-gap characteristics in different optical wavelength ranges from each other, in an optical absorption spectrum and/or an optical transmission spectrum.

Optical filter and optical spectrometer including the same

A substituted nanocrystal including a nanocrystal represented by Formula 1, wherein a portion of halogen atoms in an outermost region of the nanocrystal is substituted with a chloride anion, a polyatomic anion, or a combination thereof:AMX&#x2003;&#x2003;Formula 1

Nanocrystal, method of preparing the same, and optoelectronic device including the nanocrystal

A quantum dot light emitting device includes a grating device which includes a grating region that has a particular grating interval, and a quantum dot layer located above the grating region. The device provides high-purity color light based on a selection of a wavelength band by the grating region in correspondence with a wavelength band of light emitted from the quantum dot layer.

Quantum dot light emitting device and optical apparatus including the same

Provided are optoelectronic devices including quantum dots. An optoelectronic device may include an active layer including a quantum dot and at least one molecular interlayer adjacent to the active layer. The active layer may be provided between two electrodes, and a charge transfer layer may be provided adjacent to the active layer. The molecular interlayer may be provided between the active layer and the charge transfer layer. The molecular interlayer may have a smaller amount of surface charge than the charge transfer layer. The molecular interlayer may include a nonionic material or a hydrophobic material. The charge transfer layer may include an electron transport layer, and the electron transport layer may include an inorganic semiconductor.

Optoelectronic device including quantum dot

A nanocrystal represented by the following Formula 1 and a preparation method thereof:AMXL&#x2003;&#x2003;Formula 1

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Suwon-si, South Korea

Weonkyu Koh