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Light-emitting device

專利號
US12200953B2
公開日期
2025-01-14
申請人
SHARP KABUSHIKI KAISHA（JP Sakai）
發(fā)明人
Takayuki Naka; Yoshihiro Ueta; Noboru Iwata
IPC分類
H01L51/50; H10K50/115; H10K50/17; H10K59/35; H10K85/10; H10K50/15; H10K102/00
技術(shù)領(lǐng)域
htl,eml,emitting,quantum,light,layer,il,10r,10g,etl
地域： Sakai

摘要

A light-emitting device includes an HTL including a metal chalcogenide between an anode and an EML, with an IL including an organic material at least between the HTL and the EML. A distance between the HTL and the EML in a light-emitting element that emits light in a wavelength band having the shortest light emission peak wavelength is greater than a distance between the HTL and the EML in each of the other light-emitting elements.

說明書

Examples of the ligands LR, LG, LB include hexadecylamine, oleylamine, octylamine, hexadecanthiol, dodecanthiol, trioctylphosphine, trioctylphosphine oxide, myristic acid, and oleic acid. The ligands LR, LG, LB also serve as dispersing agents that improve a dispersibility of the quantum dots QR, QG, QB in the dispersions.

As a feature of the core-shell type quantum dot QD, a wavelength of light emitted by the core-shell type quantum dot QD is dependent on a particle size of the core that is a light-emitting portion and is independent of a particle size of the shell. A wavelength of light emitted by the quantum dots QR, QG, QB can be controlled according to the particle size of the cores CR, CG, CB of the quantum dots QR, QG, QB.

The quantum dot QD tends to lengthen in light emission wavelength as the particle size of the core that is the light-emitting portion is increased, and tends to shorten in the light emission wavelength as the particle size of the core is decreased.

As illustrated in FIG. 2, given d1 as the particle size (diameter size) of the core CR, d11 as the particle size (diameter size) of the core CG, and d21 as the particle size (diameter size) of the core CB, then d1>d11>d21. The particle sizes (hereinafter referred to as “core diameters”) d1, d11, d21 of these cores CR, CG, CB need only be set as appropriate to obtain the desired light emission wavelengths depending on the materials of the cores CR, CG, CB, and are not particularly limited. These core diameters d1, d11, d21 can be set as in the related art.

權(quán)利要求

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