公开(公告)号：US20220085315A1

公开(公告)日：2022-03-17

申请号：US17341205

申请日：2021-06-07

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Soohyun PARK ,  Donghoon KWAK ,  Seulgi HAN

IPC: H01L51/50 ,  H01L27/32

Abstract: An electronic device includes a base layer, a first electrode disposed on the base layer, a pixel defining layer disposed on the base layer and having an opening that exposes an upper surface of the first electrode, a hole transport region disposed in the opening and having a thickness that gradually decreases from a center of the opening toward a side surface of the pixel defining layer, an emission layer disposed on the hole transport region and having a thickness that gradually increases from the center of the opening toward the side surface of the pixel defining layer, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. This electronic device may increase a light-emitting area exhibiting uniform (or substantially uniform) light-emitting characteristics and exhibit high light-emitting efficiency.

公开(公告)号：US20200259093A1

公开(公告)日：2020-08-13

申请号：US16779428

申请日：2020-01-31

Applicant: Samsung Display Co., Ltd.

Inventor： Dukki KIM ,  Jaekook HA ,  Sehun KIM ,  Dongwoo SHIN ,  Donghoon KWAK ,  Junwoo PARK

IPC: H01L51/00 ,  C09D11/52 ,  C09D11/36 ,  C09D11/102

Abstract: Provided are a composition for forming an organic light-emitting device, a method of preparing an organic light-emitting device, and an organic light-emitting device. The method of preparing an organic light-emitting device includes: forming an organic layer including an emission layer on a first electrode, wherein the forming of the organic layer includes performing a solution process using a composition for forming an organic light-emitting device, the composition for forming an organic light-emitting device includes n kinds of solvent, a solvent (Sv1) having the highest boiling point among the n kinds of solvent and a solvent (Sv2) having the second highest boiling point among the n kinds of solvent satisfy Equation 1, n is an integer from 2 to 10, and the solvent (Sv1) having the highest boiling point among the n kinds of solvent is a compound represented by Formula 1.