Quantum Dot Ink Compositionand a Quantum Dot Electroluminescent Device

• Main Authors: YOO, JUN MO, ENDO HIROKO, YAMADA YUKIKA, JANG, HYO SOOK, MOTOYAMA TAKAO, KIKUCHI TOMOYUKI, JANG, EUN JOO, WON, YU HO, FURUTA KEIGO, KIM, TAE HO
• Format: Patent
• Language: English; Korean
• Published: 23.08.2023
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; ELECTRICITY; FILLING PASTES; INKS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

Disclosed are a quantum dot ink composition that is excellent in both dispersion stability and elasticity of quantum dots and a quantum dot electroluminescent device including a light emitting layer formed from the quantum dot ink composition. The quantum dot ink composition includes a plurality of quantum dots and a mixed solvent containing at least the following solvent a and the following solvent b, wherein a surface tension is about 30 mN/m to about 40 mN/m, the solvent a is a cycloalkane compound having a linear alkyl group having 4 to 16 carbon atoms, and the solvent b is an aromatic hydrocarbon compound having a linear alkyl group having 2 to 12 carbon atoms. 양자점의 분산 안정성 및 착탄성이 모두 우수한 양자점 잉크 조성물로서, 복수의 양자점, 및 하기 용매 a와 하기 용매 b를 적어도 함유하는 혼합 용매를 포함하고, 표면 장력이 약 30 mN/m 내지 약 40 mN/m 인 양자점 잉크 조성물, 및 상기 양자점 조성물로부터 형성되는 발광층을 포함하는 양자점 일렉트로루미네선스 소자를 개시한다: 용매 a: 탄소수 4 이상 16 이하의 직쇄상의 알킬기를 가지는 사이클로 알칸 화합물, 용매 b: 탄소수 2 이상 12 이하의 직쇄상의 알킬기를 가지는 방향족 탄화수소 화합물.