SEMICONDUCTOR NANOPARTICLE PRODUCTION METHOD THEREOF AND ELECTROLUMINESCENT DEVICE AND DISPLAY DEVICE INCLUDING THE SAME

• Main Authors: CHO, OUL, JANG, HYO SOOK, MIN, JI HYUN, JANG, EUN JOO, HAN, YONG SEOK, LEE, IL YOUNG
• Format: Patent
• Language: English; Korean
• Published: 02.08.2023
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; SEMICONDUCTOR DEVICES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

An electroluminescent device includes a first electrode and a second electrode, and a light emitting layer disposed between the first electrode and the second electrode. The light emitting layer includes semiconductor nanoparticles. The semiconductor nanoparticles do not include cadmium. The light emitting layer is configured to emit green light. The semiconductor nanoparticles include semiconductor nanocrystals including indium, phosphorus, zinc, selenium, and sulfur. The molar ratio of zinc to indium in the semiconductor nanoparticles is 60 or more. When the electroluminescent device is driven at 2700 nit, T90 can be maintained for more than 120 hours. One embodiment relates to semiconductor nanoparticles. Therefore, the electroluminescent device can emit light with or without an additional light source. 제1전극과 제2전극, 및 상기 제1전극과 제2전극 사이에 배치되는 발광층을 포함하고, 상기 발광층은, 반도체 나노입자를 포함하고 상기 반도체 나노입자는, 카드뮴을 포함하지 않으며, 상기 발광층은, 녹색광을 방출하도록 구성되고, 상기 반도체 나노입자는, 인듐, 인, 아연, 셀레늄, 및 황을 포함하는 반도체 나노결정을 포함하고, 상기 반도체 나노입자에서 인듐에 대한 아연의 몰 비는 60 이상이다. 상기 전계 발광 소자는, 2700 nit 에서 구동 시, T90 이 120 시간 이상을 나타낼 수 있다. 일구현예는 반도체 나노입자들에 대한 것이다.