LIGHT-EMITTING DEVICE
Provided is a light emitting device with high luminous efficiency and reliability which includes a first material which exhibits luminescence from an excited doublet state based on an f-d transition in a light emitting layer and a second material which is a fluorescent material, wherein an absorptio...
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| Main Authors | , , |
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| Format | Patent |
| Language | English Korean |
| Published |
12.09.2023
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| Subjects | |
| Online Access | Get full text |
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| Summary: | Provided is a light emitting device with high luminous efficiency and reliability which includes a first material which exhibits luminescence from an excited doublet state based on an f-d transition in a light emitting layer and a second material which is a fluorescent material, wherein an absorption edge located at a longest wavelength among absorption edges in an absorption spectrum of the first material is located at a shorter wavelength than an absorption edge located at a longest wavelength among absorption edges in an absorption spectrum of the second material. Since the first material has a short exciton lifetime and high exciton generation efficiency, and an energy transfer between the first material and the second material is efficient, the light emitting device with high luminous efficiency and reliability can be obtained.
발광 효율 및 신뢰성이 높은 발광 디바이스를 제공한다. 발광층에 f-d 전이에 기초한 이중항 여기 상태로부터의 발광을 나타내는 제 1 물질과, 형광 물질인 제 2 물질을 포함하고, 제 1 물질의 흡수 스펙트럼에서의 흡수단 중 가장 장파장에 위치하는 흡수단이 제 2 물질의 흡수 스펙트럼에서의 흡수단 중 가장 장파장에 위치하는 흡수단보다 단파장에 위치하는 발광 디바이스를 제공한다. 제 1 물질은 여기자 수명이 짧고 여기자 생성 효율이 높은 점, 그리고 제 1 물질과 제 2 물질의 에너지 이동이 효율적인 점으로부터, 발광 효율 및 신뢰성이 높은 발광 디바이스를 얻을 수 있다. |
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| Bibliography: | Application Number: KR20230025680 |