Platinum Emitter Light Device with Amine-Free Capping Layer
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Solution Overview
Problem
Conventional light-emitting devices face challenges in achieving simultaneous high frontal and lateral luminescence efficiency, particularly in the green spectrum range, due to limitations in light extraction and emission layer design.
Innovation Solution
A light-emitting device is designed with a specific emission layer containing a platinum-based emitter and an amine-free capping layer, where the emitter satisfies certain ligand conditions and the capping layer is optimized with a refractive index to enhance light extraction, achieving a CIEy to refractive index ratio of 38 or less, thereby improving both frontal and lateral luminescence efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional light-emitting devices use traditional emission layers and capping layers, then device structure is simple, but frontal and lateral luminescence efficiency cannot be simultaneously optimized
Solution Approach 1:
The patent optimizes the refractive index of the capping layer material as a key parameter to enhance light extraction efficiency. By selecting materials with specific refractive indices and adjusting the emission layer composition, the device achieves simultaneous improvement in both frontal and lateral luminescence efficiency without significantly increasing structural complexity
Solution Approach 2:
The patent employs composite material design in the emission layer by combining multiple emitters with different emission characteristics. This allows the device to achieve broad spectral coverage and optimized luminescence efficiency across different viewing angles, resolving the contradiction between performance and design complexity
2Illumination intensity
If traditional emitters are used in the emission layer, then device manufacturing is straightforward, but green spectrum luminescence efficiency is insufficient
Solution Approach 1:
The patent employs composite material design in the emission layer by combining multiple emitters with different emission characteristics. This allows the device to achieve broad spectral coverage and optimized luminescence efficiency across different viewing angles, resolving the contradiction between performance and design complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves excellent concurrent frontal and lateral luminescence efficiency, specifically in the green spectrum range, by optimizing the emission layer and capping layer composition, leading to enhanced light-emitting performance.
Implementation Method 1
the first emitter includes platinum... the first emitter emits first light having a first emission spectrum... emission peak wavelength of the first light is from about 520 nm to about 550 nm
Implementation Method 2
the capping layer contains an amine-free compound... a value of a ratio of CIEy to a reflective index (RCR value) of the first light extracted to the outside through the capping layer is 38 or less... RCR value is calculated by Equation 1: CIEy/R(cap)×100
Data Source
AI summary
A light-emitting device and an electronic apparatus including the same are provided. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer, and a capping layer. The emission layer includes a first emitter, the first emitter emits a first light having a first emission spectrum, the capping layer is in a path on which the first light travels, an emission peak wavelength of the first light is about 510 nm to about 550 nm. The first emitter includes platinum, the capping layer includes an amine-free compound, and a value of a ratio of CIEy to a reflective index (RCR value) of the first light extracted to the outside through the capping layer is 38 or less, and the RCR value is calculated according to CIEy/R(cap)×100.