Organic Light-Emitting Component With Thin Charge Carrier Layer
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Solution Overview
Problem
Conventional organic light-emitting components face challenges in maximizing usable optical power while minimizing production costs and outlay.
Innovation Solution
The design incorporates a thin charge carrier generating layer sequence, typically less than 50 nm thick, positioned between light-emitting layers to enhance optical amplification and reduce material usage, along with specific emitter materials like fluorescent blue and phosphorescent red-green emitters arranged in optimal amplification regions for efficient light generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional charge carrier generating layer sequence is used in organic light-emitting components, then sufficient charge carrier generation is achieved, but the thickness and material usage increase, reducing production efficiency and increasing costs
Solution Approach 1:
The patent applies parameter changes by reducing the thickness of the charge carrier generating layer sequence from conventional thicker layers to a specific thin configuration (at most 50 nm). This thickness parameter optimization maintains sufficient charge carrier generation capability while minimizing material usage and production time, directly resolving the contradiction between reliability and layer thickness.
2Power
If multiple light-emitting layer sequences are stacked to emit different wavelengths, then color rendering and optical power are improved, but the device complexity and production outlay increase
Solution Approach 1:
The patent applies segmentation by dividing the light-emitting component into multiple light-emitting layer sequences, each responsible for specific wavelength ranges. The first sequence emits blue light (450-480 nm) and the second sequence emits red-green mixed light (600-780 nm), with a thin charge carrier generating layer sequence separating them. This segmentation enables full-spectrum white light emission while maintaining manageable structural complexity through functional division.
Solution Approach 2:
The thin charge carrier generating layer sequence serves multiple functions simultaneously: it generates charge carriers for both adjacent light-emitting layer sequences, electrically connects them, and enables independent operation of each sequence. This multi-functionality reduces the need for additional separate components, thereby improving optical power without proportionally increasing device complexity.
3Productivity
If thicker charge carrier generating layer sequences are used, then charge carrier output is sufficient, but material usage and production costs increase
Solution Approach 1:
The patent optimizes the thickness parameter of the charge carrier generating layer sequence to at most 50 nm, which is sufficient to generate and output charge carriers to multiple light-emitting layer sequences. This parameter optimization maintains productivity (charge carrier output) while minimizing the quantity of substance (material usage), directly resolving the contradiction between these two parameters.
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
This configuration significantly increases usable optical power, reduces production costs by minimizing material usage, and ensures long-term stability with high efficiency in emitting white light.
Implementation Method 1
a light-emitting layer sequence described here comprises at least one electroluminescent layer in which charge carriers—electrons and holes—recombine with generation of light
Implementation Method 2
materials which exhibit emission of radiation on account of fluorescence or phosphorescence, for example, polyfluorene, polythiophene or polyphenylene or derivatives, compounds, mixtures or copolymers thereof
Implementation Method 3
materials which exhibit emission of radiation on account of fluorescence or phosphorescence
Data Source
AI summary
An organic light-emitting component includes a first light-emitting layer sequence, which is designed to emit light in a first wavelength range during the operation of the component. A second light-emitting layer sequence is designed to emit light in a second wavelength range during the operation of the component. A charge carrier generating layer sequence is designed to output charge carriers to the first light-emitting layer sequence and to the second light-emitting layer sequence during the operation of the component. The first wavelength range differs from the second wavelength range. The charge carrier generating layer sequence is arranged between the first light-emitting layer sequence and the second light-emitting layer sequence in a stacking direction of the organic light-emitting component.