Ag-Rich OLED Second Electrode for Low Power
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Solution Overview
Problem
Existing OLED display panels using MgAg alloy second electrodes suffer from inefficiencies in red and green light emission due to varying light transmittance, increased power consumption, and high bulk resistance, which degrades device efficiency and lifespan.
Innovation Solution
The use of a second electrode made of Ag or a metal alloy containing Ag, where the Ag content exceeds the sum of all other elements, balances light-emitting efficiencies and reduces bulk resistance, thereby reducing operating voltage and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If MgAg alloy is used as the second electrode, then blue light efficiency is improved, but power consumption increases
Solution Approach 1:
The patent changes the material composition parameter of the second electrode from MgAg alloy to Ag-based alloy with Ag content greater than the sum of all other elements. This composition change simultaneously improves overall light efficiency (including red and green) and reduces power consumption by optimizing the electrical and optical properties of the electrode.
2Ease of manufacture
If MgAg alloy is used as the second electrode, then manufacturing is achieved, but manufacturing cost increases and deposition rate control becomes difficult
Solution Approach 1:
The patent changes the material composition to Ag-based alloy with Ag content greater than the sum of all other elements, which simplifies the deposition process. The Ag-based alloy enables better control over deposition rate and reduces manufacturing complexity compared to MgAg alloy, while maintaining manufacturing feasibility.
3Ease of manufacture
If MgAg alloy is used as the second electrode, then device is formed, but bulk resistance is high leading to high operating voltage
Solution Approach 1:
The patent changes the material composition parameter of the second electrode from MgAg alloy to Ag-based alloy with Ag content greater than the sum of all other elements. This composition change significantly reduces the bulk resistance of the electrode, thereby lowering the operating voltage of the OLED display panel while maintaining device formation capability.
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 improves light-emitting efficiency, reduces power consumption, and extends the lifespan of OLED display panels by balancing light transmittance and lowering operating voltage.
Implementation Method 1
the Mg—Ag alloy exhibits different light transmittance of red, green, and blue light
Implementation Method 2
The substantially high bulk resistance of Mg leads to a substantially high operating voltage
Data Source
AI summary
The present disclosure provides an OLED display panel, an electronic device, and a manufacturing method. The OLED display panel comprises a substrate, a first electrode, a light-emitting function layer, and a second electrode including Ag or a metal alloy containing Ag. When the second electrode is made of the metal alloy containing Ag, a content of Ag in the second electrode is more than a sum of contents of all other elements in the second electrode.