Quantum Dot Electroluminescent Layering for Carrier Balance
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Solution Overview
Problem
Carrier balance in active-matrix quantum dot light emitting diode (AMQLED) display panels is a challenge that affects the efficiency of these devices.
Innovation Solution
An electroluminescent device is designed with an ionic complex layer between the electron transport layer and the quantum dot light emitting layer, creating a built-in electric field that adjusts the vacuum level and reduces potential energy barriers, thereby improving carrier balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an ionic complex layer with built-in electric field is introduced between the electron transport layer and quantum dot light emitting layer, then carrier balance is improved and light emitting efficiency is enhanced, but device structure becomes more complex
Solution Approach 1:
An ionic complex layer is introduced as an intermediary between the electron transport layer and quantum dot light emitting layer. This intermediate layer contains built-in electric field that mediates carrier transport, improving electron injection efficiency while reducing hole injection efficiency, thereby achieving carrier balance without requiring complex external field control mechanisms
Solution Approach 2:
The ionic complex layer utilizes changes in electric field parameters (built-in electric field direction and magnitude) to control carrier transport properties. By adjusting the ionic complex composition and structure, the vacuum level and potential energy barriers are modified, enabling optimized carrier balance and light emitting efficiency
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 implementation of the ionic complex layer enhances electron injection efficiency while reducing hole injection efficiency, effectively balancing carriers in the quantum dot light emitting layer, improving light emitting efficiency, and prolonging the service life of the electroluminescent device.
Implementation Method 1
an ionic complex layer between the electron transport layer and the quantum dot light emitting layer, wherein a built-in electric field is in the ionic complex layer
Data Source
AI summary
An electroluminescent device, a display substrate, and a display apparatus. The electroluminescent device comprises: an electron transport layer (1) and a quantum dot light emitting layer (3) that are arranged in a stack mode; and an ionic complex layer (2) located between the electron transport layer (1) and the quantum dot light emitting layer (3), wherein a built-in electric field is formed in the ionic complex layer (2).