OLED Panel Magnetic Particles Enhance Internal Quantum Efficiency
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Solution Overview
Problem
Existing OLED panels suffer from reduced internal quantum efficiency due to material quality and process defects, leading to energy loss as electrons and holes recombine in the blocking layer rather than generating photons, resulting in lower luminous efficiency.
Innovation Solution
Incorporating magnetic particles in the light-emitting layer of OLED panels to create a magnetic field that increases the bonding rate of holes and electrons, allowing for improved recombination and light emission by altering the motion trajectory of rebounding carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking layer is used to prevent electron migration into the hole transport layer, then electron leakage is reduced, but hole-electron recombination efficiency decreases due to carrier rebound
Solution Approach 1:
A magnetic field is introduced as an intermediary between the blocking layer and charge carriers. The magnetic field interacts with the motion of holes and electrons, causing them to spiral or orbit along magnetic field lines, which increases their residence time near the blocking layer interface and enhances recombination probability without compromising the blocking layer's electron leakage prevention function
Solution Approach 2:
The patent applies a magnetic field (changing the magnetic parameter) to the OLED structure. This magnetic field parameter modification alters the trajectory and residence time of charge carriers near the blocking layer, transforming the recombination dynamics from direct rebound to extended interaction, thereby improving recombination efficiency while maintaining the blocking layer's integrity
2Ease of manufacture
If material quality and process defects are present in the light-emitting layer, then manufacturing is simplified, but internal quantum efficiency decreases due to impurity ionization and lattice scattering
Solution Approach 1:
The patent converts the harmful effect of carrier rebound (which causes energy loss) into a beneficial effect by introducing a magnetic field. The magnetic field causes carriers to spiral or orbit, extending their interaction time with the light-emitting layer materials, which compensates for the negative effects of material defects and impurities, thereby improving internal quantum efficiency without requiring higher material quality standards
3Reliability
If the blocking layer completely prevents hole entry into the light-emitting layer, then electron blocking is improved, but light emission efficiency decreases due to reduced carrier recombination
Solution Approach 1:
The magnetic field serves as a mediator that enables hole entry into the light-emitting layer without compromising the blocking layer's electron blocking function. The magnetic field guides holes along spiral or orbital paths, allowing them to penetrate the blocking layer interface and reach the light-emitting layer, thereby enhancing light emission efficiency while the blocking layer maintains its electron blocking reliability
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 magnetic field in the OLED panel enhances internal quantum efficiency, reducing energy loss and improving power efficiency and lifespan of OLED displays.
Implementation Method 1
magnetic particles are disposed in the light-emitting layer, the magnetic particles are configured to generate a magnetic field on a blocking layer where the hole transport layer and the light-emitting layer intersect
Implementation Method 2
the injected holes and electrons meet in the luminescent layer to combine into excitons and excitons to recombine and transfer the energy to the luminescent material, which emits light after the radiation relaxation process
Data Source
AI summary
The present disclosure relates to an OLED display panel and a manufacturing method of the same. The OLED panel includes an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode disposed on a substrate. The anode transporting holes to the hole injection layer, the holes penetrating the hole injection layer into the hole transport layer, the cathode transporting electrons to the electron transport layer. The electrons pass through the electron transport layer and enter the light-emitting layer. Magnetic particles are provided in the light-emitting layer and generate a magnetic field on the barrier layer where the hole transport layer and the light-emitting layer intersect to change trajectories of electrons and holes that fail to normally enter the barrier layer and rebound, moving it again to the blocking layer for bonding, thereby increasing the internal quantum efficiency of the OLED assembly.