Thermoelectric Nanoparticle Layer for OLED Heat Dissipation
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Solution Overview
Problem
Conventional OLED display panels face issues with heat dissipation and carrier recombination due to temperature gradients and potential barriers, leading to reduced luminous efficiency and service life.
Innovation Solution
Incorporating a thermoelectric nanoparticle layer made of P-type nanoparticles like bismuth telluride and/or germanium-silicon alloy between the hole transport and organic light-emitting layers to facilitate spontaneous heat dissipation and create a built-in electric field that aids hole injection, improving luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional OLED structure is used, then self-luminescence and wide viewing angles are achieved, but heat dissipation is poor and organic light-emitting layer material crystallizes
Solution Approach 1:
A thermoelectric nanoparticle layer is introduced as an intermediary component between the hole transport layer and the organic light-emitting layer. This layer acts as a heat sink that actively absorbs and conducts heat away from the organic light-emitting layer, preventing material crystallization while maintaining the self-luminescence and wide viewing angle characteristics of conventional OLED structures.
Solution Approach 2:
The patent modifies the thermal parameters of the OLED structure by incorporating thermoelectric nanoparticles with specific thermal conductivity properties. This changes the heat dissipation parameter of the device, enabling effective heat removal without compromising the optical and electrical performance of the organic light-emitting layer.
2Loss of energy
If potential barriers are present in electron and hole migration process, then carrier recombination is reduced, but total number of carriers into light-emitting layer decreases and luminous efficiency lowers
Solution Approach 1:
The thermoelectric nanoparticle layer serves as an intermediary that creates a built-in electric field to facilitate carrier transport. This mediator reduces the potential barrier effect by providing an electric field that drives holes from the hole transport layer into the organic light-emitting layer, thereby increasing the total number of carriers without excessive recombination loss.
Solution Approach 2:
The patent replaces the reliance on simple diffusion-driven carrier transport with an electric field-driven transport mechanism. The built-in electric field in the thermoelectric nanoparticle layer substitutes for the insufficient diffusion process, enabling more efficient carrier injection into the light-emitting layer and improving luminous 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 thermoelectric nanoparticle layer enhances heat dissipation and hole injection efficiency, thereby improving the luminous efficiency and extending the service life of OLED display panels.
Implementation Method 1
the thermoelectric nanoparticle layer will absorb heat from the direction of the base layer to achieve the purpose of spontaneous heat dissipation
Implementation Method 2
holes inside the thermoelectric nanoparticle layer will diffuse from a hot end to a cold end to form a built-in electric field
Data Source
AI summary
A display panel, a manufacturing method thereof, and a display device are provided. The display panel includes a base layer, an anode layer disposed on the base layer, a hole transport layer disposed on the anode layer, a thermoelectric nanoparticle layer disposed on the hole transport layer, an organic light-emitting layer disposed on the thermoelectric nanoparticle layer, an electron transport layer disposed on the organic light-emitting layer, and a cathode layer disposed on the electron transport layer.