Quantum Dot Light Emitting Element Solution Process Fabrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional quantum dot light emitting elements have complex structures requiring multiple layers formed in vacuum deposition processes, leading to increased manufacturing costs and time due to the need for multiple process chambers.
Innovation Solution
A quantum dot light emitting element is developed with a simplified structure formed by dispersing charge transporting particles and quantum dots in a solvent for a solution process, reducing the number of layers to three or less, and using oxide nanoparticles as charge transporting particles, allowing for the formation of a quantum light emitting layer and charge transporting layer in a solution process such as inkjet or spin coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional vacuum deposition process is used to form multiple layers, then the quantum dot light emitting element achieves proper layer formation, but the manufacturing cost and process time increase due to multiple process chambers
Solution Approach 1:
The patent combines multiple layers (quantum dot layer and charge transporting layer) into a single integrated layer formed by one-step spin coating process. This merging approach eliminates the need for separate vacuum deposition chambers and multiple processing steps, directly reducing device complexity while maintaining layer formation quality through the solution-based fabrication method
Solution Approach 2:
The patent changes the fabrication parameter from vacuum deposition to solution-based spin coating. This parameter change allows the quantum dots and charge transporting materials to be deposited from solution in a single step, transforming the complex multi-chamber vacuum process into a simple single-chamber solution process, thereby reducing both structure complexity and manufacturing cost
2Manufacturing precision
If multiple layers are formed in separate vacuum deposition chambers, then each layer is properly deposited, but the manufacturing cost increases
Solution Approach 1:
The patent merges the deposition of quantum dots and charge transporting materials into a single spin coating step from solution, eliminating the need for multiple vacuum deposition chambers. This significantly reduces manufacturing cost by requiring only one processing chamber while maintaining proper layer formation through controlled solution deposition
Solution Approach 2:
The patent employs a low-cost solution-based fabrication approach instead of expensive vacuum deposition equipment. The solution process using spin coating is a simpler, more economical method that achieves the required layer formation without the high capital and operational costs associated with multiple vacuum chambers
3Reliability
If four or more layers are used in the quantum dot light emitting element, then the device achieves proper charge transport, but the structure becomes complex and process time increases
Solution Approach 1:
The patent combines the quantum dot layer and charge transporting layer into a single integrated layer formed by one-step spin coating. This merging reduces the number of processing steps from multiple sequential depositions to a single operation, directly reducing process time while maintaining charge transport function through the co-deposition of functional materials
Solution Approach 2:
The patent incorporates charge transporting particles into the quantum dot layer during the same spin coating process, preparing the complete functional structure in advance. This preliminary action ensures proper charge transport is built into the layer structure from the beginning, eliminating the need for subsequent separate layer formations and reducing overall process time
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 approach reduces manufacturing costs and simplifies the process, improving yield and enabling the use of existing lines for liquid crystal display devices, while maintaining effective color presentation and brightness.
Implementation Method 1
Quantum dot (QD) is a semiconductor nanoparticle, with the quantum dot of a nanometer size emits a light when an electron of an unstable state is moving downward to a valence band from a conduction band. As a particle of the quantum dot is smaller, a light having a shorter wavelength is generated.
Implementation Method 2
The hole transporting layer 20 transports and injects holes to the quantum dots 31 of the quantum light emitting layer 30 from the anode 10. Similarly, electrons injected in the cathode 50 are transported and injected to the quantum dots 31 of the quantum light emitting layer 30 by the electron transporting layer 40.
Implementation Method 3
a quantum dot light emitting element which forms a quantum light emitting layer configured of charge transporting particles and quantum dots and a charge transporting layer in a solution process
Data Source
AI summary
The present invention relates to a quantum dot light emitting element which can form a quantum light emitting layer configured of charge transporting particles and quantum dots and a charge transporting layer in a solution process, to reduce process expense, and a method for manufacturing the same. The quantum dot light emitting element includes a substrate, an anode formed on the substrate, a quantum light emitting layer formed on the anode, the quantum light emitting layer having charge transporting particles and quantum dots mixed therein, and a cathode formed on the quantum light emitting layer.