Cross-linked Carrier Transport Layer for Quantum Dot Light-Emitting Substrates
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Solution Overview
Problem
Existing quantum dot light-emitting devices face issues such as imbalance in carrier transport rates, low device efficiency, and varying performance of monochromatic light-emitting devices due to lithography-based manufacturing.
Innovation Solution
Incorporation of cross-linked materials in the light-emitting devices, including a first carrier transport layer and an auxiliary layer generated by cross-linking hole transport materials and photosensitive materials, to enhance electron and hole transport balance and improve device stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lithography-based manufacturing is used for quantum dot light-emitting devices, then manufacturing precision can be improved, but device efficiency deteriorates due to imbalance in carrier transport rates
Solution Approach 1:
The patent changes the chemical composition parameters of the carrier transport layers by introducing cross-linked materials. Specifically, the hole transport layer uses cross-linked materials with adjusted molecular structures and cross-linking densities, which modifies carrier transport properties without affecting the lithography manufacturing process. This parameter change resolves the contradiction by improving device efficiency while maintaining manufacturing precision.
2Device complexity
If conventional carrier transport layers are used, then device complexity is reduced, but stability deteriorates due to varying performance of monochromatic light-emitting devices
Solution Approach 1:
The patent employs composite materials in the carrier transport layers by combining cross-linked materials with quantum dot light-emitting patterns. The hole transport layer comprises cross-linked materials that form a composite structure with the light-emitting pattern, providing enhanced stability and consistent performance across different monochromatic devices while maintaining relatively simple device architecture.
3Ease of manufacture
If standard materials are used in light-emitting devices, then ease of manufacture is improved, but luminous efficiency deteriorates due to low device efficiency
Solution Approach 1:
The patent substitutes conventional mechanical mixing and processing methods with photo-cross-linking technology. The cross-linked materials in the carrier transport layers are formed through light-induced cross-linking reactions, replacing traditional thermal or chemical processing methods. This substitution maintains ease of manufacture by using simple light exposure steps while dramatically improving luminous efficiency through enhanced carrier transport properties.
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 solution achieves balanced carrier transport and increased efficiency, particularly in quantum dot light-emitting devices, enhancing stability and performance across different monochromatic light-emitting devices.
Implementation Method 1
a material of the auxiliary layer is the same as the material of the hole transport layer, and the material of the auxiliary layer is a first cross-linked material, the first cross-linked material being generated by cross-linking of a hole transport material and a first photosensitive material under light radiation
Implementation Method 2
a material of the light-emitting pattern contained in the first light-emitting device includes a first cross-linked quantum dot material, the first cross-linked quantum dot material being generated by cross-linking a first quantum dot material and a second photosensitive material under light radiation
Implementation Method 3
Y represents a remaining structure of a first carrier transport material with a C-H bond removed, the C-H bond is used for undergoing a cross-linking reaction with a first photosensitive group of the first photosensitive material under light radiation
Data Source
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AI summary
A light-emitting substrate. The light-emitting substrate comprises: a substrate and a plurality of light-emitting devices, the plurality of light-emitting devices being arranged on the substrate. Each light-emitting device among the plurality of light-emitting devices comprises: a first electrode, a second electrode and a light-emitting pattern provided between the first electrode and the second electrode, the first electrode being closer to the substrate than the second electrode. The plurality of light-emitting devices comprise: at least one first light-emitting device. The at least one first light-emitting device comprises: a first carrier transport layer, the first carrier transport layer being arranged on the side of the light-emitting pattern comprised in the at least one first light-emitting device close to the substrate and being in contact with the light-emitting pattern comprised in the at least one first light-emitting device, and the material of at least one of the light-emitting pattern comprised in the at least one first light-emitting device and the first carrier transport layer comprising a cross-linking material.