Planar Light-Emitting Transistor Charge Buffer Layer Surface Emission
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Solution Overview
Problem
Conventional planar light-emitting transistors emit light in a linear or strip-shaped form, making it difficult to achieve stable surface light source emission suitable for display applications.
Innovation Solution
Incorporating a charge buffer layer under the source or drain electrode, or between the semiconductor charge transport layer and the light-emitting unit, to redistribute current density and enable uniform surface light source emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar light-emitting transistor is designed with conventional structure, then device processability and stability are improved, but light emission form becomes line source which is unsuitable for display applications
Solution Approach 1:
The invention transitions the light emission from a one-dimensional line source to a two-dimensional surface source by introducing a charge buffer layer that spreads charge carriers across the channel width, enabling surface light source emission suitable for display applications while maintaining planar device structure
2Shape
If a vertical light-emitting transistor is designed, then surface light source emission is easily realized, but a porous source electrode is required which is difficult to prepare and influences device stability and uniformity
Solution Approach 1:
Instead of adopting the vertical configuration that requires porous electrodes, the invention inverts the approach by using a planar configuration with a charge buffer layer to achieve surface light source emission, thereby avoiding the manufacturing difficulties of porous electrodes while maintaining the desired emission characteristics
3Device complexity
If electrons and holes are compounded on one side of a channel and electrode in a planar light-emitting transistor, then device structure is simple, but light emitting occurs in line source form which is unsuitable for display applications
Solution Approach 1:
The charge buffer layer acts as an intermediary between the charge carriers and the light-emitting materials, redistributing the charge carriers across the channel width to enable uniform surface light source emission without complicating the overall device structure
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 planar light-emitting transistor achieves stable surface light source emission with high aperture ratio, good gate tunability, and flexibility, suitable for wearable devices and display applications.
Implementation Method 1
the light-emitting transistor has the unique advantages of high integration level, simple preparation process and the like, and is considered as an important device element of the next-generation revolutionary display technology
Data Source
AI summary
A planar light-emitting transistor device capable of surface light source emission, and a preparation method therefor and an application thereof are provided. The planar light-emitting transistor device has a charge buffer layer inserted between a semiconductor charge transport layer and a light-emitting unit, such that a prepared planar light-emitting transistor can realize stable surface light source emission, thereby effectively overcoming the defect of the emergent light of a traditional planar light-emitting transistor being linear or strip-shaped. The planar light-emitting transistor device capable of surface light source emission has a high integration level, can realize stable surface light source emission, effectively improves the aperture ratio of the transistor device, has a good gate tunable capability, high loop stability and any tunability, and can be easily miniaturized.