Perovskite LED Polymer Doping Pinhole Reduction
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Solution Overview
Problem
Existing perovskite light-emitting diode devices suffer from poor film-forming properties and pinholes during the film-forming process, leading to higher leakage current and lower current efficiency.
Innovation Solution
A fabricating method for perovskite light-emitting diodes involves doping a polymer material into the perovskite material, specifically using a combination of organometallic and inorganic perovskite materials with polyimide as the polymer, to enhance film-forming properties and reduce pinholes, thereby improving luminescence and light-emitting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perovskite material is used to fabricate light-emitting diode, then luminescent properties and cost-effectiveness are improved, but film-forming properties deteriorate and pinholes form during the film-forming process
Solution Approach 1:
The patent introduces a polymer material as an intermediary component mixed with the perovskite material. This polymer acts as a binder that improves the film-forming properties and reduces pinhole formation, while the perovskite maintains its luminescent function. The composite structure allows both the perovskite's optical properties and the polymer's film-forming capabilities to work together.
Solution Approach 2:
The patent creates a composite material by combining perovskite particles with a polymer matrix. This composite approach allows the perovskite to provide luminescent properties while the polymer provides cohesive film-forming properties, eliminating the pinhole issues associated with pure perovskite films.
2Ease of manufacture
If perovskite material is used to fabricate light-emitting diode, then cost is reduced, but leakage current increases due to pinholes
Solution Approach 1:
The polymer material serves as an intermediary that fills the gaps and pinholes in the perovskite film structure. This eliminates the direct pathways for leakage current while maintaining the low-cost advantage of using perovskite materials, as the polymer addition is minimal and does not significantly increase manufacturing cost.
3Use of energy by moving object
If perovskite material is used to fabricate light-emitting diode, then optical absorption coefficient is improved, but current efficiency decreases due to pinholes
Solution Approach 1:
The composite structure of perovskite particles embedded in a polymer matrix maintains the high optical absorption coefficient of the perovskite while the polymer matrix provides a continuous phase that prevents pinhole formation. This eliminates energy loss pathways through pinholes, thereby improving current efficiency while preserving optical absorption 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 method results in a perovskite light-emitting diode with enhanced film-forming effects, reduced pinholes, and improved light-emitting performance, effectively addressing the limitations of existing technologies.
Implementation Method 1
forming a plurality of perovskite light-emitting layers on the plurality of hole transport layers in the plurality of openings respectively, and the perovskite light-emitting layer includes a perovskite material and a polymer material doped in the perovskite material
Implementation Method 2
perovskite materials have luminescent properties such as tunable emission wavelength and narrow emission spectrum
Implementation Method 3
perovskite materials have great potential in the fields of electroluminescence and display
Data Source
AI summary
The disclosure provides a perovskite light-emitting diode (LED). A perovskite light-emitting layer is fabricated by doping a suitable polymer material into the perovskite material. On one hand, the film-forming property of the perovskite material can be enhanced, and the pinholes in perovskite light-emitting layer are reduced and then the luminescence of perovskite LED can be enhanced; on the other hand, the physical properties of the inkjet ink of the perovskite light-emitting layer can be effectively adjusted to meet the needs of the inkjet printing process and to enhance the ink-jet printing effect of the perovskite light-emitting layer. The perovskite light-emitting layer has good film-forming effect and basically no pinhole. Therefore, the perovskite LED has a better light-emitting performance.