Valleytronics-Organic Phosphor for Heavy-Metal-Free OLEDs
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Solution Overview
Problem
Existing methods for producing phosphorescence in organic light-emitting diodes (OLEDs) are complex, costly, and toxic, relying on the heavy-atom effect which involves heavy metals.
Innovation Solution
A phosphor-fluorescent material is created by combining a valleytronics material, such as graphene or molybdenum disulfide, with a fluorescent organic material, utilizing a magnetic field to induce pure organic phosphorescence through the Zeeman effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy metals (iridium, platinum, osmium) are substituted into a molecule to produce phosphorescence through the heavy-atom effect, then phosphorescence with long light-emitting lifespan and high quantum efficiency is achieved, but the cost per unit increases and the process becomes complex and toxic
Solution Approach 1:
The invention extracts and eliminates the heavy metal component from the phosphorescence generation system. By removing the heavy metal atoms (iridium, platinum, osmium) that cause toxicity and process complexity, the patent achieves phosphorescence through an alternative mechanism involving organic molecules with nitrile groups and magnetic fields, thereby resolving the contradiction between phosphorescence performance and process complexity/toxicity
Solution Approach 2:
The invention substitutes the heavy-atom effect (a quantum mechanical effect requiring heavy metal atoms) with a magnetic field-induced mechanism. By using external magnetic fields to induce phosphorescence in organic molecules containing nitrile groups, the patent replaces the need for heavy metal substitution, thus eliminating the associated complexity and toxicity while maintaining phosphorescence functionality
2Temperature
If heavy metals (In, Ti, Sn, Pb, Sb, Bi) are used in an organic complex ligand-containing metal complex to form an organic electron layer with phosphorescent properties at room temperature, then phosphorescence is produced, but the process remains complex and toxic
Solution Approach 1:
The invention extracts and removes the toxic heavy metal components (In, Ti, Sn, Pb, Sb, Bi) from the phosphorescence system. By using organic molecules with nitrile groups that can generate phosphorescence through magnetic field induction without requiring heavy metal atoms, the patent eliminates toxicity while maintaining room temperature phosphorescence capability
Solution Approach 2:
The invention replaces expensive and toxic heavy metal complexes with simpler organic molecules containing nitrile groups. These organic molecules are more environmentally friendly, less toxic, and can be processed more easily, thus resolving the contradiction between achieving room temperature phosphorescence and avoiding toxic materials
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 allows for the production of pure organic phosphorescence in a low-cost, simple, and eco-friendly process, enabling color control and micro-second phosphorescence without the need for heavy metal substitution.
Implementation Method 1
A phosphorescent material including the fluorescent organic material may produce pure organic phosphorescence due to the Zeeman effect of the valleytronics material
Data Source
AI summary
Provided are a phosphorescent material including a valleytronics material and a fluorescent organic material and having improved phosphorescent characteristics, and a method of producing the same. Phosphorescence technology may be used that allows a pure fluorescent organic material to produce pure organic phosphorescence by using a magnetic field derived from a valleytronics material via a low-cost and simple eco-friendly process. In addition, it is possible to produce micro-second phosphorescence simply through the presence or absence of a valleytronics material without heavy metal substitution of a pure organic material, color control is possible, and the process is simple and safe because the process is based on a room-temperature solution process.