Organometallic Compound for Deep Blue Light Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light-emitting devices face challenges in achieving deep blue light emission with high durability, efficiency, and long lifespan, particularly in suppressing exciplex formation to induce short-wavelength emission.
Innovation Solution
An organometallic compound represented by Formula 1, incorporating nitrogen-heterocyclic carbene linked to pyridine, is used in the emission layer to strengthen the C—Pt bond, thereby inducing short-wavelength emission and suppressing exciplex formation, resulting in an electronic apparatus that emits deep blue light with improved durability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional emission layer materials are used, then device structure is simple, but exciplex formation occurs causing reduced emission wavelength and poor durability
Solution Approach 1:
The patent changes the chemical parameters of the emission layer by introducing a specific organometallic compound with nitrogen-heterocyclic carbene ligand containing pyridine group. This compound features a C-Pt bond with specific bond length and bond order parameters that prevent exciplex formation. The molecular structure parameters (Formula 1 with specific rings CY1-CY4, linkers L1-L3, and substituents R1-R6) are optimized to achieve short-wavelength emission while maintaining high durability and efficiency.
2Illumination intensity
If deep blue light emission is achieved, then emission wavelength is short, but durability and lifespan are reduced
Solution Approach 1:
The patent converts the potentially harmful exciplex formation into a beneficial design feature by using the specific organometallic compound whose molecular structure prevents exciplex formation. The C-Pt bond in the compound acts as a protective mechanism that eliminates the harmful exciplex pathway while enabling deep blue light emission at 430-475 nm, thereby achieving both short wavelength and long lifespan simultaneously.
3Reliability
If conventional emission materials are used, then manufacturing is simple, but emission efficiency and durability are poor
Solution Approach 1:
The patent employs a composite organometallic compound structure combining nitrogen-heterocyclic carbene ligand with pyridine group coordinated to a metal center (M = Pt, Pd, Au, Ni, Ag, or Cu). This composite molecular architecture (Formula 1 with specific cyclic groups CY1-CY4, linkers L1-L3, and substituents R1-R6) achieves high emission efficiency and durability while maintaining feasibility in conventional OLED manufacturing processes.
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 organometallic compound enables the production of electronic devices that emit deep blue light with a maximum emission wavelength in the range of 430 nm to 475 nm, offering high durability, excellent efficiency, and a long lifespan.
Implementation Method 1
Carriers, such as holes and electrons, may recombine in such an emission layer region to produce excitons. These excitons transition from an excited state to a ground state to generate light.
Data Source
AI summary
Embodiments provide an organometallic compound, a light-emitting device that includes the organometallic compound, and an electronic apparatus that includes the light-emitting device. The organometallic compound is represented by Formula 1, which is explained in the specification.