Phenanthroline Electron Transport Material for Longer-Life OLEDs
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Solution Overview
Problem
Existing organic light emitting diodes (OLEDs) face challenges in achieving sufficient electron transporting efficiency, leading to reduced emitting efficiency, lifespan, and higher driving voltage.
Innovation Solution
Incorporating an organic compound with a structure where a thiophene or furan moiety is combined to a phenanthroline moiety directly or through a linker, used in the electron transporting layer and/or n-type charge generation layer of the OLED, enhancing electron transport efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electron transporting materials are used in OLED, then the device can be manufactured with standard materials, but the electron transporting efficiency is insufficient leading to reduced emitting efficiency and lifespan
Solution Approach 1:
The patent modifies the molecular structure of electron transporting materials by changing chemical parameters - specifically incorporating heteroatom moieties (oxygen, sulfur, or nitrogen containing groups) into the molecular framework. This structural parameter change enhances electron transporting efficiency while improving emitting efficiency and lifespan of the OLED device
Solution Approach 2:
The patent creates composite molecular structures by combining different functional moieties (heteroatom containing groups with electron transporting capabilities) into unified molecular architectures. These composite materials exhibit synergistic effects that simultaneously improve electron transport, emitting efficiency, and device lifespan
2Ease of operation
If conventional electron transporting materials are used in OLED, then the material selection is straightforward, but the driving voltage remains high
Solution Approach 1:
The patent changes the electrical parameters of the electron transporting material through molecular structure modification. The heteroatom moieties alter the HOMO-LUMO energy levels and electron mobility, resulting in reduced driving voltage and lower power consumption for the OLED device
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 configuration results in increased emitting efficiency, extended lifespan, and lower driving voltage for the OLED and organic light emitting devices.
Implementation Method 1
the first electron transporting layer includes a first electron transporting material and is positioned between the first emitting material layer and the second electrode
Implementation Method 2
combining the electrons with the holes, generating an exciton, and transforming the exciton from an excited state to a ground state
Data Source
AI summary
The present disclosure relates to an organic compound of Formula, and an organic light emitting diode and an organic light emitting display device including the organic compound. In Formula, X is oxygen (O) or sulfur (S), and each of R1 to R4 is independently selected from the group consisting of deuterium, halogen, cyano, C1 to C10 alkyl group, C1 to C10 alkoxy group, C3 to C30 cycloalkyl group, C6 to C30 aryl group, C6 to C30 arylamino group, and C5 to C30 heteroaryl group, wherein each of L1 and L2 is independently selected from the group consisting of C6 to C30 arylene group and C5 to C30 heteroarylene group, and wherein each of a and b is independently 0 or 1, each of c and f is independently an integer of 0 to 3, and each of d and e is independently an integer of 0 to 2.