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BUSINESS


Challenges make changes

BUSINESS

Challenges make changes
OLED
BIO
PATENT
Introduction
Technology overview
R&D
Process development
Production
Quality
The development process at SFC is broadly classified into (1) Idea generation and screening, (2) Synthesis,
(3) Sublimation, and (4) Evaluation and feedback, which may be further broken down into more steps.
Idea generation
This is a step to envision the candidate structures to be synthesized and review the possibility prior to entering synthesis. Therefore, in addition to experiences, know-how and patents, it is crucial to come up with free and challenging ideas unconstrained by existing concepts.
Once an idea based on a new concept is suggested, simulation may predict attainable basic physical properties such as HOMO/LUMO, wavelength, S1 and T1 and so on. Speed and accuracy are improving every day with drastic advancement of computing power and algorithms. Therefore simulation becomes an essential step in developing new materials.
Synthesis
Synthesis is performed on the candidate structures which had been screened through simulation. This process requires complex and sophisticated multi-steps, sometimes up to 10 or more. Therefore, long-term accumulated experiences and know-how are of utmost importance.
During synthesis, numerous analyses on structure, purity, and optical characteristics are performed, simultaneously.

(SFC BD3111)

Sublimation
OLED materials which have completed chemical processes such as chemical purification (crude) are further required to be purified through sublimation. By setting an appropriate gradient of temperature, the final product with a hyper-purity can be obtained at a certain area (collection zone).
Sublimation is known as an effective way to eliminate foreign materials (such as metal ions) which are generally difficult to be removed through conventional chemical processes like recrystallization. Conditions of the sublimation process and configuration of the equipment may vary depending on the characteristics of the material, process and economic consideration. As experience and technology build up efficiency and performance are quickly being improved. In general, a small-scale sublimator with small tubes (diameter of <100mm) is mainly used for R&D.
Performance evaluation
The performance of the hyper-pure material is finally confirmed by evaluating the test devices. IVL performance, quantum efficiency, color coordinates and lifetime may be the primary evaluation items.
However, technical advances and increase in customer needs are requiring a longer list including high-temperature lifetime, molecular orientation, impedance, and so on.
The performance of OLED devices is the aggregated result of diverse materials having specific roles, not of emitting layer materials only. Therefore, developing a new material involves simultaneous optimization in combination with other layer materials as well as process technologies, which stresses again the importance of evaluation and data analysis.
Device Solution Group at SFC is striving to give direction and to discover the best materials and combinations, by providing feedbacks for the idea generation and synthesis stages with the results of simulation, measurement, evaluation, and analysis.
Introduction
Technology overview
R&D
Process development
Production
Quality
The development process at SFC is broadly classified into (1) Idea generation and screening, (2) Synthesis, (3) Sublimation, and (4) Evaluation and feedback, which may be further broken down into more steps.
Idea generation
This is a step to envision the candidate structures to be synthesized and review the possibility prior to entering synthesis. Therefore, in addition to experiences, know-how and patents, it is crucial to come up with free and challenging ideas unconstrained by existing concepts.
Once an idea based on a new concept is suggested, simulation may predict attainable basic physical properties such as HOMO/LUMO, wavelength, S1 and T1 and so on. Speed and accuracy are improving every day with drastic advancement of computing power and algorithms. Therefore simulation becomes an essential step in developing new materials.
Synthesis
Synthesis is performed on the candidate structures which had been screened through simulation. This process requires complex and sophisticated multi-steps, sometimes up to 10 or more. Therefore, long-term accumulated experiences and know-how are of utmost importance. During synthesis, numerous analyses on structure, purity, and optical characteristics are performed, simultaneously.
(SFC BD3111 Molecular structure)
Sublimation
OLED materials which have completed chemical processes such as chemical purification (crude) are further required to be purified through sublimation. By setting an appropriate gradient of temperature, the final product with a hyper-purity can be obtained at a certain area (collection zone).
Sublimation is known as an effective way to eliminate foreign materials (such as metal ions) which are generally difficult to be removed through conventional chemical processes like recrystallization. Conditions of the sublimation process and configuration of the equipment may vary depending on the characteristics of the material, process and economic consideration. As experience and technology build up efficiency and performance are quickly being improved. In general, a small-scale sublimator with small tubes (diameter of <100mm) is mainly used for R&D.
Performance
evaluation
The performance of the hyper-pure material is finally confirmed by evaluating the test devices. IVL performance, quantum efficiency, color coordinates and lifetime may be the primary evaluation items.
However, technical advances and increase in customer needs are requiring a longer list including high-temperature lifetime, molecular orientation, impedance, and so on.
The performance of OLED devices is the aggregated result of diverse materials having specific roles, not of emitting layer materials only. Therefore, developing a new material involves simultaneous optimization in combination with other layer materials as well as process technologies, which stresses again the importance of evaluation and data analysis.
Device Solution Group at SFC is striving to give direction and to discover the best materials and combinations, by providing feedbacks for the idea generation and synthesis stages with the results of simulation, measurement, evaluation, and analysis.