Conjugated Polymer for Organic Electroluminescence

The patent applies parameter changes by precisely controlling the weight average molecular weight (20,000-1,000,000) and dispersity (2.00 or less) of the conjugated polymer. This specific parameter range resolves the contradiction by providing optimal balance between solubility (easier manufacture) and charge transportability (device reliability), avoiding both the crystallization issues of low molecular weight polymers and the processing difficulties of high molecular weight polymers.

The patent uses parameter changes by setting the weight average molecular weight to 20,000 or more and dispersity to 2.10 or less. This prevents crystallization of low molecular weight components while maintaining good solubility, thereby achieving both ease of manufacture and manufacturing precision in terms of film flatness.

The patent applies parameter changes by strictly controlling dispersity to 2.10 or less. This limitation prevents excessive low molecular weight components that would create charge traps and reduce drive life, while still maintaining adequate solubility for processing. The controlled dispersity ensures long-term device stability.

The patent resolves this contradiction through parameter changes by optimizing the weight average molecular weight to 20,000 or more. This ensures sufficient chain length for effective charge transport and high luminous efficiency, while the controlled dispersity maintains good depositability. The specific parameter range achieves both ease of manufacture and energy efficiency.