Korea Institute of Science and Technology

Jong Baek Park

Sungmin Park

Sohyun Park

Hae Jung Son

A conjugated polymer that is an electron donor, that is soluble without aggregation, that is solution-coatable and is dryable at a temperature below 70&#xb0; C., that has an energy conversion efficiency of 7 % or more over an area of 5 cmor more, and that is composed of a repeating unit represented by Chemical Formula 1A below:  where x is a real number from 0.1 to 0.2; and n is an integer from 1 to 1,000. The conjugated polymer forms a uniform thin film over a large area of, for example, an organic solar cell, without a heat treatment due to superior solubility and crystallinity at low temperature and, thus, allows fabrication of an organic solar cell with high efficiency at a low temperature.

Conjugated polymer for a photoactive layer, a coating composition including the conjugated polymer, and an organic solar cell including the photoactive layer

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Seoul, South Korea

Jong Baek Park