New polymeric material brings companies one step closer to cheaper plastic solar cells and electronics

ResearchSEA
Aug 16, 2011

Scientists from Singapore’s Institute of Materials Research and Engineering (IMRE), an institute of the Agency for Science, Technology and Research (A*STAR) have created a new polymer with both high charge mobility and high power conversion efficiency for application in both plastic electronics and organic solar cells.

A single polymer that can be used in both new age plastic electronics as well as plastic solar cells could spell greater cost-savings and open up new design options for electronic and solar cell companies. A*STAR’s IMRE has developed a new polymer that not only produces a high charge mobility of 0.2 cm2/V.s, which is the same value achieved by commercially available semiconducting materials but also has a high solar power conversion efficiency of 6.3%. This makes IMRE’s polymer one of the few that has both these properties. In addition to this, polymers of the same class as IMRE’s, which are those that use thiophene and benzothiadiazole as the building blocks, could only achieve 2.2% power conversion.

“Current polymers are usually good in one aspect or another, either as a good conductor for use in electronics or endowed with high power conversion efficiency - but not both”, said IMRE Senior Scientist, Dr Chen Zhi Kuan, the principal researcher working on the polymers. “IMRE’s polymer functions not only as a good material to make electronic components, the same material can be used to convert sunlight to electricity efficiently”. The polymer can also be easily applied in roll-to-roll printing techniques which is similar to how newspapers are currently printed making it possible to manufacture large area-scale printed electronics and organic solar cells quickly and cheaply.

With IMRE’s polymer, manufacturers could save cost using just a single bulk resource for making both printed electronics and organic solar cells. The material could also possibly be used in designing new devices where both power harnessing and electronics are needed in a single component. An example of this would be chemical sensors based on organic thin-film transistors and powered by organic solar cells.
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