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A Strategy to Design a Donor?π?Acceptor Polymeric Hole Conductor for an Efficient Perovskite Solar Cell
Title of paper A Strategy to Design a Donor?π?Acceptor Polymeric Hole Conductor for an Efficient Perovskite Solar Cell
Author [박태호교수 연구실]
Publication in journal Advanced Energy Materials 5(14), p1500471 (July 2015)
Publication date 2015-07-22

 
[Abstract]
 
A strategy for developing a novel donor–π–acceptor conducting polymeric hole transport material (TTB–TTQ) based on thiophene and benzothiadiazole as an alternative to spiro-MeOTAD is reported. The resulting polymer is highly soluble in many organic solvents and exhibits excellent film formability. The addition of lithium bis(trifluoromethanesulfonyl) imide salt and tert-butylpyridine to TTB–TTQ results in a rough film surface with a fibril structure and improved charge transport. A perovskite solar cell with the highest power conversion efficiency (η) yet achieved in such cells, 14.1%, which is 22.6% greater than that of a device employing a spiro-MeOTAD is demonstrated. This strategy provides a novel approach to developing solar cell materials for efficient perovskite solar cells.
 
DOI: 10.1002/aenm.201500471