A Strategy to Design a Donor–π–Acceptor Polymeric Hole Conductor for an Efficient Perovskite Solar Cell. Issue 14 (21st May 2015)

• Record Type: Journal Article
• Authors: Kim, Guan‐Woo; Kim, Jinseck; Lee, Gang‐Young; Kang, Gyeongho; Lee, Jaechul; Park, Taiho
• Is Part Of: Advanced energy materials. Volume 5:Issue 14(2015:Jul.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2015-05-21
• Subjects: Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201500471
• Languages: English
• ISSNs: 1614-6832

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A strategy for developing a novel donor–π–acceptor conducting polymeric hole transport material (<bold>TTB–TTQ</bold>) 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 <italic>tert</italic>‐butylpyridine to <bold>TTB–TTQ</bold> results in a rough film surface with a fibril structure and improved charge transport. A perovskite solar cell with the highest power conversion efficiency (<italic>η</italic>) 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.</p> </abstract>