121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-340
Subject Tuning Energy Levels of TAPC Derivatives and its Application to Perovskite Solar Cells as Hole Transporting Material
Authors Sunhee Lee, Won-Sik Han*
Department of Chemistry, Seoul Women's University, Korea
Abstract One of the most commonly used hole-transporting materials (HTMs) in organic light-emitting diodes (OLEDs) is 4,4′-Cyclohexylidenebis[N,N-bis(4-methylphenyl)benzenamine] (TAPC). Interestingly, however, there is few report about its application to solar cell devices which might be due to the unsuitable energy levels when it utilized in perovskite solar cells (PSCs). In this respect, we expect that their HOMO and LUMO levels would be tuned by replacing methyl groups of TAPC with electron-withdrawing or electron-donating groups and they can be used as HTM materials in PSCs. In this regard, a series of TAPC moieties was synthesized with various electron donating and electron withdrawing groups and their photophysical- and electrochemical properties were systematically investigated. Among the series compounds, the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of the methoxy substituted compound were −5.37 and −2.16 eV, respectively, which are sufficiently matched with the valance band level of CH3NH3PbI3 perovskite. Finally, they were used as HTM material in perovskite solar cell and their device performances were compared with its reference material, TAPC.
E-mail lshee5@naver.com