A new carbazole-based hole-transporting material with low dopant content for perovskite solar cells. (20th August 2016)

• Record Type: Journal Article
• Authors: Wang, Jiang; Chen, Yu; Li, Fusheng; Zong, Xueping; Guo, Jinlin; Sun, Zhe; Xue, Song
• Is Part Of: Electrochimica acta. Volume 210(2016)
• Page Start: 673
• Page End: 680
• Publication Date: 2016-08-20
• Subjects: Carbazole -- Hole-transporting material -- Perovskite solar cells -- Dopant -- Carbon counter electrode; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.05.203
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: A carbazole-based hole-transporting material was synthesized via a facile route. This new material with low-content dopant makes device display best performance. The optimized doping concentration of 4-tert-butylpyridine was 120 mM. Abstract: A new carbazole-based hole-transporting material incorporating a 3, 3′-biphenyl central core has been synthesized via a facile route. A reference compound without carbazole moiety was also prepared. Their geometric structures, thermal stability and photovoltaic properties were investigated. This new carbazole-based material exhibits a high glass transition temperature (167.8 °C) and a suitable highest occupied molecular orbital level well-matched with CH3 NH3 PbI3 perovskite. A low doping content of 4-tert-butylpyridine (120 mM) is observed for the best performance of perovskite solar cell in conjunction with a carbon counter electrode. The device achieves a power conversion efficiency of 4.53% under illumination of 100 mW cm −2 . The performance is much better than that of the reference compound (0.19%), and comparable to that of spiro-OMeTAD at the same dopant level (5.10%). The results indicate the carbazole-based material is a promising class of hole-transporting materials for perovskite solar cells.