A simple and dopant-free hole-transporting material based on (2-ethylhexyl)-9H-carbazole for efficient planar perovskite solar cells. Issue 48 (30th November 2017)

• Record Type: Journal Article
• Authors: Zhang, J.; Xu, L. J.; Huang, P.; Zhou, Y.; Zhu, Y. Y.; Yuan, N. Y.; Ding, J. N.; Zhang, Z. G.; Li, Y. F.
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 48(2017)
• Page Start: 12752
• Page End: 12757
• Publication Date: 2017-11-30
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc03683c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Planar perovskite solar cells based on CMO as the HTM showed a high power conversion efficiency of 15.92%. Abstract : A hole-transporting material (HTM) based on (2-ethylhexyl)-9 H -carbazole as the core and N, N -di- p -methoxyphenylamine as the end group (CMO) has been designed. CMO with a simple structure can be synthesized by a one-step process in a high yield and it shows good solubility in solvents. Steady-state and time-resolved photoluminescence measurements show that CMO has significant charge extraction ability. Planar perovskite solar cells (pero-SCs) based on CMO as the HTM showed a high power conversion efficiency of 15.92%. For reference purposes, pero-SCs based on 2, 2′, 7, 7′-tetrakis( N, N -di- p -methoxyphenylamine)-9-9′-spirobifluorene (Spiro-OMeTAD) were fabricated and a PCE of 16.70% was reached. CMO is one of the simplest HTM materials reported, which shows a PCE comparable to that of Spiro-OMeTAD at the same time.