A simple and dopant-free hole-transporting material based on (2-ethylhexyl)-9H-carbazole for efficient planar perovskite solar cells

A hole-transporting material (HTM) based on (2-ethylhexyl)-9H-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 an...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2017, Vol.5 (48), p.12752-12757
Main 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
Format: Article
Language:English
Subjects:
Energy conversion efficiency
Photoluminescence
Photovoltaic cells
Solar cells
Transporting
Online Access:Get full text
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Summary:A hole-transporting material (HTM) based on (2-ethylhexyl)-9H-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.
ISSN:2050-7526
2050-7534
DOI:10.1039/c7tc03683c