Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141116
Title: Extended absorption window and improved stability of cesium-based triple-cation perovskite solar cells passivated with perfluorinated organics
Authors: Salim, K. M. Muhammed
Koh, Teck Ming
Bahulayan, Damodaran
Harikesh, Padinhare Cholakkal
Nur Fadilah Jamaludin
Febriansyah, Benny
Bruno, Annalisa
Mhaisalkar, Subodh
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2018
Source: Salim, K. M. M., Koh, T. M., Bahulayan, D., Harikesh, P. C., Nur Fadilah Jamaludin, Febriansyah, B., . . . Mathews, N. (2018). Extended absorption window and improved stability of cesium-based triple-cation perovskite solar cells passivated with perfluorinated organics. ACS Energy Letters, 3(5), 1068-1076. doi:10.1021/acsenergylett.8b00328
Journal: ACS Energy Letters
Abstract: Despite the high-quality films achieved with triplecation perovskites, the deviation from an optimized band gap by virtue of Shockley-Queisser estimation signifies consequential light absorption losses in this system. Herein, it is shown that, by passivating the perovskite surface with a hydrophobic fluorinated organic salt, namely, pentafluoropropylamonium iodide (PFPAI), not only is the band gap narrowed but the process also contributes toward the modulation of surface and electronic properties of the resulting film. The cumulative effect of these factors promotes the enhancement in the power conversion efficiency (PCE) and moisture stability of the perovskite solar cells (PSCs) fabricated with the PFPAI-passivated films. Suppression of surface defects and mitigation of interfacial charge recombination in the treated film are in good agreement with the longer photoluminescence (PL) decay lifetime observed. The PFPAI-passivated PSC afforded a PCE of 16.6% with good ambient stability, evidenced by minimal change in the normalized PCE on storage in a relative humidity (RH) environment of 55% over a period exceeding 169 days.
URI: https://hdl.handle.net/10356/141116
ISSN: 2380-8195
DOI: 10.1021/acsenergylett.8b00328
Schools: School of Materials Science and Engineering 
School of Physical and Mathematical Sciences 
Interdisciplinary Graduate School (IGS) 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsenergylett.8b00328
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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