A Lead Iodide Perovskite Based on a Large Organic Cation for Solar Cell Applications

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
View graph of relations



Original languageEnglish
Pages (from-to)9941-9944
Journal / PublicationAngewandte Chemie - International Edition
Issue number31
Online published6 Jun 2018
Publication statusPublished - 26 Jul 2018


Methylammonium (CH3NH3 +) and formamidinium ((NH2)2CH+) based lead iodide perovskites are currently the two commonly used organic–inorganic lead iodide perovskites. There are still no alternative organic cations that can produce perovskites with band gaps spanning the visible spectrum (that is, <1.7 eV) for solar cell applications. Now, a new perovskite using large propane-1,3-diammonium cation (1,3-Pr(NH3)2 2+) with a chemical structure of (1,3-Pr(NH3)2)0.5PbI3 is demonstrated. X-ray diffraction (XRD) shows that the new perovskite exhibits a three-dimensional tetragonal phase. The band gap of the new perovskite is about 1.6 eV, which is desirable for photovoltaic applications. A (1,3-Pr(NH3)2)0.5PbI3 perovskite solar cell (PSC) yields a power conversion efficiency (PCE) of 5.1 %. More importantly, this perovskite is composed of a large hydrophobic cation that provides better moisture resistance compared to CH3NH3PbI3 perovskite.

Research Area(s)

  • ammonium, band gap, organic cations, perovskite solar cells, stability