Details

Autor(en) / Beteiligte

• Dessimoz, Marc
• Yoo, So-Min
• Kanda, Hiroyuki
• Igci, Cansu
• Kim, Hobeom
• Nazeeruddin, Mohammad Khaja

Titel

Phase-Pure Quasi-2D Perovskite by Protonation of Neutral Amine

Ist Teil von

• The journal of physical chemistry letters, 2021-11, Vol.12 (46), p.11323-11329

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Phase control of low-dimensional metal-halide perovskites (LDPs) greatly affects their optoelectronic properties, and phase-pure LDPs are desirable to achieve efficient perovskite optoelectronic devices such as solar cells and light-emitting diodes. Herein, we introduce a method to obtain phase-pure LDP by using a neutral amine, cyclohexylmethyl amine (CHMA). The incorporation of CHMA into a formamidinium lead bromide (FAPbBr3) precursor solution leads to the protonation of the amine that allows the phase transition of 3D FAPbBr3 to phase-pure quasi-2D perovskite (n = 2). For comparison, cyclohexylmethylammonium bromide (CHMABr), which is a conventional form of ammonium halide salt with the same organic moiety to the amine, is used, which resulted in a 2D perovskite (n = 1). The perovskite films fabricated by the two different methodologies are characterized. This study paves the way for further research on the realization of phase-pure perovskites and their relevant optoelectronic devices.