Proton Transfer-Driven Modification of 3D Hybrid Perovskites to Form Oriented 2D Ruddlesden-Popper Phases
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Original language | English |
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Article number | 2100114 |
Journal / Publication | Small Science |
Volume | 2 |
Issue number | 3 |
Online published | 23 Dec 2021 |
Publication status | Published - Mar 2022 |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85162127595&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(941caec9-92e8-4fa4-8338-d4208f370b0c).html |
Abstract
Herein, it is shown how a proton transfer process between the organic moiety in 3D methylammonium lead halide perovskite and the introduced aliphatic alkylamines provides the basis for a fabrication route toward hybrid 3D/2D perovskites and finally purely 2D Ruddlesden-Popper (RP) perovskite phases, predominantly the n = 1 phase. Five alkylamines with varying aliphatic chain lengths, such as butylamine, octylamine, dodecylamine, hexadecylamine, and octadecylamine as antisolvents in toluene, are used, which quickly protonate during the spin-coating deposition of thin perovskite films. Formation of hydrogen bonds between protonated alkylamines and lead halide slabs leads to mixed 3D/2D hybrid perovskites, where the ratio between the 3D and 2D phases can be adjusted by the concentration of the alkylamine containing antisolvents. Longer-chain aliphatic alkylamines (12 carbon atoms or greater) are most prone to slice 3D perovskite into layered perovskites with efficient green emission reaching up to 38% for their photoluminescence quantum yield in films. Above a certain concentration threshold, 3D perovskite can be completely modified into 2D RP perovskite phases with crystalline orientation parallel to the substrate. The introduced facile perovskite phase modification approach provides a convenient way toward different kinds of 2D RP metal halide perovskite films with attractive optical properties.
Research Area(s)
- aliphatic alkylamines, green emission, hybrid halide perovskites, proton transfer, Ruddlesden-Popper perovskite, TOTAL-ENERGY CALCULATIONS, ELASTIC BAND METHOD, (CNH2N+1NH3)(2)PBI4, TRANSITIONS, PASSIVATION, EFFICIENCY
Citation Format(s)
Proton Transfer-Driven Modification of 3D Hybrid Perovskites to Form Oriented 2D Ruddlesden-Popper Phases. / Duan, Zonghui; Na, Guangren; Wang, Shixun et al.
In: Small Science, Vol. 2, No. 3, 2100114, 03.2022.
In: Small Science, Vol. 2, No. 3, 2100114, 03.2022.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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