title: Brightly Luminescent and Color-Tunable Formamidinium Lead Halide Perovskite FAPbX3(X = Cl, Br, I) Colloidal Nanocrystals.
abstract: In the past few years, hybrid organic-inorganic and all-inorganic metal halide perovskite nanocrystals have become one of the most interesting materials for optoelectronic applications. Here, we report a facile and rapid room temperature synthesis of 15-25 nm formamidinium CH(NH2)2PbX3(X = Cl, Br, I, or mixed Cl/Br and Br/I) colloidal nanocrystals by ligand-assisted reprecipitation (LARP). The cubic and platelet-like nanocrystals with their emission in the range of 415-740 nm, full width at half-maximum (fwhm) of 20-44 nm, and radiative lifetimes of 5-166 ns enable band gap tuning by halide composition as well as by their thickness tailoring; they have a high photoluminescence quantum yield (up to 85%), colloidal and thermodynamic stability. Combined with surface modification that prevents degradation by water, this nanocrystalline material is an ideal candidate for optoelectronic devices and applications. In addition, optoelectronic measurements verify that the photodetector based on FAPbI3nanocrystals paves the way for perovskite quantum dot photovoltaics.
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.|Energy Campus Nürnberg (EnCN) , Fürther Str. 250, 90429 Nürnberg, Germany.
authors.forename: Ievgen
authors.identifier: 0000-0003-0644-2283
authors.initials: I
authors.lastname: Levchuk
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.
authors.forename: Andres
authors.initials: A
authors.lastname: Osvet
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.|Erlangen Graduate School in Advanced Optical Technologies (SAOT) , Paul-Gordan-Str.6, 91052 Erlangen, Germany.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Tang
authors.affiliation: Chair for Crystallography and Structural Physics, Friedrich-Alexander-University Erlangen-Nürnberg , Staudtstrasse 3, 91058 Erlangen, Germany.
authors.forename: Marco
authors.initials: M
authors.lastname: Brandl
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.
authors.forename: José Darío
authors.initials: JD
authors.lastname: Perea
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Hoegl
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.
authors.forename: Gebhard J
authors.initials: GJ
authors.lastname: Matt
authors.affiliation: Chair for Crystallography and Structural Physics, Friedrich-Alexander-University Erlangen-Nürnberg , Staudtstrasse 3, 91058 Erlangen, Germany.
authors.forename: Rainer
authors.initials: R
authors.lastname: Hock
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.
authors.forename: Miroslaw
authors.initials: M
authors.lastname: Batentschuk
authors.affiliation: Friedrich-Alexander-Universitat Erlangen-Nurnberg , Materials for Electronics and Energy Technology (i-MEET), Martensstrasse 7, 91058 Erlangen, Germany.|Energy Campus Nürnberg (EnCN) , Fürther Str. 250, 90429 Nürnberg, Germany.|ZAE Bayern , Renewable Energies, Haberstr. 2a, 91058 Erlangen, Germany.|Erlangen Graduate School in Advanced Optical Technologies (SAOT) , Paul-Gordan-Str.6, 91052 Erlangen, Germany.
authors.forename: Christoph J
authors.initials: CJ
authors.lastname: Brabec
keywords: Formamidinium; ligand-assisted reprecipitation; optoelectronics; perovskite nanocrystals; photoluminescence