期刊
NANO LETTERS
卷 17, 期 5, 页码 2765-2770出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b04781
关键词
Formamidinium; perovskite nanocrystals; optoelectronics; photoluminescence; ligand-assisted reprecipitation
类别
资金
- Bavaria on the Move initiative of the state of Bavaria
- Bavaria Research Foundation (BFS) [1006-11]
- Cluster of Excellence Engineering of Advanced Materials at the University Erlangen-Nurnberg
- Federal Ministry for Economic Affairs and Energy (MNPQ program BMWI) [11/12]
- Joint Project Helmholtz-Institute Erlangen Nurnberg (HI-ERN) [DBF01253]
- Colombian Agency COLCIENCIAS
- DFG through research training group [1896]
It 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)(2)PbX3, (X = Cl; Br, I, or mixed Cl/Br and. Br/I) Colldidal natiocrystals by ligand-assisted reprecipitation (LARD). The cubic and platelet-like nanocrystals with their emission in the range of 415=740 nm, full width at half-maximum (fwhm) of 2044 nm, and radiative lifetimes of 5-166 ns enable band gap tuning by halide composition as well as by their thickness tailoring; they have 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 photo detector based on FAPbI(3) nanocrystals paves the way for perovskite quantum dot photovoltaics.
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