期刊
NANOSCALE RESEARCH LETTERS
卷 13, 期 -, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/s11671-018-2664-5
关键词
Two-dimensional Ruddlesden-Popper perovskite; Nanocrystal; One-pot synthesis; Quantum confinement effect
资金
- Ministry of Science and Technology of Taiwan [MOST 106-2113-M-029-006-MY2, MOST 106-2632-M-029-001]
- Tunghai University
In hybrid organic-inorganic and all-inorganic metal halide perovskite nanomaterials, two-dimensional (2D) Ruddlesden-Popper (RP) perovskites have become one of the most interesting materials because of tunable bandgaps varied with the layer thickness, effective modulation of the electron-hole confinement and high stability. Here, we report a one-pot synthesis of 2D RP perovskite (BA)(2)(MA)(n )- 1PbnX3n +1 (BA = 1-butylammonium, MA = methylammonium, X = Br or I) quantum dots (QDs) with an average size of 10 nm at room temperature. The (BA)(2)(MA)(n )- 1PbnBr3n +1 (Br series) QDs and (BA)(2)(MA)(n )- 1PbnI3n +1 (I series) QDs exhibited tunable emitting spectrum in the range of 410-523 nm and 527-761 nm, respectively, with full width at half maximum (FWHM) of 12-75 nm. The emission color was tuned by the ratio of MA and halide. The photoluminescence quantum yield of 2D perovskite QDs reached 48.6% with more thermodynamic stability in comparison with 3D MAPbX(3) QDs. Overall results indicated that developing a solution synthesis for 2D RP perovskite QDs with great optical properties paves the way toward future optoelectronic devices and perovskite quantum dot photovoltaics.
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