期刊
APPLIED PHYSICS LETTERS
卷 104, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4874846
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资金
- EPSRC [EP/G060649/1, EP/H027130/1, EU LINASS 320503]
- Engineering and Physical Sciences Research Council [EP/G060649/1, EP/H027130/1] Funding Source: researchfish
- EPSRC [EP/G060649/1, EP/H027130/1] Funding Source: UKRI
Ultra-thin flakes of 2D organic-inorganic perovskite (C6H9C2H4NH3)(2)PbI4 are produced using micromechanical exfoliation. Mono- and few-layer areas are identified using optical and atomic force microscopy, with an interlayer spacing of 1.6 nm. Refractive indices extracted from the optical spectra reveal a sample thickness dependence due to the charge transfer between organic and inorganic layers. These measurements demonstrate a clear difference in the exciton properties between bulk (>15 layers) and very thin (<8 layer) regions as a result of the structural rearrangement of organic molecules around the inorganic sheets. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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