Exfoliation of self-assembled 2D organic-inorganic perovskite semiconductors

被引：127

作者：

Niu, Wendy ^{[1
]}

Eiden, Anna ^{[2
]}

Prakash, G. Vijaya ^{[3
]}

Baumberg, Jeremy J. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, NanoPhoton Ctr, Cambridge CB3 0HE, England

[2] Univ Cambridge, Dept Engn, Cambridge Graphene Ctr, Cambridge CB3 0FA, England

[3] Indian Inst Technol Delhi, Dept Phys, Nanophoton Lab, New Delhi 110016, India

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 17期

基金：

英国工程与自然科学研究理事会;

关键词：

OPTICAL-PROPERTIES; SOLAR-CELLS; EXCITONS; PHOTOLUMINESCENCE;

D O I：

10.1063/1.4874846

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：4

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