Atomically thin two-dimensional organic-inorganic hybrid perovskites

Letian Dou; Andrew B Wong; Yi Yu; Minliang Lai; Nikolay Kornienko; Samuel W Eaton; Anthony Fu; Connor G Bischak; Jie Ma; Tina Ding; Naomi S Ginsberg; Lin-Wang Wang; A Paul Alivisatos; Peidong Yang

doi:10.1126/science.aac7660

Atomically thin two-dimensional organic-inorganic hybrid perovskites

Science. 2015 Sep 25;349(6255):1518-21. doi: 10.1126/science.aac7660.

Authors

Affiliations

¹ Department of Chemistry, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
² Department of Chemistry, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
³ Department of Chemistry, University of California, Berkeley, CA 94720, USA.
⁴ Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁵ Department of Chemistry, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Department of Physics, University of California, Berkeley, CA 94720, USA. Kavli Energy NanoScience Institute, Berkeley, CA 94720, USA. Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁶ Department of Chemistry, University of California, Berkeley, CA 94720, USA. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Kavli Energy NanoScience Institute, Berkeley, CA 94720, USA. Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA.

PMID: 26404831
DOI: 10.1126/science.aac7660

Abstract

Organic-inorganic hybrid perovskites, which have proved to be promising semiconductor materials for photovoltaic applications, have been made into atomically thin two-dimensional (2D) sheets. We report the solution-phase growth of single- and few-unit-cell-thick single-crystalline 2D hybrid perovskites of (C4H9NH3)2PbBr4 with well-defined square shape and large size. In contrast to other 2D materials, the hybrid perovskite sheets exhibit an unusual structural relaxation, and this structural change leads to a band gap shift as compared to the bulk crystal. The high-quality 2D crystals exhibit efficient photoluminescence, and color tuning could be achieved by changing sheet thickness as well as composition via the synthesis of related materials.

Publication types

Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Grants and funding

S10-RR027172/RR/NCRR NIH HHS/United States