Highly Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Crosslinking Method

Guangru Li; Florencia Wisnivesky Rocca Rivarola; Nathaniel J L K Davis; Sai Bai; Tom C Jellicoe; Francisco de la Peña; Shaocong Hou; Caterina Ducati; Feng Gao; Richard H Friend; Neil C Greenham; Zhi-Kuang Tan

doi:10.1002/adma.201600064

Highly Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Crosslinking Method

Adv Mater. 2016 May;28(18):3528-34. doi: 10.1002/adma.201600064. Epub 2016 Mar 16.

Affiliations

¹ Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK.
² Department of Materials Science and Metallurgy, University of Cambridge, Charles Babbage Road, Cambridge, CB3 0FS, UK.
³ Biomolecular and Organic Electronics, IFM, Linköping University, Linköping, 58183, Sweden.
⁴ Department of Engineering, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0FA, UK.
⁵ Department of Chemistry, National University of Singapore, 3 Science Drive 3, S117543, Singapore.
⁶ Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, S117574, Singapore.

PMID: 26990965
DOI: 10.1002/adma.201600064

Abstract

The preparation of highly efficient perovskite nanocrystal light-emitting diodes is shown. A new trimethylaluminum vapor-based crosslinking method to render the nanocrystal films insoluble is applied. The resulting near-complete nanocrystal film coverage, coupled with the natural confinement of injected charges within the perovskite crystals, facilitates electron-hole capture and give rise to a remarkable electroluminescence yield of 5.7%.

Keywords: crosslinking; nanocrystal; passivation; perovskite light-emitting diodes.

Publication types

Research Support, Non-U.S. Gov't