Efficient Visible Quasi-2D Perovskite Light-Emitting Diodes

Jinwoo Byun; Himchan Cho; Christoph Wolf; Mi Jang; Aditya Sadhanala; Richard H Friend; Hoichang Yang; Tae-Woo Lee

doi:10.1002/adma.201601369

Efficient Visible Quasi-2D Perovskite Light-Emitting Diodes

Adv Mater. 2016 Sep;28(34):7515-20. doi: 10.1002/adma.201601369. Epub 2016 Jun 23.

Authors

Jinwoo Byun¹, Himchan Cho¹, Christoph Wolf¹, Mi Jang², Aditya Sadhanala³, Richard H Friend³, Hoichang Yang², Tae-Woo Lee⁴

Affiliations

¹ Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk, 37673, Republic of Korea.
² Department of Applied Organic Materials Engineering, Inha University, Incheon, 22212, Republic of Korea.
³ Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
⁴ Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk, 37673, Republic of Korea. twlee@postech.ac.kr, sefaattin.tongay@asu.edu.

PMID: 27334788
DOI: 10.1002/adma.201601369

Abstract

Efficient quasi-2D-structure perovskite light-emitting diodes (4.90 cd A(-1) ) are demonstrated by mixing a 3D-structured perovskite material (methyl ammonium lead bromide) and a 2D-structured perovskite material (phenylethyl ammonium lead bromide), which can be ascribed to better film uniformity, enhanced exciton confinement, and reduced trap density.

Keywords: layered perovskites; mixed organic ammonium; organic/inorganic hybrid perovskites; organometal halide perovskites; phenylethyl ammonium (PEA) lead bromide.