Intrinsic Polarization and Tunable Color of Electroluminescence from Organic Single Crystal-based Light-Emitting Devices

Ran Ding; Jing Feng; Wei Zhou; Xu-Lin Zhang; Hong-Hua Fang; Tong Yang; Hai-Yu Wang; Shu Hotta; Hong-Bo Sun

doi:10.1038/srep12445

Intrinsic Polarization and Tunable Color of Electroluminescence from Organic Single Crystal-based Light-Emitting Devices

Sci Rep. 2015 Jul 24:5:12445. doi: 10.1038/srep12445.

Authors

Ran Ding¹, Jing Feng¹, Wei Zhou¹, Xu-Lin Zhang¹, Hong-Hua Fang¹, Tong Yang², Hai-Yu Wang¹, Shu Hotta³, Hong-Bo Sun⁴

Affiliations

¹ State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People's Republic of China.
² Faculty of Engineering, Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
³ Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
⁴ 1] State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People's Republic of China [2] College of Physics, Jilin University, 119 Jiefang Road, Changchun, 130023, People's Republic of China.

Abstract

A single crystal-based organic light-emitting device (OLED) with intrinsically polarized and color-tunable electroluminescence (EL) has been demonstrated without any subsequent treatment. The polarization ratio of 5:1 for the transversal-electric (TE) and transversal-magnetic (TM) polarization at the emission peak of 575 nm, and 4.7:1 for the TM to TE polarization at the emission peak of 635 nm, respectively, have been obtained. The emitting color is tunable between yellow, yellow-green and orange by changing the polarization angle. The polarized EL and the polarization-induced color tunability can be attributed to the anisotropic microcavity formed by the BP3T crystal with uniaxial alignment of the molecules.

Publication types

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