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

Author

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

Subjects
ORGANIC light emitting diodes, SINGLE crystals, POLARIZATION (Electricity), COLOR, ELECTROLUMINESCENCE, PHOTOLUMINESCENCE
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. [ABSTRACT FROM AUTHOR]

Published
2015
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