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journal article·2018-02-01Open access

Magneto-electroluminescence effects in the single-layer organic light-emitting devices with macrocyclic aromatic hydrocarbons

S.-T. Pham, K. Ikemoto, K. Z. Suzuki, T. Izumi, H. Taka, H. Kita, S. Sato, H. Isobe, S. Mizukami

APL Materials· Volume 6· Issue 2
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Source abstract

Abstract

Magneto-electroluminescence (MEL) effects are observed in single-layer organic light-emitting devices (OLEDs) comprising only macrocyclic aromatic hydrocarbons (MAHs). The fluorescence devices were prepared using synthesized MAHs, namely, [n]cyclo-meta-phenylene ([n]CMP, n = 5, 6). The MEL ratio of the resulting OLED is 1%–2% in the spectral wavelength range of 400-500 nm, whereas it becomes negative (−1.5% to −2%) in the range from 650 to 700 nm. The possible physical origins of the sign change in the MEL are discussed. This wavelength-dependent sign change in the MEL ratio could be a unique function for future single-layer OLEDs capable of magnetic-field-induced color changes.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Synthesis and Properties of Aromatic Compounds

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

WPI Advanced Institute for Materials Research, Tohoku University 1 , Aoba-ku, Sendai 980-8577, Japan

JST, ERATO, Isobe Degenerate π-Integration Project 2 , Bunkyo-ku, Tokyo 113-0033, Japan

Department of Chemistry, Graduate School of Science, The University of Tokyo 3 , Bunkyo-ku, Tokyo 113-0033, Japan

Center for Spintronics Research Network, Tohoku University 4 , Aoba-ku, Sendai 980-8577, Japan

Konica Minolta 5 , Ishikawa-cho, Hachioji 192-8505, Japan

Funding

MEXT | Japan Society for the Promotion of Science · MEXT | JST | Exploratory Research for Advanced Technology

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