DataVXACS Applied Materials & InterfacesPaper
journal article·2026-02-11

Control of Spontaneous Orientation Polarization of Host Layers in Organic Light-Emitting Diodes

Gerardus N. Iswara Lestanto, Shunta Kakumachi, Youichi Tsuchiya, Hajime Nakanotani, Chin-Yiu Chan, Chihaya Adachi

ACS Applied Materials & Interfaces· Volume 18· Issue 5
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Source abstract

Abstract

Spontaneous orientation polarization (SOP), arising from the partial alignment of permanent dipole moments in organic thin films, is regarded as a crucial factor in enhancing the performance of organic optoelectronic devices. In this study, organic host materials, DPCzBN1, DPCzBN2, and DPCzBN3, were synthesized, and their SOP properties were analyzed. An unusual negative SOP was observed in the DPCzBN3 film, while its counterparts, DPCz, DPCzBN1, and DPCzBN2, showed positive SOP. Further, we found that doping emitter molecules into the DPCz derivatives had an adverse effect on negatively polarized SOP. This finding highlights the significant role of dipole–dipole interactions and glass transition temperature ( T g )-dependent molecular kinetic energy in determining SOP in codeposited films.
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Research context

Ceramics & glassesElectronic materials

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

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

Affiliations

Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka, Nishi, Fukuoka 819-0395, Japan

Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan

Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China

Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China

International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan

Funding

Japan Society for the Promotion of Science London · City University of Hong Kong

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