Spectrally-Narrowed Emissions from Organic Transistors Composed of Layered Crystals Laminated on a Two-Dimensional Diffraction Grating (Spectral Narrowing from Organic Crystal Transistors)

Abstract

We observed current-injected spectrally narrowed emissions (SNEs) from a light-emitting field-effect transistor (LEFET) characterized by both layered organic semiconductor crystals and a two-dimensional (2D) diffraction grating. The grating fabricated using nanoimprint lithography had circular air holes forming a triangular lattice. We laminated the p- and n-type crystals in this order on the grating and deposited heterogeneous metal drain and source electrodes. The several SNE peaks were definitively observed when we applied square-wave alternating-current voltages to the gate contact.

Keywords:

• Current-injected spectrally-narrowed emission
• organic light-emitting field-effect transistor
• two-dimensional diffraction grating
• organic crystal
• organic layered structure
• photonic crystal

Acknowledgements

This work was supported by Grants-in-Aid for Science Research (B) and (C) from the Ministry of Education, Culture, Sports, Science and Technology, Japan. This work was also supported in part by the Mazda Foundation. The authors thank SCIVAX Corporation for preparing the 2D gratings on the substrate. Thanks are also due to Dr. Kazunobu Kojima for discussions on the light propagation within the PC.