Organic semiconducting-rubrene (5,6,11,12-tetraphenyltetracene) microplates (MPs) were transferred onto the surface of two-dimensional (2-D) inorganic semiconducting molybdenum disulfide (MoS2). The nanoscale photoluminescence (PL) characteristics of the 2-D hybrid layers of the rubrene/MoS2 were measured using a high-resolution laser confocal microscope (LCM). We observed that the LCM-PL spectra of the rubrene MPs vary drastically according to the thicknesses of the 2-D MoS2 layers. When the organic-rubrene MPs were transferred onto the relatively thin MoS2 layers, the LCM-PL intensities of the rubrene MPs considerably decreased, i.e., PL quenching, because of the photoinduced charge-transfer effect between the p-type rubrene and n-type MoS2 materials. However, the LCM-PL intensities of the organic-rubrene MPs were gradually enhanced with the increasing thicknesses of the MoS2 layers due to the dominance of the reflection of the thicker MoS2 layers whereby the PL quenching is overcome. The results can be used for the data-base to improve the performance of p-n junction photovoltaic devices and light-emitting field-effect transistors.m.
Bibliographical noteFunding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (No. 2015R1A2A2A01003805 ).
©2016 Elsevier B.V. All rights reserved.
Copyright 2016 Elsevier B.V., All rights reserved.
- Charge transfer
- Molybdenum disulfide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry