Stark spectroscopy of CuPc organic semiconductor with a submicron metal-electrode grating
Abstract
The optical and electro-optical properties of organic copper phthalocyanine semiconductor (α- CuPc) have been investigated by Stark (electroabsorption) spectroscopy using a metal electrode grating with a submicron (0.88 μm) interelectrode distance. Differences between dipole moments (Δμ) and polarizabilities (Δα) in the excited and ground states of α-CuPc are measured for a nanoscale semiconductor film. It is concluded that the extremely high values of Δμ and Δα are in principle not parameters of individual α-CuPc molecules: they are determined by exciton effects specifically in the polycrystalline medium with a characteristic morphology of hyperfine films, which depends on the structure of the samples and their fabrication technology.
- Publication:
-
Optics and Spectroscopy
- Pub Date:
- February 2016
- DOI:
- 10.1134/S0030400X1602003X
- Bibcode:
- 2016OptSp.120..300B
- Keywords:
-
- Dipole Moment;
- Organic Semiconductor;
- Copper Phthalocyanine;
- Interdigital Electrode;
- Optical Density Curve