We report on the structural and optical properties of 6,13-pentacenequinone film deposited on n-Si by thermal evaporation at room temperature. According to X-ray diffraction, films were found to have good crystallinity and also to have two crystalline phases mixed. Photoluminescence (PL) spectra exhibited double peaks at 1.97 and 2.09 eV while the corresponding (double) peaks related to highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) transition were observed from direct absorption spectra at 2.94 and 3.11 eV. The PL intensity was very strong under a UV illumination. It also seems that such a large Stokes shift as ∼1 eV exist in this organic crystal system. Au/organic/n-Si structures using 6,13-pentacenequinone films on n-Si showed rectifying behavior but with a relatively high level of leakage current due to many traps in the organic film.
|Number of pages||4|
|Journal||Applied Surface Science|
|Publication status||Published - 2005 May 15|
|Event||12th International Conference on Solid Films and Surfaces - Hammatsu, Japan|
Duration: 2004 Jun 21 → 2004 Jun 25
Bibliographical noteFunding Information:
The authors are very appreciative of the financial support from KISTEP (program no. M1-0214-00-0228), and they also acknowledge the support from Brain Korea 21 Program.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films