[Surface and interface analysis of PTCDA/ITO using X-ray photoelectron spectroscopy (XPS)].
X-ray photoelectron spectroscopy (XPS) of surface and interface of PTCDA/ITO in PTCDA/p-Si organic-on-inorganic photoelectric detector was investigated. From C1s fine spectrum we found that the binding energy of C atoms in perylene rings was 284.6 eV; and the binding energy of C atoms in acid radical was 288.7 eV; moreover, some C atoms were oxidized by O atoms from ITO. The binding energy of O atoms in C=O bonds and C-O-C bonds was 531.5 and 533.4 eV, respectively. At the interface, the peak of high binding energy in C1s spectrum disappeared, and the main peak shifted toward lower binding energy.
Ou
Gu-ping
GP
School of Physical Science and Technology, Lanzhou University, China.
Song
Zhen
Z
Gui
Wen-ming
WM
Zhang
Fu-jia
FJ