TY - JOUR

T1 - Characterization of conducting molecular films on silicon

AU - Komolov, A

AU - Schaumburg, K

AU - Moller, PJ

AU - Monakhov, A.K.

PY - 1999/4

Y1 - 1999/4

N2 - Complex analysis of atomic composition and surface structure of thin multilayer LB corbathiene (CRB) films and cast films of regio-regular head-to-tail coupled poly(3-dodecylthiophene) (PDDT) was performed using Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy and Atomic force microscopy (AFM) techniques. AES and XPS studies verified the film bulk and surface atomic composition expected from their chemical structure. AFM investigations showed the uniformity on micron scale of the surfaces of the films under study with roughness less than 5 nm and 10 nm for the LB and cast films, respectively. A pronounced photovoltage signal was observed in the structures composed of the films deposited on n-Si substrates and semitransparent Au layer deposited on top of the films. No significant photovoltage was observed in similar structures using p-Si substrates. The photovoltage values attained 0.5 V under monochromatic visible light irradiation of total energy density less than 0.1 mW cm(-2). The photovoltage spectral variation was monitored and related to the films and n-Si substrate optical absorption features. (C) 1999 Elsevier Science B.V. All rights reserved.

AB - Complex analysis of atomic composition and surface structure of thin multilayer LB corbathiene (CRB) films and cast films of regio-regular head-to-tail coupled poly(3-dodecylthiophene) (PDDT) was performed using Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy and Atomic force microscopy (AFM) techniques. AES and XPS studies verified the film bulk and surface atomic composition expected from their chemical structure. AFM investigations showed the uniformity on micron scale of the surfaces of the films under study with roughness less than 5 nm and 10 nm for the LB and cast films, respectively. A pronounced photovoltage signal was observed in the structures composed of the films deposited on n-Si substrates and semitransparent Au layer deposited on top of the films. No significant photovoltage was observed in similar structures using p-Si substrates. The photovoltage values attained 0.5 V under monochromatic visible light irradiation of total energy density less than 0.1 mW cm(-2). The photovoltage spectral variation was monitored and related to the films and n-Si substrate optical absorption features. (C) 1999 Elsevier Science B.V. All rights reserved.

KW - surface photovoltage spectroscopy

KW - photoconductivity

KW - silicon

KW - Langmuir-Blodgett films

KW - LANGMUIR-BLODGETT-FILMS

KW - POLYTHIOPHENE FILMS

KW - THIN POLYTHIOPHENE

KW - CORBATHIENE

KW - SUBSTRATE

M3 - статья

VL - 142

SP - 591

EP - 597

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

IS - 1-4

Y2 - 6 July 1998 through 10 July 1998

ER -