UV and visible photoconductivity of undoped diamond films: morphology and related electrical transport phenomena


Autoria(s): Pereira, L.; Pereira, E.; Gomes, Henrique L.
Data(s)

26/06/2015

26/06/2015

2000

Resumo

UV and visible photoconductivity and electrical features of undoped diamond thin films grown by microwave plasma-assisted chemical vapour deposition (MP-CVD) on silicon and copper substrates are studied. The results are correlated with morphology properties analysed by atomic force microscopy (AFM) and micro-Raman. The photoconductivity presents several bands from 1.8 to 3.8 eV that are dependent on the substrate used to grow the samples in spite of some common bands observed. The J-V curve tin DC) in samples grown on Si has a rectifier behaviour (Schottky emission) in opposition to the samples grown on Cu that have no rectification (SCLC conduction). With these results we can conclude that diamond based optoelectronic devices behaviour is controlled by two kinds of structural defects localized in microcrystal and in its boundaries. A general structure model for the optoelectronic behaviour is discussed. (C) 2000 Elsevier Science S.A. All rights reserved.

Identificador

0925-9635

AUT: HGO00803;

http://hdl.handle.net/10400.1/6598

https://dx.doi.org/10.1016/S0925-9635(00)00297-1

Idioma(s)

eng

Publicador

Elsevier Science

Relação

P-000-Z1X

Direitos

restrictedAccess

Tipo

article