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Master's Dissertation
DOI
https://doi.org/10.11606/D.43.2008.tde-30032009-142130
Document
Author
Full name
Karina Carvalho Lopes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Matsuoka, Masao (President)
Leite, Luisa Maria Scolfaro
Oppenheim, Ivette Frida Cymbaum
Title in Portuguese
Fabricação e caracterização de filmes semicondutores de InN depositados com o método de deposição assistida por feixe de íons
Keywords in Portuguese
Filmes finos
Física da matéria condensada
Nitreto de Indio
Semicondutores
Abstract in Portuguese
Neste trabalho, analisamos as propriedades estruturais, morfológicas e óticas de filmes finos de nitreto de índio, depositados em diferentes tipos de substratos (Si , safira-C, safira-A, safira-R, GaN/ safira e vidro) pelo método de deposição as s i s t ida por feixe de elétrons com energia de íons entre 100 e 1180 eV. A temperatura de substrato durante o processo de deposição variou da temperatura ambiente (TA) à 450oC, e ARR( I/A) ,que é a razão do f luxo de íons incidentes no feixe de íons relativa ao f luxo de átomos de In evaporados , de 0,8 até 4,5. O crescimento de InN cristalino foi fortemente influenciado pela orientação cristalográfica do substrato e os filmes sobre safira-C, safira-A e GaN/ safira foram os que apresentaram maior cristalinidade. O melhor valor de energia de íons foi de 100 eV para a formação de InN cristalino e sua cristalinidade aumentou com o aumento da temperatura do substrato. Não observamos influências de ARR( I/A) sobre a cristalinidade de InN e os filmes preparados em TA sobre GaN/ safira apresentaram InN amorfo.
Title in English
Growth and caracterization of ImN semiconductor films by ion beam assisted deposition
Keywords in English
Condensed matter physics
Indium nitride
Semiconductors
Thin films
Abstract in English
In thi s work, we analyzed the structural , morphological and optical properties of thin indium nitride films grown on some types of subs t rate (Si , c-plane sapphire, a-plane sapphire, r -plane sapphire, GaN/ sapphire and glass ) by the ion beam as s is ted deposition method with ion energy of 100-1180 eV. The substrate temperature during deposition ranged from room temperature (RT) to 450oC and ARR ( I/A) , from 0.8 to 4.5. The growth of crystalline InN was strongly influenced by the crystallographic orientation of substrate and the films on c-plane sapphire, a-plane sapphire and GaN/ sapphire provided more favorable result s . The best value of ion energy was found to be 100 eV for the format ion of crystalline InN and this crystallization increased with increasing the substrate temperature. We found that influence of ARR( I/A) on the crystallization of InN was imperceptible and that the f ilm prepared at RT on the GaN/ sapphire was amorphous of InN.
 
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Publishing Date
2009-04-06
 
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