Metalorganic Chemical Vapor Deposition of CdTe(133) Epilayers on Si(211) Substrates

Title
Metalorganic Chemical Vapor Deposition of CdTe(133) Epilayers on Si(211) Substrates
Authors
김광천김현재서상희M. CarmodyS. Sivananthan김진상
Keywords
Thin film; MOCVD; CdTe/Si; buffer layer; thermal cleaning
Issue Date
2010-07
Publisher
Journal of electronic materials
Citation
VOL 39, NO 7, 863-867
Abstract
Single-crystalline CdTe(133) films have been grown by metalorganic chemical vapor deposition on Si(211) substrates. We studied the effect of various growth parameters on the surface morphology and structural quality of CdTe films. Proper oxide removal from the Si substrate is considered to be the principal factor that influences both the morphology and epitaxial quality of the CdTe films. In order to obtain single-crystalline CdTe(133) films, a two-stage growth method was used, i.e., a low-temperature buffer layer step and a hightemperature growth step. Even when the low-temperature buffer layer shows polycrystalline structure, the overgrown layer shows single-crystalline structure. During the subsequent high-temperature growth, two-dimensional crystallites grow faster than other, randomly distributed crystallites in the buffer layer. This is because the capturing of adatoms by steps occurs more easily due to increased adatom mobility. From the viewpoint of crystallographic orientation, it is assumed that the surface structure of Si(211) consists of (111) terrace and (100) step planes with an interplanar angle of 54.8 . This surface structure may provide many preferable nucleation sites for adatoms compared with nominally flat Si(100) or (111) surfaces. The surface morphology of the resulting films shows macroscopic rectangular-shaped terrace&#8212; step structures that are considered to be a (111) terrace with two {112} step planes directed toward <110>.
URI
http://pubs.kist.re.kr/handle/201004/45571
ISSN
0361-5235
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE