PMID- 23403849
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20130729
LR  - 20130220
IS  - 1361-6528 (Electronic)
IS  - 0957-4484 (Linking)
VI  - 24
IP  - 9
DP  - 2013 Mar 8
TI  - Oxygen environmental and passivation effects on molybdenum disulfide field effect 
      transistors.
PG  - 095202
LID - 10.1088/0957-4484/24/9/095202 [doi]
AB  - We investigated the effects of passivation on the electrical characteristics of 
      molybdenum disulfide (MoS(2)) field effect transistors (FETs) under nitrogen, 
      vacuum, and oxygen environments. When the MoS(2) FETs were exposed to oxygen, the 
      on-current decreased and the threshold voltage shifted in the positive gate bias 
      direction as a result of electrons being trapped by the adsorbed oxygen at the 
      MoS(2) surface. In contrast, the electrical properties of the MoS(2) FETs changed 
      only slightly in the different environments when a passivation layer was created 
      using polymethyl methacrylate (PMMA). Specifically, the carrier concentration of 
      unpassivated devices was reduced to 6.5 x 10(15) cm(-2) in oxygen from 16.3 x 
      10(15) cm(-2) in nitrogen environment. However, in PMMA-passivated devices, the 
      carrier concentration remained nearly unchanged in the range of 1-3 x 10(15) 
      cm(-2) regardless of the environment. Our study suggests that surface passivation 
      is important for MoS(2)-based electronic devices.
FAU - Park, Woanseo
AU  - Park W
AD  - Department of Physics and Astronomy, Seoul National University, Gwanak-ro, 
      Gwanak-gu, Seoul 151-747, Korea.
FAU - Park, Juhun
AU  - Park J
FAU - Jang, Jingon
AU  - Jang J
FAU - Lee, Hyungwoo
AU  - Lee H
FAU - Jeong, Hyunhak
AU  - Jeong H
FAU - Cho, Kyungjune
AU  - Cho K
FAU - Hong, Seunghun
AU  - Hong S
FAU - Lee, Takhee
AU  - Lee T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130212
PL  - England
TA  - Nanotechnology
JT  - Nanotechnology
JID - 101241272
EDAT- 2013/02/14 06:00
MHDA- 2013/02/14 06:01
CRDT- 2013/02/14 06:00
PHST- 2013/02/14 06:00 [entrez]
PHST- 2013/02/14 06:00 [pubmed]
PHST- 2013/02/14 06:01 [medline]
AID - 10.1088/0957-4484/24/9/095202 [doi]
PST - ppublish
SO  - Nanotechnology. 2013 Mar 8;24(9):095202. doi: 10.1088/0957-4484/24/9/095202. Epub 
      2013 Feb 12.