Abstract
Semiconducting molybdenum ditelluride (2H-MoTe2), a two-dimensional (2D) transition metal dichalcogenide, has attracted extensive research attention due to its favorable physical properties for future electronic devices, such as appropriate bandgap, ambipolar transport characteristic, and good chemical stability. The rational tuning of its electronic properties is a key point to achieve MoTe2-based complementary electronic and optoelectronic devices. Herein, we demonstrate the dynamic and effective control of the electronic properties of few-layer MoTe2, through the in situ surface modification with aluminum (Al) adatoms, with a view toward high-performance complementary inverter devices. MoTe2 is found to be significantly electron doped by Al, exhibiting a continuous transport transition from p-dominated ambipolar to n-type unipolar with enhanced electron mobility. Using a spatially controlled Al doping technique, both p- and n-channels are established on a single MoTe2 nanosheet, which gives complementary inverters with a record-high gain of ∼195, which stands out in the 2D family of materials due to the balanced p- and n-transport in Al-modified MoTe2. Our studies coupled with the tunable nature of in situ modification enable MoTe2 to be a promising candidate for high-performance complementary electronics.
| Original language | English |
|---|---|
| Pages (from-to) | 9464-9472 |
| Number of pages | 9 |
| Journal | ACS nano |
| Volume | 13 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 27 2019 |
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Keywords
- aluminum
- bandgap tuning
- complementary inverter
- electron doping
- MoTe
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Continuously Tuning Electronic Properties of Few-Layer Molybdenum Ditelluride with in Situ Aluminum Modification toward Ultrahigh Gain Complementary Inverters. / Qi, Dianyu; Han, Cheng; Rong, Ximing; Zhang, Xiu Wen; Chhowalla, Manish; Wee, Andrew T.S.; Zhang, Wenjing.
In: ACS nano, Vol. 13, No. 8, 27.08.2019, p. 9464-9472.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Continuously Tuning Electronic Properties of Few-Layer Molybdenum Ditelluride with in Situ Aluminum Modification toward Ultrahigh Gain Complementary Inverters
AU - Qi, Dianyu
AU - Han, Cheng
AU - Rong, Ximing
AU - Zhang, Xiu Wen
AU - Chhowalla, Manish
AU - Wee, Andrew T.S.
AU - Zhang, Wenjing
PY - 2019/8/27
Y1 - 2019/8/27
N2 - Semiconducting molybdenum ditelluride (2H-MoTe2), a two-dimensional (2D) transition metal dichalcogenide, has attracted extensive research attention due to its favorable physical properties for future electronic devices, such as appropriate bandgap, ambipolar transport characteristic, and good chemical stability. The rational tuning of its electronic properties is a key point to achieve MoTe2-based complementary electronic and optoelectronic devices. Herein, we demonstrate the dynamic and effective control of the electronic properties of few-layer MoTe2, through the in situ surface modification with aluminum (Al) adatoms, with a view toward high-performance complementary inverter devices. MoTe2 is found to be significantly electron doped by Al, exhibiting a continuous transport transition from p-dominated ambipolar to n-type unipolar with enhanced electron mobility. Using a spatially controlled Al doping technique, both p- and n-channels are established on a single MoTe2 nanosheet, which gives complementary inverters with a record-high gain of ∼195, which stands out in the 2D family of materials due to the balanced p- and n-transport in Al-modified MoTe2. Our studies coupled with the tunable nature of in situ modification enable MoTe2 to be a promising candidate for high-performance complementary electronics.
AB - Semiconducting molybdenum ditelluride (2H-MoTe2), a two-dimensional (2D) transition metal dichalcogenide, has attracted extensive research attention due to its favorable physical properties for future electronic devices, such as appropriate bandgap, ambipolar transport characteristic, and good chemical stability. The rational tuning of its electronic properties is a key point to achieve MoTe2-based complementary electronic and optoelectronic devices. Herein, we demonstrate the dynamic and effective control of the electronic properties of few-layer MoTe2, through the in situ surface modification with aluminum (Al) adatoms, with a view toward high-performance complementary inverter devices. MoTe2 is found to be significantly electron doped by Al, exhibiting a continuous transport transition from p-dominated ambipolar to n-type unipolar with enhanced electron mobility. Using a spatially controlled Al doping technique, both p- and n-channels are established on a single MoTe2 nanosheet, which gives complementary inverters with a record-high gain of ∼195, which stands out in the 2D family of materials due to the balanced p- and n-transport in Al-modified MoTe2. Our studies coupled with the tunable nature of in situ modification enable MoTe2 to be a promising candidate for high-performance complementary electronics.
KW - aluminum
KW - bandgap tuning
KW - complementary inverter
KW - electron doping
KW - MoTe
UR - http://www.scopus.com/inward/record.url?scp=85071713440&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071713440&partnerID=8YFLogxK
U2 - 10.1021/acsnano.9b04416
DO - 10.1021/acsnano.9b04416
M3 - Article
VL - 13
SP - 9464
EP - 9472
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 8
ER -