p-Type conductivity of hexagonal boron nitride as a dielectrically tunable monolayer: modulation doping with magnesiumElectronic supplementary information (ESI) available. See DOI: 10.1039/c7nr08035b
Hexagonal boron nitride (h-BN) is the widest band gap 2D material (>6 eV), which has attracted extensive attention. For exploring potential applications in optoelectronic devices, electrical conductivity modulation (n or p type) is of extreme importance. Here, we report the achievement of a large...
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Abstract | Hexagonal boron nitride (h-BN) is the widest band gap 2D material (>6 eV), which has attracted extensive attention. For exploring potential applications in optoelectronic devices, electrical conductivity modulation (n or p type) is of extreme importance. Here, we report the achievement of a large-scale and high quality h-BN monolayer with p-type conductivity by modulation doping of Mg using a low pressure chemical vapor deposition method. A large-scale monolayer h-BN (>10 inches) was grown by using a wound Cu foil roll on a multi-prong quartz fork. Magnesium nitride is used as a dopant precursor in a separate line due to its appropriate melting point and decomposition temperature. Density functional theory calculations revealed that the acceptor level introduced by Mg is almost pinned into the valence band and the activated holes are highly delocalized into the surrounding h-BN lattices. The h-BN:Mg monolayer showed a p-type conductivity with a considerable surface current of over 12 μA and a hole density of 1.7 × 10
14
cm
−2
. The dielectrically tunable h-BN monolayer makes the fabrication of advanced 2D optoelectronic devices in short wavelength possible.
p-Type conductivity of hexagonal boron nitride has been achieved as a dielectrically tunable monolayer by modulation doping with Mg. |
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AbstractList | Hexagonal boron nitride (h-BN) is the widest band gap 2D material (>6 eV), which has attracted extensive attention. For exploring potential applications in optoelectronic devices, electrical conductivity modulation (n or p type) is of extreme importance. Here, we report the achievement of a large-scale and high quality h-BN monolayer with p-type conductivity by modulation doping of Mg using a low pressure chemical vapor deposition method. A large-scale monolayer h-BN (>10 inches) was grown by using a wound Cu foil roll on a multi-prong quartz fork. Magnesium nitride is used as a dopant precursor in a separate line due to its appropriate melting point and decomposition temperature. Density functional theory calculations revealed that the acceptor level introduced by Mg is almost pinned into the valence band and the activated holes are highly delocalized into the surrounding h-BN lattices. The h-BN:Mg monolayer showed a p-type conductivity with a considerable surface current of over 12 μA and a hole density of 1.7 × 10
14
cm
−2
. The dielectrically tunable h-BN monolayer makes the fabrication of advanced 2D optoelectronic devices in short wavelength possible.
p-Type conductivity of hexagonal boron nitride has been achieved as a dielectrically tunable monolayer by modulation doping with Mg. |
Author | Hao, Zhuoran Cai, Duanjun Hong, Qiming Liu, Guozhen Liu, Chuan Chen, Xiaohong Sun, Feipeng Wu, Chenping Kang, Junyong Lu, Shiqiang Huang, Shengrong |
AuthorAffiliation | Department of Chemistry State Key Laboratory of Physical Chemistry of Solid Surfaces Duke University Fujian Key Laboratory of Semiconductor Materials and Applications CI Center for OSED Xiamen University College of Chemistry and Chemical Engineering Xiamen Top-succeed Electronics Technology Co. Ltd College of Physical Science and Technology |
AuthorAffiliation_xml | – name: Xiamen Top-succeed Electronics Technology Co. Ltd – name: Fujian Key Laboratory of Semiconductor Materials and Applications – name: Duke University – name: Department of Chemistry – name: College of Chemistry and Chemical Engineering – name: State Key Laboratory of Physical Chemistry of Solid Surfaces – name: College of Physical Science and Technology – name: Xiamen University – name: CI Center for OSED |
Author_xml | – sequence: 1 givenname: Feipeng surname: Sun fullname: Sun, Feipeng – sequence: 2 givenname: Zhuoran surname: Hao fullname: Hao, Zhuoran – sequence: 3 givenname: Guozhen surname: Liu fullname: Liu, Guozhen – sequence: 4 givenname: Chenping surname: Wu fullname: Wu, Chenping – sequence: 5 givenname: Shiqiang surname: Lu fullname: Lu, Shiqiang – sequence: 6 givenname: Shengrong surname: Huang fullname: Huang, Shengrong – sequence: 7 givenname: Chuan surname: Liu fullname: Liu, Chuan – sequence: 8 givenname: Qiming surname: Hong fullname: Hong, Qiming – sequence: 9 givenname: Xiaohong surname: Chen fullname: Chen, Xiaohong – sequence: 10 givenname: Duanjun surname: Cai fullname: Cai, Duanjun – sequence: 11 givenname: Junyong surname: Kang fullname: Kang, Junyong |
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