Sensor device capable of measuring electric field strength of an external electric field and method for measuring external electric field
A sensor device capable of measuring electric field strength of an external electric field includes a first dielectric layer, a first atomic layer material film disposed on the first dielectric layer and including one or more atomic layers formed of a first material, a channel layer disposed on the first atomic layer material film, including a channel region, and including one or more atomic layers of graphene, a second atomic layer material film disposed on the channel layer and including one or more atomic layers formed of a second material, and a first electrode and second electrode disposed on the channel layer across the channel region in a manner facing each other, wherein the second atomic layer material film includes a first side and a second side, the first side being disposed on the channel layer and the portion of the second side opposite from the channel region being exposed to the outside, or a second dielectric layer being disposed on the second side and the portion on the side opposite from the channel region of the side of the second dielectric layer opposite from the second atomic layer material film being exposed to the outside.
1 . A sensor device capable of measuring electric field strength of an external electric field, and the sensor device comprises:
a first dielectric layer;
a first atomic layer material film disposed on the first dielectric layer and including one or more atomic layers formed of a first material;
a channel layer disposed on the first atomic layer material film, including a channel region, and including one or more atomic layers of graphene;
a second atomic layer material film disposed on the channel layer and including one or more atomic layers formed of a second material; and
a first electrode and second electrode disposed on the channel layer across the channel region in a manner facing each other,
wherein the second atomic layer material film includes a first side and a second side, the first side being disposed on the channel layer and a second dielectric layer being disposed above the second side and the portion on the side opposite from the channel region of the side of the second dielectric layer opposite from the second atomic layer material film being exposed to the outside.
2 . The sensor device according to claim 1 , wherein the first atomic layer material film includes 1 to 120 atomic layers formed of the first material.
3 . The sensor device according to claim 1 , wherein the second atomic layer material film includes 1 to 100 atomic layers formed of the second material.
4 . The sensor device according to claim 1 , wherein the first material or the second material is hexagonal boron nitride, molybdenum disulfide or tungsten disulfide.
5 . The sensor device according to claim 1 , wherein the channel layer includes 1 to 10 layers of graphene.
6 . A method for measuring an external electric field using a sensor device capable of measuring electric field strength of an external electric field, and the sensor device comprises:
a first dielectric layer;
a first atomic layer material film disposed on the first dielectric layer and including one or more atomic layers formed of a first material;
a channel layer disposed on the first atomic layer material film, including a channel region, and including one or more atomic layers of graphene;
a second atomic layer material film disposed on the channel layer and including one or more atomic layers formed of a second material; and
a first electrode and second electrode disposed on the channel layer across the channel region in a manner facing each other,
wherein the second atomic layer material film includes a first side and a second side, the first side being disposed on the channel layer and a second dielectric layer being disposed above the second side and the portion on the side opposite from the channel region of the side of the second dielectric layer opposite from the second atomic layer material film being exposed to the outside, the method comprising:
measuring a current value flowing between the first electrode and second electrode while the external electric field is being applied to the sensor device; and
determining electric field strength of the external electric field based on the current value.
7 . The method according to claim 6 , wherein the electric field strength is measured for an external electric field input from the side of the second dielectric layer opposite from the second atomic layer material film, or output from the side of the second dielectric layer opposite from the second atomic layer material film.