Temperature sensor and device

Patent metadata

Field	Value
Publication number	US-11976980-B2
Application number	US-202217979925-A
Country	US
Kind code	B2
Filing date	Nov 3, 2022
Priority date	Jan 28, 2022
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A temperature sensor includes a first electrode, second electrode, and a pyroelectric layer between the first electrode and the second electrode. The pyroelectric layer includes a ferroelectric polymer and an ionogel.

First claim

What is claimed is:

1. A temperature sensor, comprising:
a first electrode;
a second electrode; and
a pyroelectric layer between the first electrode and the second electrode, the pyroelectric layer including a ferroelectric polymer and an ionogel,
wherein the temperature sensor is configured to sense an absolute temperature based on the pyroelectric layer including both the ferroelectric polymer and the ionogel.

2. The temperature sensor of claim 1 , wherein
a Curie temperature of the ferroelectric polymer is about 60° C. to about 140° C.

3. The temperature sensor of claim 1 , wherein
the ferroelectric polymer comprises a fluorine-containing ferroelectric polymer.

4. The temperature sensor of claim 3 , wherein
the ferroelectric polymer is a homopolymer comprising a vinylidene fluoride structural unit, a copolymer comprising a vinylidene fluoride structural unit, or any combination thereof.

5. The temperature sensor of claim 4 , wherein
the ferroelectric polymer is a copolymer comprising the vinylidene fluoride structural unit and a trifluoroethylene structural unit.

6. The temperature sensor of claim 1 , wherein
the ionogel is a composite of a polymer matrix and an ionic liquid.

7. The temperature sensor of claim 6 , wherein
the ferroelectric polymer and the polymer matrix each comprise at least one same structural unit.

8. The temperature sensor of claim 7 , wherein
the at least one same structural unit of the ferroelectric polymer and the polymer matrix includes a vinylidene fluoride.

9. The temperature sensor of claim 6 , wherein
the ionic liquid is included in the ionogel in an amount of about 100 to 400 parts by weight based on 100 parts by weight of the polymer matrix in the ionogel.

10. The temperature sensor of claim 1 , wherein
the pyroelectric layer comprises a composite of the ferroelectric polymer and the ionogel.

11. The temperature sensor of claim 1 , wherein
the pyroelectric layer comprises
a first layer comprising the ferroelectric polymer, and
a second layer on one or opposite surfaces of the first layer, the second layer including the ionogel.

12. The temperature sensor of claim 11 , wherein
the ionogel is a composite of a matrix polymer and an ionic liquid, and
the ferroelectric polymer and the matrix polymer comprise a homopolymer, a copolymer, or any combination thereof, wherein the ferroelectric polymer and the matrix polymer are different polymers and each include a same vinylidene fluoride structural unit.

13. The temperature sensor of claim 12 , wherein
the ionic liquid comprises a cation comprising a lithium ion, pyridinium, imidazolium, pyrrolidinium, piperidinium, ammonium, phosphonium, sulfonium, a derivative thereof, or any combination thereof and an anion comprising a halogen ion, tetrafluoroborate, hexafluorophosphate, triflate, trifluoromethanesulfonyl, bis(trifluoromethanesulfonyl)imide, bis(fluorosulfonyl)imide, cyanoguanidine, a hydrogen sulfate ion, an ethyl sulfate, a derivative thereof, or any combination thereof.

14. The temperature sensor of claim 1 , wherein
the first electrode and the second electrode are stretchable electrodes.

15. The temperature sensor of claim 14 , wherein
each stretchable electrode of the stretchable electrodes comprises an elastomer and conductive nanostructures.

16. The temperature sensor of claim 1 , wherein
the temperature sensor is a self-powered sensor that is configured to generate a voltage according to a temperature change at the temperature sensor exclusively of any electrical power from any energy supply device that is external to the temperature sensor.

17. The temperature sensor of claim 1 , wherein
a temperature change rate with respect to a time sensed by the temperature sensor is lower than a temperature change rate of a temperature change of a measurement target, and
the temperature sensor is configured to cause a voltage output from the temperature sensor according to the temperature change of the measurement target to be delayed with respect to time.

18. A device comprising the temperature sensor of claim 1 .

19. The device of claim 18 , wherein the device is a wearable device.

Assignees

• Samsung Electronics Co Ltd
• Univ Yonsei Iacf

Inventors

• Park Jin-Woo
• Kim Seung-Rok
• Lee Soyeon
• Lee Ey-In

Classifications

• H10D64/033

  comprising ferroelectric layers · CPC title

• G01J5/35 Primary

  Electrical features thereof · CPC title

• G01J5/046

  Materials; Selection of thermal materials · CPC title

• G01K7/003 Primary

  using pyroelectric elements (radiation pyrometers G01J5/00) · CPC title

• G01J5/34

  using capacitors, e.g. pyroelectric capacitors · CPC title