Energy harvester for electrostatic energy
AssigneeSamsung Electronics Co., Ltd.
InventorsSangwoo Kim, Keun Young Lee, Seongsu Kim, Juhyuck Lee
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Abstract
Provided is an electrostatic energy harvester Including a lower electrode; a ferroelectric material layer which is disposed on the lower electrode and formed of a poled ferroelectric material; a friction-charged body which is adapted to be repeatedly contacted with and separated from the ferroelectric material layer and has an electric susceptibility different from an electric susceptibility of the ferroelectric material layer; and an upper electrode provided on the friction-charged body.
Claims12
An energy harvester comprising:
- a lower electrode;
- a ferroelectric material layer which is disposed on the lower electrode and formed of a negatively poled ferroelectric material or a positively poled ferroelectric material;
- and
- a friction-charged body which is adapted to be repeatedly contacted and separated from the ferroelectric material layer, has an electric susceptibility different from an electric susceptibility of the ferroelectric material layer, and functions as an upper electrode to exchange electrons with the lower electrode,
- wherein the ferroelectric material layer is formed of the negatively poled ferroelectric material and has a negative charging property in relation to the friction-charged body, or
- wherein the ferroelectric material layer is formed of the positively poled ferroelectric material and has a positive charging property in relation to the friction-charged body.
An electronic device comprising an energy harvester,
- wherein the energy harvester comprises a lower electrode;
- a ferroelectric material layer which is disposed on the lower electrode and formed of a negatively poled ferroelectric material or a positively poled ferroelectric material;
- and a friction-charged body which is adapted to be repeatedly contacted and separated from the ferroelectric material layer, has an electric susceptibility different from an electric susceptibility of the ferroelectric material layer, and functions as an upper electrode to exchange electrons with the lower electrode,
- wherein the ferroelectric material layer is formed of the negatively poled ferroelectric material and has a negative charging property in relation to the friction-charged body, or
- wherein the ferroelectric material layer is formed of the positively poled ferroelectric material and has a positive charging property in relation to the friction-charged body.
A method of controlling a ferroelectric material layer and a friction-charged body of an energy harvester, the method comprising:
- applying a type of poling to the ferroelectric material layer based on charging characteristics of the ferroelectric material layer with respect to the friction-charged body;
- making contact between the ferroelectric material layer and the friction-charged body to flow electrons directly from the friction-charged body to the ferroelectric material layer;
- and
- separating the ferroelectric material layer from the friction-charged body to flow electrons out of a lower electrode through a wire connected to the friction-charged body,
- wherein the ferroelectric material layer is formed of a negatively poled ferroelectric material and has a negative charging property in relation to the friction-charged body, or
- wherein the ferroelectric material layer is formed of a positively poled ferroelectric material and has a positive charging property in relation to the friction-charged body.
Dependencies are inferred from the claim text.