Metal-free perovskite film and metal-free perovskite piezoelectric nanogenerators

Patent metadata

Field	Value
Publication number	US-2024040933-A1
Application number	US-202218070769-A
Country	US
Kind code	A1
Filing date	Nov 29, 2022
Priority date	Jul 26, 2022
Publication date	Feb 1, 2024
Grant date	—

Abstract

The present invention discloses a metal-free perovskite film and metal-free perovskite piezoelectric nanogenerators comprising the film. The metal-free perovskite film is organic, lead-free and metal-free. The open-circuit voltage of the metal-free perovskite piezoelectric nanogenerators can reach 9˜16 V and the short-circuit current of the metal-free perovskite piezoelectric nanogenerators can reach 38˜55 nA. Also, the metal-free perovskite piezoelectric nanogenerators can be used as self-powered strain sensor of human-machine interface application and be adopted in in vitro electrical stimulation devices.

First claim

What is claimed is:

1 . A metal-free perovskite film characterized in that:
formula of the metal-free perovskite is ABX 3 , wherein A is MDABCO 2+ ; B is ammonium cation; X is halide anion; and the metal-free perovskite is free from lead.

2 . The metal-free perovskite film of claim 1 , wherein the halide anion is chloride ion, bromide ion, or iodide ion.

3 . The metal-free perovskite film of claim 1 , wherein the film is prepared with metal-free perovskite precursor with a concentration of 0.25M˜1M;
and preheating temperature for substrate in the range of room temperature to 140° C.

4 . The metal-free perovskite film of claim 1 , wherein the film has a piezoelectric constant of 1˜179 pm/V and a remnant polarization of 1˜22 μC/cm 2 ,

5 . A metal-free perovskite piezoelectric nanogenerator characterized by comprising the metal-free perovskite film of claim 1 .

6 . The metal-free perovskite piezoelectric nanogenerator of claim 5 , further comprising: electrodes, piezoelectric material layers.

7 . The metal-free perovskite piezoelectric nanogenerator of claim 5 , wherein the nanogenerator has an open-circuit voltage of 9˜16 V.

8 . The metal-free perovskite piezoelectric nanogenerator of claim 5 , wherein the nanogenerator has a short-circuit current of 38˜55 nA.

Assignees

• Univ Nat Central
• Univ Nat Taiwan Science & Technology

Inventors

• Yang Po-Kang
• Tsai Meng-Lin
• Wu han-song
• Wei Shih-Min
• Huang Shih-Min

Classifications

• H01L41/187 Primary

  Electricity · mapped topic

• H01L41/1138

  Electricity · mapped topic

• H01L41/0973

  Electricity · mapped topic

• H01L41/083

  Electricity · mapped topic

• H10N30/853 Primary

  Ceramic compositions · CPC title