Transparent metal oxide nanoparticle compositions, methods of manufacture thereof and articles comprising the same

Patent metadata

Field	Value
Publication number	US-9343202-B2
Application number	US-201313960955-A
Country	US
Kind code	B2
Filing date	Aug 7, 2013
Priority date	Aug 7, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Disclosed herein is a composition for making a thin film comprising a solvent; a plurality of particles; the particles being derived by reacting a metal salt with itself or with a ligand; where the metal salt forms metal oxides and/or metal hydroxides upon reacting with itself or with a ligand; and where the particles have a metal oxide content that is substantially greater than their metal hydroxide content when heated at a temperature of less than or equal to 200° C. Disclosed herein too is a method for making the composition.

First claim

The invention claimed is:

1. A composition for making a thin film comprising:
a solvent;
a plurality of particles; the particles being derived by reacting a metal salt with itself or with a ligand; where the metal salt forms metal oxides and metal hydroxides upon reacting with itself or with a ligand; and where the particles have a metal oxide content that is substantially greater than their metal hydroxide content when heated at a temperature of less than or equal to 200° C.,
wherein a thin film transistor comprising the thin film exhibits a field effect mobility of from 0.1 cm 2 /V −s to 0.5 cm 2 /V −s measured at 150° C. and of from 1 cm 2 /V −s to 2 cm 2 /V −s measured at 200° C.

2. The composition of claim 1 , wherein a molar ratio of metal oxide content to the metal hydroxide content is at least 1.2:1.

3. The composition of claim 1 , wherein a cation in the metal salt is zinc, tin, indium, gallium, titanium, niobium, tungsten, strontium, zirconium, or a combination comprising at least one of the foregoing cations.

4. The composition of claim 1 , wherein an anion in the metal salt is acetate (CH 3 COO—), carbonate (CO 3 2− ), chloride (Cl − ), citrate (HOC(COO − )(CH 2 COO − ) 2 , cyanide (C≡N − ), nitrate (NO 3 − ), nitrite (NO 2 − ), phosphate (PO 4 3− ), sulfate (SO 4 2− ), or a combination comprising at least one of the foregoing anions.

5. The composition of claim 1 , where the solvent solubilizes the metal salt.

6. The composition of claim 1 , further comprising a pH agent that controls the pH of the composition to be 8 to 12.

Assignees

• Univ California

Inventors

• Subramanian Vivek
• Volkman Steven K

Classifications

• C09D1/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• H01B13/0016

  for heat treatment · CPC title

• H01B1/08

  oxides · CPC title

• H01B13/0026 Primary

  Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal · CPC title