Method of making doped Alq3 nanostructures with enhanced photoluminescence

Patent metadata

Field	Value
Publication number	US-9862883-B2
Application number	US-201514746790-A
Country	US
Kind code	B2
Filing date	Jun 22, 2015
Priority date	Jun 22, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A method of making doped Alq 3 nanostructures with enhanced photoluminescence is provided. The method of making doped Alq 3 nanostructures with enhanced photoluminescence includes the steps of dissolving tris(8-hydroxyquinolinato)aluminum (Alq 3 ) and a metal in water to form a solution. The metal may be terbium (Tb), copper (Cu), silver (Ag), dysprosium (Dy) or europium (Eu), for example. The metal may be provided in a water soluble form, such as chlorides and nitrates thereof. The solution is then subjected to ultrasonic waves (i.e., a sonication bath) for a period of approximately 3 hours to approximately 4 hours. The solution is then dried at a temperature of approximately 50° C. for a period of approximately 8 hours to form a powder of Alq 3 doped with the metal. The powder is then formed into nanostructures of the Alq 3 doped with the metal.

First claim

We claim:

1. A method of making doped Alq 3 nanostructures with enhanced photoluminescence, comprising the steps of:
dissolving tris(8-hydroxyquinolinato)aluminum (Alq 3 ) and a metal in water to form a solution, wherein the metal is selected from the group consisting of dysprosium and europium:
sonicating the solution;
drying the solution to form a powder of Alq 3 doped with the metal; and
forming the powder into nanofibers of the Alq 3 doped with the metal by electrospinning.

2. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 1 , wherein the metal comprises dysprosium.

3. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 1 , wherein the step of sonicating the solution comprises sonicating the solution for approximately 3 to approximately 4 hours.

4. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 3 , wherein the solution has an Alq 3 to metal ratio of approximately 1 to 0.2 by weight.

5. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 4 , wherein the step of drying the solution to form the powder of Alq 3 doped with the metal comprises drying the solution at a temperature of approximately 50° C. for approximately 8 hours.

6. A method of making doped Alq 3 nanostructures with enhanced photoluminescence, comprising the steps of:
dissolving tris(8-hydroxyquinolinato)aluminum (Alq 3 ) and a metal in water to form a solution, wherein the metal is selected from the group consisting of dysprosium and europium;
sonicating the solution;
drying the solution to form a powder of Alq 3 doped with the metal; and
forming the powder into nanostructures of the Alq 3 doped with the metal.

7. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 6 , wherein the metal comprises dysprosium.

8. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 6 , wherein the step of sonicating the solution comprises sonicating the solution for approximately 3 to approximately 4 hours.

9. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 8 , wherein the solution has an Alq 3 to metal ratio of approximately 1 to 0.2 by weight.

10. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 9 , wherein the step of drying the solution to form the powder of Alq 3 doped with the metal comprises drying the solution at a temperature of approximately 50° C. for approximately 8 hours.

11. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 6 , wherein the step of forming the powder into nanostructures of the Alq 3 doped with the metal comprises physical vapor condensation.

12. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 6 , wherein the step of forming the powder into nanostructures of the Alq 3 doped with the metal comprises electrospinning.

13. A method of making doped Alq 3 nanostructures with enhanced photoluminescence, comprising the steps of:
dissolving tris(8-hydroxyquinolinato)aluminum (Alq 3 ) and a metal in water to form a first solution;
sonicating the first solution;
drying the first solution to form a first powder of Alq 3 doped with the metal;
dissolving the first powder and polyvinyl alcohol in water to form a second solution;
stirring the second solution; and
forming the second solution into nanofibers of the Alq 3 doped with the metal by electrospinning.

14. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 13 , wherein the step of dissolving the first powder and the polyvinyl alcohol in the water to form the second solution comprises dissolving the first powder and the polyvinyl alcohol in the water, wherein a ratio of the first powder to the polyvinyl alcohol in the second solution is approximately 0.2 to 1 by weight.

15. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 13 , wherein the step of stirring the second solution comprises stirring the second solution for approximately 4 hours.

16. The method of making doped Alq 3 nanostructures with enhanced photoluminescence as recited in claim 15 , wherein the step of stirring the second solution is performed at a temperature of approximately 80° C.

Assignees

• Univ King Abdulaziz

Inventors

• Salah Numan Abdullah
• Memic Adnan
• Al-Ghamdi Attieh A
• Algarni Sabah Eid
• Khan Zishan H

Classifications

• H01L51/0081

  Electricity · mapped topic

• D10B2101/00

  Inorganic fibres · CPC title

• C09K2211/1033

  with oxygen · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/186

  of the light metals other than alkali metals and alkaline earth metals, i.e. Be, Al or Mg · CPC title