Organic rare earth solid micelle, preparation method therefor, and method for increasing photoelectric conversion efficiency of solar battery

Patent metadata

Field	Value
Publication number	US-10604699-B2
Application number	US-201616068455-A
Country	US
Kind code	B2
Filing date	Aug 9, 2016
Priority date	Jan 6, 2016
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Provided are an organic rare-earth solid micelle, a preparation method therefor, and a method for increasing the photoelectric conversion efficiency of a solar battery. A small organic conjugated ligand is taken as a first ligand, an amphiphilic diblock polymer is taken as a second ligand, and the first ligand and the second ligand are mixed and doped with a rare-earth chloride solution, and self-assembled to form an organic rare-earth solid micelle, whereby the fluorescence emission intensity and the fluorescence efficiency of the rare-earth element are improved. Next, the prepared organic rare-earth solid micelle is spin coated on an ITO layer of a solar battery, to prepare a solar battery with the organic rare-earth solid micelle. Therefore the sunlight absorption of a cell is increased, and the photoelectric conversion efficiency is improved. The preparation process is simple, low in cost, high in photoelectric conversion efficiency, and environmentally friendly.

First claim

The invention claimed is:

1. A method for preparing an organic rare-earth solid micelle, comprising: taking a small organic conjugated ligand as a first ligand and an amphiphilic diblock polymer as a second ligand, mixing and doping the first ligand and the second ligand with a rare-earth chloride solution, and self-assembling to form an organic rare-earth solid micelle;
wherein the amphiphilic diblock polymer is polymethyl methacrylate-b-polyacrylic acid (PMMA-b-PAA),
the molar ratio of the small organic conjugated ligand:rare-earth chloride:amphiphilic diblock polymer is 3:1:1,
wherein the small organic conjugated ligand:rare-earth chloride:amphiphilic diblock polymer are subjected to complexation reaction for 5-10 hrs in an oil bath at 50-70° C., to obtain a solution of an organic rare-earth solid micelle that is a complex having a size of 10-20 nm.

2. The preparation method according to claim 1 , wherein the polymethyl methacrylate-b-polyacrylic acid (PMMA-b-PAA) useful as the amphiphilic diblock polymer is prepared through a process comprising: (1) weighing an amount of a reversible addition fragmentation chain transfer (RAFT) agent and an appropriate amount of an initiator, dissolving the RAFT agent and initiator in dioxane as a solvent, adding an amount of methyl methacrylate (MMA) monomer, and reacting for 8 hrs in an oil bath at 70° C. under a nitrogen atmosphere to obtain a first reaction solution; and washing the first reaction solution with petroleum ether, filtering with suction to obtain an upper solid, and drying the upper solid to obtain a first polymer; and (2) weighing an amount of the first polymer obtained in Step (1), adding an appropriate amount of an initiator, dissolving the first polymer and initiator in dioxane as a solvent, adding an amount of acrylic acid monomer when the first polymer is completely dissolved, and reacting for 6 hrs in an oil bath at 50° C. under a nitrogen atmosphere to obtain a second reaction solution; and washing the second reaction solution with petroleum ether to remove impurities and unreacted monomers, pouring an upper liquid to obtain a solid, and drying to obtain the amphiphilic diblock polymer (PMMA-b-PAA).

3. The preparation method according to claim 1 , wherein the rare-earth chloride solution comprises europium chloride, terbium chloride, thulium chloride or gadolinium chloride.

4. The preparation method according to claim 3 , wherein the small organic conjugated ligand is 2-thenoyltrifluoroacetone.

5. The preparation method according to claim 3 , wherein the small organic conjugated ligand is one of 1,10-o-phenanthroline, acetylacetone, salicylic acid, or dibenzoyl methane.

Assignees

• Univ Qingdao

Inventors

• Tang Jianguo
• Wang Die
• Shen Wenfei
• Wang Xinzhi
• Wang Yao
• Huang Linjun
• Liu Jixian
• Jiao Jiqing
• Wang Yanxin
• Wang Wei
• Zhang Xiaolin
• Bu Fanchen
• Wang Jing
• Song Yan
• Yang Huihui
• Xu Xingqin
• Belfiore Laurence A

Classifications

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C08F293/005

  using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent · CPC title

• C08F8/42 Primary

  Introducing metal atoms or metal-containing groups · CPC title

• C09K2211/1092

  containing sulfur as the only heteroatom · CPC title

• C09K2211/182

  of the rare earth metals, i.e. Sc, Y or lanthanide · CPC title