Modulating electron transfer dynamics at hybrid interfaces via self-assembled multilayers

Patent metadata

Field	Value
Publication number	US-10916381-B2
Application number	US-201515325788-A
Country	US
Kind code	B2
Filing date	Jul 14, 2015
Priority date	Jul 29, 2014
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

Forward and back electron transfer at molecule oxide interfaces are pivotal events in dye-sensitized solar cells, dye-sensitized photoelectrosynthesis cells and other applications. Disclosed herein are self-assembled multilayers as a strategy for manipulating electron transfer dynamics at these interfaces. The multilayer films are achieved by stepwise layering of bridging molecules, linking ions, and active molecule on an oxide surface. The formation of the proposed architecture is supported by ATR-IR and UV-Vis spectroscopy. Time-resolved emission and transient absorption establishes that the films exhibit an exponential decrease in electron transfer rate with increasing bridge length. The findings indicate that self-assembled multilayers offer a simple, straight forward and modular method for manipulating electron transfer dynamics at dye-oxide interfaces.

First claim

What is claimed is:

1. A multilayer structure having the following general structure (III):

wherein each A is a bridging molecule, and further wherein A consists of two or three of

2. The multilayer structure of claim 1 wherein the metal oxide is selected from the group consisting of SiO 2 , SnO 2 , TiO 2 , Nb 2 O 5 , SrTiO 3 , ZnO, Zn 2 SnO 4 , ZrO 2 , NiO, Ta-doped TiO 2 , Nb-doped TiO 2 , and any combination thereof.

3. A multilayer structure having the following general structure (IV):

wherein X is two or three.

4. The multilayer structure of claim 3 wherein the metal oxide is selected from the group consisting of SiO 2 , SnO 2 , TiO 2 , Nb 2 O 5 , SrTiO 3 , ZnO, Zn 2 SnO 4 , ZrO 2 , NiO, Ta-doped TiO 2 , Nb-doped TiO 2 , and any combination thereof.

Assignees

• Univ Florida State Res Found Inc

Inventors

• Hanson Kenneth
• Wang Jamie
• Banerjee Tanmay
• Ogunsolu Omotola

Classifications

• H01G9/2031

  comprising titanium oxide, e.g. TiO2 (H01G9/2036 takes precedence) · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H01G9/2036

  comprising mixed oxides, e.g. ZnO covered TiO2 particles · CPC title

• H01G9/2059 Primary

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title