Porphyrin adsorption and ligand exchange at the (110)-TiO2/organic liquid interface

被引：2

作者：

Goetz, Klaus ^{[1
,2
,3
]}

Stollberg, Isabella ^{[1
]}

Prihoda, Annemarie ^{[1
,2
,3
]}

Bertram, Florian ^{[4
]}

Metwalli, Ezzeldin ^{[1
]}

Zech, Tobias ^{[1
,2
,3
]}

Unruh, Tobias ^{[1
,2
,3
]}

机构：

[1] Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Crystallog & Struct Phys ICSP, Dept Phys, Staudtstr 3, D-91058 Erlangen, Germany

[2] Friedrich Alexander Univ Erlangen Nurnberg FAU, Ctr Nanoanal & Electron Microscopy CENEM, Cauerstr 3, D-91058 Erlangen, Germany

[3] Friedrich Alexander Univ Erlangen Nurnberg FAU, Interdisciplinary Ctr Nanostruct Films IZNF, Cauerstr 3, D-91058 Erlangen, Germany

[4] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

来源：

SURFACE SCIENCE | 2022年 / 721卷

关键词：

porphyrin; interface; X-ray reflectometry; functionalization; rutile; DESY; SOLAR-CELLS; TIO2; SURFACE; RUTILE; RECOMBINATION; REFINEMENT;

D O I：

10.1016/j.susc.2022.122066

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly efficient dye-sensitized solar cells (DSSCs) have been prepared on the basis of porphyrin dyes with significant success. Recent studies have demonstrated a correlation between the solar cell efficiency and the configuration of the adsorbed porphyrin molecules at the surface of the semiconducting support material. The preparation of dense self assembled monolayers (SAMs) of upright standing porphyrin molecules on TiO2 surfaces was achieved from toluene solutions only when using a molecular exchange reaction. Here, an exchange study of an oleic acid (OLA) SAM on a 110 TiO2 surface by porphyrin molecules is presented. The exchange reaction has been studied by ex-situ as well as in-situ X-ray reflectometry (XRR) measurements. It was found that an almost complete exchange of OLA with porphyrins can be achieved. With increasing coating times the orientation of the porphyrin molecules relative to the substrate surface changed from flat lying to upright standing.

引用

页数：8