Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2347
Title: Strategies for optimizing the performance of carbazole thiophene appended unsymmetrical squaraine dyes for dye-sensitized solar cells
Authors: Suraj Soman
Rahim, M A
Lingamoorthy, S
Suresh, C H
Issue Date: 2015
Publisher: Royal Society of Chemistry
Citation: Physical Chemistry Chemical Physics 17(35):23095-23103; 2015
Abstract: Unsymmetrical squaraine dyes (CTSQ-1 and CTSQ-2) with carbazole thiophene donor units were synthesized, characterized and used as sensitizers in dye-sensitized solar cells (DSSCs). These squaraines exhibited intense absorption in the near IR-visible region of the solar spectrum both in solution and on TiO2 surface. The LUMO level of the parent sensitizer (CTSQ-2) was positioned at a potential much close to the conduction band of TiO2 resulting in lack of enough driving force for electron injection which was modulated by structurally changing the donor carbazole moiety (CTSQ-1), pushing the LUMO more positive thereby enhancing the driving force. Theoretical calculations were carried out in order to have a better understanding of the electron density distribution in CTSQ-1 and CTSQ-2. Electron injection dynamics in CTSQ-1 was studied in detail by changing the Li+ concentration and its effects on photovoltaic parameters were discussed with the help of JV, IPCE,lifetime and EIS measurements.
Appears in Collections:2015

Files in This Item:
File Description SizeFormat 
suraj soman-physical chemistry and chemical physics.pdf
  Restricted Access
2.24 MBAdobe PDFView/Open Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.