Abstract
An iodine-free solid-state dye-sensitized solar cell (ssDSSC) is reported here, with 6.8% energy conversion efficiency-one of the highest yet reported for N719 dye-as a result of enhanced light harvesting from the increased transmittance of an organized mesoporous TiO2 interfacial layer and the good hole conductivity of the solid-state-polymerized material. The organized mesoporous TiO2 (OM-TiO2) interfacial layer is prepared on large-area substrates by a sol-gel process, and is confirmed by scanning electron microscopy (SEM) and grazing incidence small-angle X-ray scattering (GISAXS). A 550-nm-thick OM-TiO2 film coated on fluorine-doped tin oxide (FTO) glass is highly transparent, resulting in transmittance increases of 8 and 4% compared to those of the bare FTO and conventional compact TiO2 film on FTO, respectively. The high cell performance is achieved through careful control of the electrode/hole transport material (HTM) and nanocrystalline TiO2/conductive glass interfaces, which affect the interfacial resistance of the cell. Furthermore, the transparent OM-TiO2 film, with its high porosity and good connectivity, exhibits improved cell performance due to increased transmittance in the visible light region, decreased interfacial resistance (Î
Original language | English |
---|---|
Pages (from-to) | 4633-4639 |
Number of pages | 7 |
Journal | Advanced Functional Materials |
Volume | 21 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2011 Dec 20 |
Bibliographical note
Funding Information:From the Department of Anaesthesia and General Intensive Care Medicine, University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria. Address correspondence to: Univ. Prof. Dr. Friedrich K. Pühringer. Phone: 43-512-504-4319; Fax: 43-512-504-2450; E-mail: friedrich.puehringer@uibk.ac.at This study was supported in part by a grant from Organon GesmbH, Division Organon Teknika, Vienna, Austria. This study has been presented in parts at the 73rd IARS Meeting in Los Angeles, California, in March 12-16, 1999. Accepted for publication January 16, 2000
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics