Formation of efficient dye-sensitized solar cells by introducing an interfacial layer of long-range ordered mesoporous TiO2 thin film

Yong Joo Kim, Yoon Hee Lee, Mi Hyeon Lee, Hark Jin Kim, Jia Hong Pan, Goo Il Lim, Young S. Choi, Kyungkon Kim, Nam Gyu Park, Chongmu Lee, Wan In Lee

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Long-range ordered cubic mesoporous TiO2 films with 300 nm thickness were fabricated on fluorine-doped tin oxide (FTO) substrate by evaporation-induced self-assembly (EISA) process using F127 as a structure-directing agent. The prepared mesoporous TiO2 film (MeSo-TiO2) was applied as an interfacial layer between the nanocrystalline TiO2 film (NC-TiO2) and the FTO electrode in the dye-sensitized solar cell (DSSC). The introduction of MeSo-TiO 2 increased JSC from 12.3 to 14.5 mA/cm2, and Voc by 55 mV, whereas there was no appreciable change in the fill factor (FF). As a result, the photovoltaic conversion efficiency (η) was improved by 30.0% from 5.77% to 7.48%. Notably, introduction of MeSo-TiO 2 increased the transmittance of visible light through the FTO glass by 23% as a result of its excellent antireflective role. Thus the increased transmittance was a key factor in enhancing the photovoltaic conversion efficiency. In addition, the presence of interfacial Meso-TiO2 provided excellent adhesion between the FTO and main TiO2 layer, and suppressed the back-transport reaction by blocking direct contact between the electrolyte and FTO electrode.

Original languageEnglish
Pages (from-to)13225-13230
Number of pages6
JournalLangmuir
Volume24
Issue number22
DOIs
StatePublished - 18 Nov 2008

Fingerprint

Dive into the research topics of 'Formation of efficient dye-sensitized solar cells by introducing an interfacial layer of long-range ordered mesoporous TiO2 thin film'. Together they form a unique fingerprint.

Cite this