Performance enhancement of dye-sensitized solar cell with a TiCl4-treated TiO2 compact layer

Jisuk Park, Myeongkyu Lee

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We here show that an effective blocking layer for dye-sensitized solar cells (DSSCs) can be formed by spin coating a commercial TiO2 paste onto a conducting glass substrate. The spin-coated TiO2 layer was made more compact than the main absorption layer by TiCl4 treatment. DSSCs employing a compact layer exhibited an average current density and an efficiency of 19.09 mA/cm2 and 9.10%, respectively, while 16.91 mA/cm2 and 8.33% were obtained from unblocked reference cells. The enhanced DSSC performance is attributed to the increased electron lifetime. Intensity-modulated photovoltage spectroscopy and open-circuit voltage decay analysis showed that a TiCl4-treated compact layer substantially suppresses the charge recombination at the TiO2/substrate interface, thereby increasing the electron lifetime.

Original languageEnglish
Pages (from-to)271-275
Number of pages5
JournalElectronic Materials Letters
Issue number2
Publication statusPublished - 2015 Mar 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials


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