Dye-sensitized solar cells composed of photoactive composite photoelectrodes with enhanced solar energy conversion efficiency

Hong Ha Thi Vu, Timur Sh Atabaev, Ji Young Ahn, Nguyen Nang Dinh, Hyung Kook Kim, Yoon Hwae Hwang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Phosphor particles were introduced as a luminescent medium to improve the overall efficiency of dye sensitized solar cells (DSSCs). In the preparation process, TiO2 and phosphor particles were mixed to make photoelectrodes with bilayer (TiO2/mix), 3-layer (TiO2/mix/TiO2) and 4-layer (TiO2/mix/TiO2/mix) structures. The cell with the bilayer structure (TiO2/mix) after treating with TiCl4 solution showed the highest light-to-electric energy conversion efficiency (8.78%), which was ∼25.8% higher than that of a cell with a pure TiO2 layer under the same experimental conditions. The improvement in the energy conversion efficiency of DSSCs was attributed to phosphor enhanced incident light-harvesting via up- and down-conversion luminescence processes, resulting in an increase in the photocurrent.

Original languageEnglish
Pages (from-to)11130-11136
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number20
DOIs
Publication statusPublished - May 28 2015
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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