Hierarchically structured Zn2SnO4 nanobeads for high-efficiency dye-sensitized solar cells

Daesub Hwang, Jun Su Jin, Horim Lee, Hae Jin Kim, Heejae Chung, Dong Young Kim, Sung Yeon Jang, Dongho Kim

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38 Citations (Scopus)

Abstract

We developed a unique strategy for fabricating hierarchically structured (nanoparticles-in-beads) Zn2SnO4 beads (ZTO-Bs), which were then used to produce ternary metal oxide-based dye-sensitized solar cells (DSSCs). DSSCs were fabricated using the ZTO-Bs as the photoelectrodes and highly absorbable organic dyes as the sensitizers. The DSSCs based on the ZTO-Bs and the organic dyes (SJ-E1 and SJ-ET1) exhibited the highest performance ever reported for DSSCs with ternary metal oxide-based photoelectrodes. The optimized DSSCs exhibited a power conversion efficiency of 6.3% (VOC of 0.71 V, JSC of 12.2 mA cm-2, FF of 0.72), which was much higher than that for DSSCs with conventional ZTO-NPs-based photoelectrodes or those based on the popular ruthenium-based dye, N719. The unique morphology of the ZTO-Bs allowed for improvements in dye absorption, light scattering, electrolyte penetration, and the charge recombination lifetime, while the organic dyes resulted in high molar absorbability.

Original languageEnglish
Article number7353
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014

Bibliographical note

Funding Information:
The authors gratefully acknowledge support from the Basic Science Research Program of the National Research Foundation (NRF) of Korea (2012045675); the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), which is funded by the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20133030000210) (S.Y.J.); the Global Frontier R&D Program of the Center for Multiscale Energy System, funded by the NRF through the Ministry of Education, Science and Technology, Korea (2012-8-2018) (D.K.); and the KIST Institutional Programs (2E23900 and 2K02120) (D.Y.K.).

All Science Journal Classification (ASJC) codes

  • General

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