Fractional structured molybdenum oxide catalyst as counter electrodes of all-solid-state fiber dye-sensitized solar cells

Drajad Satrio Utomo; Jae Ho Kim; Daseul Lee; Juyun Park; Yong-Cheol Kang; Yong Hyun Kim; Jin Woo Choi; Myungkwan Song

doi:10.1016/j.jcis.2020.10.003

Fractional structured molybdenum oxide catalyst as counter electrodes of all-solid-state fiber dye-sensitized solar cells

J Colloid Interface Sci. 2021 Feb 15:584:520-527. doi: 10.1016/j.jcis.2020.10.003. Epub 2020 Oct 12.

Authors

Drajad Satrio Utomo¹, Jae Ho Kim², Daseul Lee², Juyun Park³, Yong-Cheol Kang³, Yong Hyun Kim⁴, Jin Woo Choi⁵, Myungkwan Song⁶

Affiliations

¹ Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam 51508, Republic of Korea; Department of Display Engineering, Pukyong National University, 45 Yongso-Ro, Nam-gu, Busan 48513, Republic of Korea.
² Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam 51508, Republic of Korea.
³ Department of Chemistry, Pukyong National University, 45 Yongso-Ro, Nam-gu, Busan 48513, Republic of Korea.
⁴ Department of Display Engineering, Pukyong National University, 45 Yongso-Ro, Nam-gu, Busan 48513, Republic of Korea. Electronic address: yhkim113@pknu.ac.kr.
⁵ Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam 51508, Republic of Korea. Electronic address: jinwoo.choi@kims.re.kr.
⁶ Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam 51508, Republic of Korea. Electronic address: smk1017@kims.re.kr.

PMID: 33129161
DOI: 10.1016/j.jcis.2020.10.003

Abstract

A novel hierarchical solution-processed fractional structured molybdenum oxide (MoO₃) catalyst is fabricated from tricarbonyltris (propionitrile) molybdenum and used as the counter electrode of all-solid-state fiber-shaped dye-sensitized solar cells (S-FDSSC). The Tafel plot results and electrical impedance spectroscopy suggest that the use of the fractional structured MoO₃ catalyst enhances the efficiency of the reduction of I₃^- to 3I^- at the counter electrode/electrolyte interface. Because of the improvements of the short-current circuit and fill factor, the power conversion efficiency of the MoO₃-modified S-FDSSC improves by 60% compared with that of the reference S-FDSSC. In addition, because of the robust fractional structure of MoO₃, the MoO₃-modified S-FDSSC maintains 90% and 95% of efficiency after 350-fold bending and the incident light angle dependency test, respectively. At 65% humidity and at 65 °C, the power conversion efficiency of the MoO₃-modified device decreases by <20% after 350 h of storage, while that of the reference device drops by more than 70%.

Keywords: Catalyst; Counter electrode; Dye-sensitized solar cell; Fiber electronics; Molybdenum oxide.