Cost-effective liquid-junction solar devices with plasma-implanted Ni/TiN/CNF hierarchically structured nanofibers

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xu Han
  • Kuan-Chen Cheng
  • Shella Permatasari Santoso
  • Hsin-Hui Shen
  • Fahe Cao
  • Edward T. Yu
  • Hsien-Yi Hsu

Detail(s)

Original languageEnglish
Article number115167
Journal / PublicationJournal of Electroanalytical Chemistry
Volume887
Online published26 Mar 2021
Publication statusPublished - 15 Apr 2021

Abstract

Carbon-based conductive materials have been recognized as promising alternatives to noble metals as the electrode in optoelectronic devices. Herein, by utilizing energetic plasma ion implantation, Ni-doped TiN nanowire (NWs) modified graphitic carbon nanofibers (CNF) are designed and prepared as the candidates of the platinum (Pt) counter electrode for low-cost hybrid perovskite-based liquid-junction photoelectrochemical solar cells (LPSCs). Notably, the photoelectrochemical (PEC) response of p-Rb0.05FA0.95PbI3 based-LPSCs equipped with the Ni/TiN/CNF counter electrode is almost identical to that with a typical Pt counter electrode. From electrochemical investigations, i.e., electrochemical impedance spectroscopy (EIS), we observe that the CNF-based materials show a similar redox activity compared with the Pt counter electrode, indicating low charge-transfer resistance (Rct) and large capacitance (C). The LPSCs, with a configuration of p-Rb0.05FA0.95PbI3/BQ (2 mM), BQ•− (2 mM)/Ni/TiN/CNF-based counter electrode, exhibit an open-circuit photovoltage of 1.00 V and a short-circuit current density of 7.02 mA/cm2 under 100 mW/cm2 irradiation. The overall optical-to-electrical energy conversion efficiency is 5.06%. The PEC solar cell shows good stability for 5 h under irradiation. The CNF-based counter electrode enables potential applications, including but not limited to PEC solar devices, dye-sensitized solar cells (DSSCs), solar fuel devices and hydrogen evolution reaction.

Research Area(s)

  • Carbon materials, Counter electrode, Photoelectrochemistry

Citation Format(s)

Cost-effective liquid-junction solar devices with plasma-implanted Ni/TiN/CNF hierarchically structured nanofibers. / Liu, Rugeng; Peng, Xiang; Han, Xu; Mak, Chun Hong; Cheng, Kuan-Chen; Permatasari Santoso, Shella; Shen, Hsin-Hui; Ruan, Qingdong; Cao, Fahe; Yu, Edward T.; Chu, Paul K.; Hsu, Hsien-Yi.

In: Journal of Electroanalytical Chemistry, Vol. 887, 115167, 15.04.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review