# Effect of temperature on the stability of nickel sulfide reduced graphene oxide nanocomposite counter electrode in quantum dot-sensitized solar cells
> Kharboot L.H.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_105033429539
Jurnal / Konferensi: Journal of Materials Science Materials in Electronics
Tahun terbit: 2026
DOI: https://doi.org/10.1007/s10854-026-16855-3
ISSN: 09574522
Kuartil SJR: Q2
Citations: 0

## Authors
- Kharboot L.H.

## Abstract
Quantum dot-sensitized solar cells (QDSSCs) are equipped with counter electrodes (CEs) based on reduced graphene oxide (rGO) and nickel sulfide (NiS/rGO). A hydrothermal method performed at 150 °C with variable reaction times (5, 10, and 15 h) was used to synthesize NiS/rGO CEs and evaluate their electrocatalytic activity and stability by exposing them to varying conditions at 25, 40, 60, and 80 °C for 100 h. Electrochemical performance was assessed through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization. Results showed that NiS/rGO 5 h exhibited superior electrocatalytic activity, achieving a significantly higher current density. CV results showed that NiS/rGO 5 h generated the highest current density of 112.4 mA/cm2 at 80 °C (Pt = 8.1 mA/cm2), and lower charge-transfer resistance (Rct values, 3.6 Ω cm2 at 80 °C than (Pt = 674.4 Ω cm2). The high performance was attributed to the dominance of β-NiS phase. Additionally, the nanocomposites demonstrated strong mechanical adhesion and stability under prolonged exposure to elevated temperatures. This study highlights the potential of NiS/rGO nanocomposites as cost-effective and efficient alternatives to Pt for improved QDSSC performance.

## Keywords
- Materials science
- Graphene
- Nanocomposite
- Nickel sulfide
- Oxide
- Nickel oxide
- Chemical engineering
- Electrode
- Quantum dot
- Nickel
- Sulfide
- Auxiliary electrode
- Inorganic chemistry
- Graphene oxide paper
- Quantum dot solar cell
- Solar cell
- Graphene quantum dot
- Nanotechnology
- Carbon quantum dots
- Thermal stability
- Hybrid solar cell
- Graphene nanoribbons
- Quantum efficiency
- Lead sulfide
- Photovoltaic system

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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