Journal
MATERIALS TODAY COMMUNICATIONS
Volume 26, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2021.102160
Keywords
Solar energy materials; Dye-sensitized solar cells; Semiconductors; Heterojunction; Counter electrode
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Funding
- National Key RAMP
- D Program of China [2017YFA0403600]
- Large Equipment Grants of Southeast University, China
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Researchers successfully prepared NiS2/MnS and MnS/NiS2 heterojunction films as counter electrodes, achieving a power conversion efficiency close to Pt film; the unique band gap structure of NiS2 and MnS in this heterojunction accelerates electron transport.
Transition metal sulfides are an important alternative to Pt in dye-sensitized solar cells (DSSCs) to lower the cost and improve the stability. In this letter, we deposited NiS2/MnS and MnS/NiS2 heterojunction films on FTO as the counter electrode (CE) by pulsed laser deposition (PLD) and vapor-phase sulfurization. The heterojunction CE of NiS2/MnS can achieve a power conversion efficiency of 6.44 %, which is close to that of the Pt CE (6.84 %). The unique band gap structure of NiS2 and MnS in this heterojunction can accelerate the transport of electrons in the CE to improve the ability of electro-catalysis. This makes the heterojunction film composed of two inexpensive transition metal sulfides an ideal substitute for Pt film.
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