Novel Integration of Nickel Phthalocyanine/Nickel Oxide-Based Photocathodes and Copper-Encapsulated Carbon-Dot-Cosensitized Photoanodes in Tandem for a Highly Efficient Solar Cell

Kolay, Ankita and Ghosal, Partha and Deepa, Melepurath (2020) Novel Integration of Nickel Phthalocyanine/Nickel Oxide-Based Photocathodes and Copper-Encapsulated Carbon-Dot-Cosensitized Photoanodes in Tandem for a Highly Efficient Solar Cell. ACS Sustainable Chemistry & Engineering, 8 (23). pp. 8593-8603. ISSN 2168-0485

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Abstract

A notable strategy to achieve a dramatically high power conversion efficiency (PCE) of 9.76% for a tandem photovoltaic device has been implemented by the use of a nickel phthalocyanine-tetrasulfonic acid tetrasodium salt (NiPcTs) dye-sensitized p-type nickel oxide (NiO) semiconductor-based photocathode supported over carbon (C)-fabric paired with a photoanode scaffold comprising luminescent and conducting core/shell copper@carbon dots (Cu@C-dots) anchored to cadmium sulfide (CdS) quantum dots tethered to n-type titanium oxide (TiO2). The PCE yielded for the n-type quantum dot-sensitized solar cell (n-QDSC) or photoanode-based half-cell (TiO2/CdS/Cu@C-dots-nS2-/Sn2-C-fabric) is 6.82% with a significant contribution from the light-harvesting capability of the plasmonic Cu core encased within the C-dot shell. In spite of the long-wavelength light-harvesting NiPcTs enabling easier reduction of the polysulfide electrolyte because of the additional photoexcited charge transfer, the p-type solar cell (p-SC) or photocathode-based half-cell (NiO/NiPcTs-nS2-/Sn2-C-fabric) delivers a relatively lower PCE of 0.039%, but on coassembling the p- and n-half solar cells in a tandem design (TiO2/CdS/Cu@C-dots-nS2-/Sn2-NiPcTs/NiO/C-fabric) the cell efficiency gets an immense boost under 1 sun illumination in consequence of the maximized range of light absorption afforded by CdS-Cu@C-dots on one side and NiPcTs on the other. This work rationalizes the synergism between the photoanode and photocathode elaborately to obtain a hitherto unmatched solar energy conversion in tandem solar cells.

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IITH Creators:

IITH Creators	ORCiD
M, Deepa	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Cadmium sulfide; Cadmium sulfide solar cells; Carbon; Charge transfer; Copper; Copper compounds; Dye-sensitized solar cells; Energy conversion; Field emission cathodes; II-VI semiconductors; Light absorption; Magnetic semiconductors; Nanocrystals; Oxide minerals; Photocathodes; Polyelectrolytes; Semiconductor quantum dots; Solar energy; Sulfur compounds; Titanium dioxide

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

17 Jul 2021 04:58

Last Modified:

14 Mar 2022 06:46

URI:

http://raiithold.iith.ac.in/id/eprint/8383