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Design and photovoltaic studies of W@TiO<sub>2</sub>/rGO nanocomposites with polymer gel electrolyte

Authors
Pawar, Prakash S.Koyale, Pramod A.Ghodake, Vijay S.Mulik, Swapnajit V.Kapdi, Yash G.Soni, Saurabh S.Mullani, Navaj B.Delekar, Sagar D.
Issue Date
Nov-2023
Publisher
ROYAL SOC CHEMISTRY
Citation
NEW JOURNAL OF CHEMISTRY
Indexed
SCIE
SCOPUS
Journal Title
NEW JOURNAL OF CHEMISTRY
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68999
DOI
10.1039/d3nj04205g
ISSN
1144-0546
1369-9261
Abstract
The present research endeavor is focused on designing tungsten(vi) ion-doped TiO2/rGO nanocomposites (TR NCs) via a single-step in situ wet chemical route for Co2+/Co3+-based PEO-PEG polymer gel electrolyte-assisted D-pi-A carbazole dye (SK3) sensitized solar cells (DSSCs). After the synthesis of the desired W@TiO2/rGO (WTR) NCs, their physicochemical (viz., optoelectrical, structural, morphological, electrochemical, etc.) properties are studied. BET reveals a higher surface area with improved pore volumes up to 344.04 m(2) g(-1) and 0.918 cm(3) g(-1), respectively, for W-0.020@Ti-0.980/rGO (WTR-2) NCs as compared to others. The doctor blade technique is deployed for depositing photoanodes. EIS and M-S analysis showed improved photogenerated charge transfer and a higher carrier density, respectively, for WTR-2 NCs. Thereafter, WTR-2 NCs were further sensitized with SK3 dye and sandwiched with a Pt-counter electrode for making DSSCs, and then photovoltaic performance was studied and compared to that of bare TiO2 NPs under an AM 1.5 solar simulator. The WTR-2 NC-based DSSCs exhibited the highest conversion efficiency (eta) of 6.95%, which is 3.7 and 5.2 times greater than that of TR NC-based (1.84%) and bare TiO2 NP-based (1.32%) DSSCs, respectively. Hence, the present investigation validates the effectual photovoltaic performance of the DSSCs comprising TiO2 NP-based hybrids and SK3 dye and the utilization of Co2+/Co3+-based PEO-PEG polymer gel electrolyte.
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