Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes
In an attempt to improve DSSCs efficiency, titanium dioxide (TiO2) hybrid photoanode materials exuding electrocatalytic and photoelectrocatalytic were incorporated into iron based metal organic frameworks (MOFs) derived from BTC = 1,3,5-Benzenetricarboxylic acid and Bismuth based polyoxometalates...
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Elsevier
2025-04-01
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| Series: | Chemistry of Inorganic Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949746925000011 |
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| author | William Moloto Pontsho Mbule Edward Nxumalo Bulelwa Ntsendwana |
| author_facet | William Moloto Pontsho Mbule Edward Nxumalo Bulelwa Ntsendwana |
| author_sort | William Moloto |
| collection | DOAJ |
| description | In an attempt to improve DSSCs efficiency, titanium dioxide (TiO2) hybrid photoanode materials exuding electrocatalytic and photoelectrocatalytic were incorporated into iron based metal organic frameworks (MOFs) derived from BTC = 1,3,5-Benzenetricarboxylic acid and Bismuth based polyoxometalates (POMs). The combination of FeBTC and BiPOM were used to form enhanced photoelectrocatalytic properties, with different concentrations of N-doped carbon quantum dots (CQDs) as the light absorbing materials. The TiO2-FeBTC-BiPOM (6 %) nanocomposites doped with 400 μg/mL CQDs exhibited improved performance with lower charge transfer resistance. As a result, this electrode was used to fabricate a novel natural dye (chlorophyll, anthocyanin and cocktail mixture)-based DSSCs.The cocktail based mixture showed higher power conversion efficiency of 1.92 % compared to spinach based DSSCs (0.98 %) and purple cabbage (0.89 %) under 100 mW/cm2 light illumination with 30 ms of electron lifetime, which is three times and four times more than spinach and cabbage based DSSCs respectively. In comparison to synthetic DSSCs, the efficiency of the natural dyes was still lower than N3 dyes. However, considering practical requirements of DSSCs, the natural dye-based devices satisfy most of the criteria such as affordability, ease of extraction, multiple wavelengths that can be absorbed with large coefficient, non-toxicity, and wide availability. |
| format | Article |
| id | doaj-art-721a7f02df594893be811e0f0f43eda0 |
| institution | Kabale University |
| issn | 2949-7469 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemistry of Inorganic Materials |
| spelling | doaj-art-721a7f02df594893be811e0f0f43eda02025-02-05T04:32:55ZengElsevierChemistry of Inorganic Materials2949-74692025-04-015100087Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyesWilliam Moloto0Pontsho Mbule1Edward Nxumalo2Bulelwa Ntsendwana3DSI/Mintek Nanotechnology Innovation Centre, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Private Bag x 3015, Johannesburg, Gauteng, South Africa; Institute for Nanotechnology and Water Sustainability, CSET, University of South Africa, Johannesburg, 1710, South Africa; Corresponding author. DSI/Mintek Nanotechnology Innovation Centre, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Private Bag x 3015, Johannesburg, Gauteng, South Africa.Department of Physics, CSET, University of South Africa, Johannesburg, 1710, South AfricaInstitute for Nanotechnology and Water Sustainability, CSET, University of South Africa, Johannesburg, 1710, South AfricaDSI/Mintek Nanotechnology Innovation Centre, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Private Bag x 3015, Johannesburg, Gauteng, South Africa; Corresponding author.In an attempt to improve DSSCs efficiency, titanium dioxide (TiO2) hybrid photoanode materials exuding electrocatalytic and photoelectrocatalytic were incorporated into iron based metal organic frameworks (MOFs) derived from BTC = 1,3,5-Benzenetricarboxylic acid and Bismuth based polyoxometalates (POMs). The combination of FeBTC and BiPOM were used to form enhanced photoelectrocatalytic properties, with different concentrations of N-doped carbon quantum dots (CQDs) as the light absorbing materials. The TiO2-FeBTC-BiPOM (6 %) nanocomposites doped with 400 μg/mL CQDs exhibited improved performance with lower charge transfer resistance. As a result, this electrode was used to fabricate a novel natural dye (chlorophyll, anthocyanin and cocktail mixture)-based DSSCs.The cocktail based mixture showed higher power conversion efficiency of 1.92 % compared to spinach based DSSCs (0.98 %) and purple cabbage (0.89 %) under 100 mW/cm2 light illumination with 30 ms of electron lifetime, which is three times and four times more than spinach and cabbage based DSSCs respectively. In comparison to synthetic DSSCs, the efficiency of the natural dyes was still lower than N3 dyes. However, considering practical requirements of DSSCs, the natural dye-based devices satisfy most of the criteria such as affordability, ease of extraction, multiple wavelengths that can be absorbed with large coefficient, non-toxicity, and wide availability.http://www.sciencedirect.com/science/article/pii/S2949746925000011Fe-BTC MOFBiPOMNitrogen doped carbon quantum dotsTiO2 based DSSCPower conversion efficiencyElectron lifetime |
| spellingShingle | William Moloto Pontsho Mbule Edward Nxumalo Bulelwa Ntsendwana Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes Chemistry of Inorganic Materials Fe-BTC MOF BiPOM Nitrogen doped carbon quantum dots TiO2 based DSSC Power conversion efficiency Electron lifetime |
| title | Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes |
| title_full | Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes |
| title_fullStr | Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes |
| title_full_unstemmed | Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes |
| title_short | Fabrication of metal organic framework/Polyoxometalate-TiO2 based DSCCs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage/spinach cocktail natural dyes |
| title_sort | fabrication of metal organic framework polyoxometalate tio2 based dsccs with enhanced electron lifetime and reduced recombination of charge carriers sensitized with cabbage spinach cocktail natural dyes |
| topic | Fe-BTC MOF BiPOM Nitrogen doped carbon quantum dots TiO2 based DSSC Power conversion efficiency Electron lifetime |
| url | http://www.sciencedirect.com/science/article/pii/S2949746925000011 |
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