A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells
Interfacial energy mismatch and carrier recombination at the electron transport layer (ETL)/perovskite interface significantly limit the performance of perovskite solar cells (PSCs). We present a bifunctional dual-layer electron transport layer consisting of a floral TiO2–TiB2 heterostructure integr...
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Elsevier
2025-09-01
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| Series: | Journal of Science: Advanced Materials and Devices |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468217925000528 |
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| author | Nouf Alharbi |
| author_facet | Nouf Alharbi |
| author_sort | Nouf Alharbi |
| collection | DOAJ |
| description | Interfacial energy mismatch and carrier recombination at the electron transport layer (ETL)/perovskite interface significantly limit the performance of perovskite solar cells (PSCs). We present a bifunctional dual-layer electron transport layer consisting of a floral TiO2–TiB2 heterostructure integrated on SnO2 to address these limitations. The TiO2–TiB2 heterostructure, formed through the partial oxidation of hydrothermally produced TiB2 nanoflakes, exhibits advantageous energy band alignment and provides a robust internal electric field at the buried interface, as confirmed by UPS, Mott–Schottky, and KPFM studies. This facilitates effective charge extraction, diminishes trap-assisted recombination, and improves perovskite crystallization while minimizing lattice strain. The optimized dual-layer ETL attains a power conversion efficiency (PCE) of 23.5 %, with a VOC of 1.201 V, J_SC of 24.5 mA cm−2, and a fill factor of 78.81 % in n–i–p structured perovskite solar cells utilizing α-FAPbI3. Improved charge carrier mobility and reduced trap density were validated by SCLC, TRPL, and EIS studies. The gadget demonstrates outstanding operational and environmental stability under heat, moisture, and prolonged light-stress conditions. This study presents a scalable approach for interfacial engineering of dual-layer electron transport layers to achieve extremely efficient and durable perovskite photovoltaics. |
| format | Article |
| id | doaj-art-ca41bfb653a443388d1c32d5c042543b |
| institution | Kabale University |
| issn | 2468-2179 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Science: Advanced Materials and Devices |
| spelling | doaj-art-ca41bfb653a443388d1c32d5c042543b2025-08-20T03:49:46ZengElsevierJournal of Science: Advanced Materials and Devices2468-21792025-09-0110310089910.1016/j.jsamd.2025.100899A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cellsNouf Alharbi0Corresponding author.; Department of Physical Sciences, Physics Division, College of Science, Jazan University, P.O. Box. 114, Jazan, 45142, Kingdom of Saudi ArabiaInterfacial energy mismatch and carrier recombination at the electron transport layer (ETL)/perovskite interface significantly limit the performance of perovskite solar cells (PSCs). We present a bifunctional dual-layer electron transport layer consisting of a floral TiO2–TiB2 heterostructure integrated on SnO2 to address these limitations. The TiO2–TiB2 heterostructure, formed through the partial oxidation of hydrothermally produced TiB2 nanoflakes, exhibits advantageous energy band alignment and provides a robust internal electric field at the buried interface, as confirmed by UPS, Mott–Schottky, and KPFM studies. This facilitates effective charge extraction, diminishes trap-assisted recombination, and improves perovskite crystallization while minimizing lattice strain. The optimized dual-layer ETL attains a power conversion efficiency (PCE) of 23.5 %, with a VOC of 1.201 V, J_SC of 24.5 mA cm−2, and a fill factor of 78.81 % in n–i–p structured perovskite solar cells utilizing α-FAPbI3. Improved charge carrier mobility and reduced trap density were validated by SCLC, TRPL, and EIS studies. The gadget demonstrates outstanding operational and environmental stability under heat, moisture, and prolonged light-stress conditions. This study presents a scalable approach for interfacial engineering of dual-layer electron transport layers to achieve extremely efficient and durable perovskite photovoltaics.http://www.sciencedirect.com/science/article/pii/S2468217925000528TiO2–TiB2SnO2HeterostructurePerovskite solar cellsPSCs |
| spellingShingle | Nouf Alharbi A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells Journal of Science: Advanced Materials and Devices TiO2–TiB2 SnO2 Heterostructure Perovskite solar cells PSCs |
| title | A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells |
| title_full | A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells |
| title_fullStr | A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells |
| title_full_unstemmed | A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells |
| title_short | A bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells |
| title_sort | bifunctional floral tio2 tib2 heterostructure buried interface on sno2 for 23 5 efficient n i p perovskite solar cells |
| topic | TiO2–TiB2 SnO2 Heterostructure Perovskite solar cells PSCs |
| url | http://www.sciencedirect.com/science/article/pii/S2468217925000528 |
| work_keys_str_mv | AT noufalharbi abifunctionalfloraltio2tib2heterostructureburiedinterfaceonsno2for235efficientnipperovskitesolarcells AT noufalharbi bifunctionalfloraltio2tib2heterostructureburiedinterfaceonsno2for235efficientnipperovskitesolarcells |