Nanostructured TiO2 Grown by Low-Temperature Reactive Sputtering for Planar Perovskite Solar Cells
(2019) In ACS Applied Energy Materials 2(9). p.6218-6229- Abstract
Low-temperature nanostructured electron-transporting layers (ETLs) for perovskite solar cells are grown by reactive sputtering at 160 °C with thickness in the range 22-76 nm and further stabilization in air at 180 °C to improve the lattice structure and to consequently reduce charge recombination during solar cell operation. In addition, the post-deposition treatment aims at leveling differences among samples to ensure material reproducibility. Nanostructured TiO2 has a further added value in promoting the structural coupling with the perovskite layer and establishing conformal interfaces in favor of the charge extraction from the active material. Nanostructuring of the ETLs also allows the shaping of the band gap width and... (More)
Low-temperature nanostructured electron-transporting layers (ETLs) for perovskite solar cells are grown by reactive sputtering at 160 °C with thickness in the range 22-76 nm and further stabilization in air at 180 °C to improve the lattice structure and to consequently reduce charge recombination during solar cell operation. In addition, the post-deposition treatment aims at leveling differences among samples to ensure material reproducibility. Nanostructured TiO2 has a further added value in promoting the structural coupling with the perovskite layer and establishing conformal interfaces in favor of the charge extraction from the active material. Nanostructuring of the ETLs also allows the shaping of the band gap width and position with a beneficial impact on the electrical parameters, as tested in standard architecture containing methylammonium lead iodide perovskites. A balance among parameters is achieved using a 40-nm-thick TiO2 ETL with a maximum efficiency of ∼15% reached without surface treatments or additional layers. The proposed growth methodology would be compatible with the use of flexible substrates after appropriated ETL structural adaptation. It can be likewise applied in perovskite/silicon-heterojunction tandem solar cells to fulfill the industrial demand for clean, solvent-free, reproducible, reliable, and high-throughput processes.
(Less)
- author
- publishing date
- 2019-09-23
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- cyclic voltammetry, material coupling, nanomaterials, PL, TEM, thin films, tunable properties, XRR
- in
- ACS Applied Energy Materials
- volume
- 2
- issue
- 9
- pages
- 12 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85072655578
- ISSN
- 2574-0962
- DOI
- 10.1021/acsaem.9b00708
- language
- English
- LU publication?
- no
- id
- 5d2d6e7d-e986-4b08-be00-ce269728720e
- date added to LUP
- 2023-08-24 12:35:47
- date last changed
- 2023-08-28 09:06:57
@article{5d2d6e7d-e986-4b08-be00-ce269728720e, abstract = {{<p>Low-temperature nanostructured electron-transporting layers (ETLs) for perovskite solar cells are grown by reactive sputtering at 160 °C with thickness in the range 22-76 nm and further stabilization in air at 180 °C to improve the lattice structure and to consequently reduce charge recombination during solar cell operation. In addition, the post-deposition treatment aims at leveling differences among samples to ensure material reproducibility. Nanostructured TiO<sub>2</sub> has a further added value in promoting the structural coupling with the perovskite layer and establishing conformal interfaces in favor of the charge extraction from the active material. Nanostructuring of the ETLs also allows the shaping of the band gap width and position with a beneficial impact on the electrical parameters, as tested in standard architecture containing methylammonium lead iodide perovskites. A balance among parameters is achieved using a 40-nm-thick TiO<sub>2</sub> ETL with a maximum efficiency of ∼15% reached without surface treatments or additional layers. The proposed growth methodology would be compatible with the use of flexible substrates after appropriated ETL structural adaptation. It can be likewise applied in perovskite/silicon-heterojunction tandem solar cells to fulfill the industrial demand for clean, solvent-free, reproducible, reliable, and high-throughput processes.</p>}}, author = {{Alberti, Alessandra and Smecca, Emanuele and Sanzaro, Salvatore and Bongiorno, Corrado and Giannazzo, Filippo and Mannino, Giovanni and La Magna, Antonino and Liu, Maning and Vivo, Paola and Listorti, Andrea and Calabrò, Emanuele and Matteocci, Fabio and Di Carlo, Aldo}}, issn = {{2574-0962}}, keywords = {{cyclic voltammetry; material coupling; nanomaterials; PL; TEM; thin films; tunable properties; XRR}}, language = {{eng}}, month = {{09}}, number = {{9}}, pages = {{6218--6229}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Applied Energy Materials}}, title = {{Nanostructured TiO<sub>2</sub> Grown by Low-Temperature Reactive Sputtering for Planar Perovskite Solar Cells}}, url = {{http://dx.doi.org/10.1021/acsaem.9b00708}}, doi = {{10.1021/acsaem.9b00708}}, volume = {{2}}, year = {{2019}}, }