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Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

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2019
Vujancevic_Manuscript-2019.pdf (1.387Mb)
Authors
Vujančević, Jelena
Andričević, Pavao
Bjelajac, Anđelika
Đokić, Veljko R.
Popović, Maja
Rakočević, Zlatko Lj.
Horvath, Endre
Kollar, Marton
Nafradi, Balint
Schiller, Andreas
Domanski, Konrad
Forro, Laszlo
Pavlović, Vera P.
Janaćković, Đorđe T.
Article (Accepted Version)
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Abstract
Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive... levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019

Keywords:
optical properties / annealing in NH 3 / methylammonium lead triiodide photodetectors / photocurrent / titanium dioxide nanotubes
Source:
Ceramics International, 2019, 45, 8, 10013-10020
Projects:
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)
  • Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
  • Swiss National Science Foundation [160169]
  • ERC advanced grant “PICOPROP” [670918]
Note:
  • Supplementary information: http://dais.sanu.ac.rs/123456789/5969
  • This is the peer-reviewed version of the article: Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V., Popović, M., Rakočević, Z., ... & Domanski, K. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. Ceramics International, 45(8), 10013-10020. http://dx.doi.org/10.1016/j.ceramint.2019.02.045
  • Published version: https://vinar.vin.bg.ac.rs/handle/123456789/8538

DOI: 10.1016/j.ceramint.2019.02.045

ISSN: 0272-8842

WoS: 000465058500040

Scopus: 2-s2.0-85061828876
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http://vinar.vin.bg.ac.rs/handle/123456789/8539
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