Macdonald, TJ;
Batmunkh, M;
Lin, C-T;
Kim, J;
Tune, DD;
Ambroz, F;
Li, X;
... Durrant, JR; + view all
(2019)
Origin of Performance Enhancement in TiO₂-Carbon Nanotube Composite Perovskite Solar Cells.
Small Methods
, 3
(10)
, Article 1900164. 10.1002/smtd.201900164.
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Abstract
Carbon nanotubes are shown to be beneficial additives to perovskite solar cells, and the inclusion of such nanomaterials will continue to play a crucial role in the push toward developing efficient and stable device architectures. Herein, titanium dioxide/carbon nanotube composite perovskite solar cells are fabricated, and device performance parameters are correlated with spectroscopic signatures of the materials to understand the origin of performance enhancement. By probing the charge carrier dynamics with photoluminescence and femtosecond transient absorption spectroscopy, the results indicate that charge transfer is not improved by the presence of the carbon nanotubes. Instead, carbon nanotubes are shown to passivate the electronic defect states within the titanium dioxide, which can lead to stronger radiative recombination in the titanium dioxide/carbon nanotube films. The defect passivation allows the perovskite solar cells made using an optimized titanium dioxide/carbon nanotube composite to achieve a peak power conversion efficiency of 20.4% (19% stabilized), which is one of the highest values reported for perovskite solar cells not incorporating a mixed cation light absorbing layer. The results discuss new fundamental understandings for the role of carbon nanomaterials in perovskite solar cells and present a significant step forward in advancing the field of high‐performance photovoltaics.
| Type: | Article |
|---|---|
| Title: | Origin of Performance Enhancement in TiO₂-Carbon Nanotube Composite Perovskite Solar Cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/smtd.201900164 |
| Publisher version: | https://doi.org/10.1002/smtd.201900164 |
| Language: | English |
| Additional information: | This is the accepted version of the following article: Macdonald, TJ; Batmunkh, M; Lin, C-T; Kim, J; Tune, DD; Ambroz, F; Li, X; Xu, S; Sol, C; Papakonstantinou, I; McLachlan, MA; Parkin, IP; Shapter, JG; Durrant, JR (2019) Origin of Performance Enhancement in TiO₂-Carbon Nanotube Composite Perovskite Solar Cells. Small Methods, 3 (10), Article 1900164. 10.1002/smtd.201900164, which has been published in final form at: https://doi.org/10.1002/smtd.201900164. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [olabout.wiley.com/WileyCDA/Section/id- 820227.html] |
| Keywords: | carbon nanotubes, CNTs, device performance, perovskite solar cells, titanium dioxide |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10085490 |
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