Don, CH;
Shalvey, TP;
Smiles, MJ;
Thomas, L;
Phillips, LJ;
Hobson, TDC;
Finch, H;
... Major, JD; + view all
(2023)
Multi-Phase Sputtered TiO2-Induced Current–Voltage Distortion in Sb2Se3 Solar Cells.
Advanced Materials Interfaces
10.1002/admi.202300238.
(In press).
Preview |
Text
Multi Phase Sputtered TiO2 Induced Current Voltage Distortion in Sb2Se3 Solar Cells.pdf - Published Version Download (3MB) | Preview |
Abstract
Despite the recent success of CdS/Sb2Se3 heterojunction devices, cadmium toxicity, parasitic absorption from the relatively narrow CdS band gap (2.4 eV) and multiple reports of inter-diffusion at the interface forming Cd(S,Se) and Sb2(S,Se)3 phases, present significant limitations to this device architecture. Among the options for alternative partner layers in antimony chalcogenide solar cells, the wide band gap, non-toxic titanium dioxide (TiO2) has demonstrated the most promise. It is generally accepted that the anatase phase of the polymorphic TiO2 is preferred, although there is currently an absence of analysis with regard to phase influence on device performance. This work reports approaches to distinguish between TiO2 phases using both surface and bulk characterization methods. A device fabricated with a radio frequency (RF) magnetron sputtered rutile-TiO2 window layer (FTO/TiO2/Sb2Se3/P3HT/Au) achieved an efficiency of 6.88% and near-record short–circuit current density (Jsc) of 32.44 mA cm−2, which is comparable to established solution based TiO2 fabrication methods that produced a highly anatase-TiO2 partner layer and a 6.91% efficiency device. The sputtered method introduces reproducibility challenges via the enhancement of interfacial charge barriers in multi-phase TiO2 films with a rutile surface and anatase bulk. This is shown to introduce severe S-shaped current–voltage (J–V) distortion and a drastic fill–factor (FF reduction in these devices.
| Type: | Article |
|---|---|
| Title: | Multi-Phase Sputtered TiO2-Induced Current–Voltage Distortion in Sb2Se3 Solar Cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/admi.202300238 |
| Publisher version: | https://doi.org/10.1002/admi.202300238 |
| Language: | English |
| Additional information: | © 2023 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | anatase, barrier, photovoltaics, rutile, Sb2Se3, S-shape, TiO2 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10172822 |
Archive Staff Only
 |
View Item |
