Sathasivam, Sanjayan;
Ponja, Sapna D;
Park, Seonghyeok;
Sanchez-Perez, Clara;
Blackman, Christopher;
Parkin, Ivan P;
Carmalt, Claire J;
(2023)
Highly Conductive Tungsten-Doped Tin(IV) Oxide Transparent Electrodes Delivered by Lattice-Strain Control.
ACS Applied Energy Materials
, 6
(11)
pp. 5835-5841.
10.1021/acsaem.3c00248.
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Abstract
Alternatives to tin-doped indium oxide transparent electrodes are needed to meet the growing demand for modern electronic devices. Here, we present a chemical vapor deposition route to tungsten-doped SnO2 thin films with resistivities as low as 5.9 × 10–4 Ω cm and electron mobilities as high as 30 cm2 V–1 s–1. Le Bail fitting of the XRD data showed that the substitutional dopant, tungsten(V) causes minimal distortion to the SnO2 unit cell due to its radius closely matching that of tin(IV). Furthermore, crystallographic preferential orientation in the [200] direction that is thought to facilitate a high mobility was also seen. X-ray photoelectron spectroscopy analysis suggests that W is present in the +5 state, as opposed to +6, therefore minimizing ionized impurity scattering, hence also helping achieve the observed high electron mobilities. The tungsten-doped films had optical band gaps of 3.7 eV, thus enabling transparency to visible light.
| Type: | Article |
|---|---|
| Title: | Highly Conductive Tungsten-Doped Tin(IV) Oxide Transparent Electrodes Delivered by Lattice-Strain Control |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsaem.3c00248 |
| Publisher version: | https://doi.org/10.1021/acsaem.3c00248 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | transparent electrodes, metal oxides, doping, thin films, chemical vapor deposition, lattice strain |
| 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/10171103 |
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