Temperature Studies of Zinc Tin Oxide Photoluminescence for Optical O<sub>2</sub> Sensing
The photoluminescence of zinc tin oxide (ZTO) is investigated regarding its temperature (room temperature to 433 K) and gas-phase oxygen (O2) concentration (250 ppm to 20 vol %) dependence. Both the emission intensity and electrical conductance decrease upon O2 adsorption, as ZTO is an n-type semiconductor. A temperature increase significantly quenches the photoluminescence intensity and results in a strong blue-shift of the orange and red emission. The temperature-induced exponential intensity decay can be described with an empirical equation similar to the Fermi–Dirac statistic. The obtained activation energies allow to propose a detailed band scheme of ZTO.
Authors
- Michael Tiemann (ORCID: https://orcid.org/0000-0003-1711-2722)
- Stephan Ester (ORCID: https://orcid.org/0000-0003-0662-3551)
- Linda Kothe
- Marvin Kloß (ORCID: https://orcid.org/0000-0002-3313-4510)
- Michael Poeplau (ORCID: https://orcid.org/0000-0003-0835-1481)
- Tobias Wagner (ORCID: https://orcid.org/0009-0006-6764-0979)
- Marc Wengenroth
Institutions
- Paderborn University (DE)
Publication Details
- Journal
- The Journal of Physical Chemistry C
- Published
- 2025-05-06
- DOI
- https://doi.org/10.1021/acs.jpcc.5c01678
- Citations
- 1
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.73