Water adsorption enhances electrical conductivity in transparent p-type CuI
- CuI has been recently rediscovered as a p-type transparent conductor with a high figure of merit. Even though many metal iodides are hygroscopic, the effect of moisture on the electrical properties of CuI has not been clarified. In this work, we observe a 2-fold increase in the conductivity of CuI after exposure to ambient humidity for 5 h, followed by slight long-term degradation. Simultaneously, the work function of CuI decreases by almost 1 eV, which can explain the large spread in the previously reported work function values. The conductivity increase is partially reversible and is maximized at intermediate humidity levels. On the basis of the large intragrain mobility measured by THz spectroscopy, we suggest that hydration of grain boundaries may be beneficial for the overall hole mobility.
| Verfasserangaben: | Andrea CrovettoORCiDGND, Hannes HempelORCiDGND, Marin RusuORCiD, Leo ChoubracORCiD, Sandrino Danny KojdaORCiDGND, Klaus HabichtORCiDGND, Thomas UnoldORCiD |
|---|---|
| DOI: | https://doi.org/10.1021/acsami.0c11040 |
| ISSN: | 1944-8244 |
| ISSN: | 1944-8252 |
| Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/33059445 |
| Titel des übergeordneten Werks (Englisch): | ACS applied materials & interfaces |
| Verlag: | American Chemical Society |
| Verlagsort: | Washington, DC |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Datum der Erstveröffentlichung: | 15.10.2020 |
| Erscheinungsjahr: | 2020 |
| Datum der Freischaltung: | 09.10.2023 |
| Freies Schlagwort / Tag: | CuI; conductivity; copper iodide; humidity; p-type; transparent conductors; work function |
| Band: | 12 |
| Ausgabe: | 43 |
| Seitenanzahl: | 7 |
| Erste Seite: | 48741 |
| Letzte Seite: | 48747 |
| Fördernde Institution: | European Union's Horizon 2020 research and innovation program under the; Marie Sklodowska-Curie [840751] |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Peer Review: | Referiert |
