Publication: Profound influence of surface trap states on the utilization of charge carriers in CdS photoanodes
dc.contributor.department | KUTEM (Koç University Tüpraş Energy Center) | |
dc.contributor.department | Department of Chemistry | |
dc.contributor.department | KUYTAM (Koç University Surface Science and Technology Center) | |
dc.contributor.department | Graduate School of Sciences and Engineering | |
dc.contributor.kuauthor | Kaya, Sarp | |
dc.contributor.kuauthor | Jahangiri, Hadi | |
dc.contributor.schoolcollegeinstitute | College of Sciences | |
dc.contributor.schoolcollegeinstitute | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
dc.contributor.schoolcollegeinstitute | Research Center | |
dc.date.accessioned | 2025-01-19T10:27:55Z | |
dc.date.issued | 2023 | |
dc.description.abstract | CdS is one of the most promising photoanode candidates for photoelectrochemical (PEC) water splitting because of its narrow bandgap, suitable band-edge alignment, and facile fabrication. However, it suffers from photocorrosion and instability due to surface charge recombination. Extensive PEC characterization studies showed that hole utilization at the photoanode/electrolyte interface is the bottleneck for CdS photoanodes. In this study, the fundamental charge carrier dynamics processes on CdS surfaces were investigated and a deactivation mechanism was proposed where surface sulfur vacancies (Sv) served as electron trap centers that caused surface charge recombination. Detailed photocurrent transients showed that the extent of trapping was affected by Sv content and oxygen evolution via the water oxidation reaction. To circumvent this issue, a surface decoration method was demonstrated by using hexadecyltrimethylammonium bromide (CTAB) which passivated electron trapping via occupation of the surface Svs by Br-. This work may contribute to further studies on CdS and other semiconductor photoelectrodes to enhance the understanding of charge utilization processes at photoanode-electrolyte interfaces. In CdS photoanodes, the decoration of surface sulfur vacancies by CTAB passivates the electron trapping process, resulting in improved photoelectrochemical water oxidation performance. | |
dc.description.indexedby | WOS | |
dc.description.indexedby | Scopus | |
dc.description.issue | 4 | |
dc.description.openaccess | gold | |
dc.description.publisherscope | International | |
dc.description.sponsoredbyTubitakEu | N/A | |
dc.description.volume | 5 | |
dc.identifier.doi | 10.1039/d3ma00847a | |
dc.identifier.eissn | 2633-5409 | |
dc.identifier.quartile | Q2 | |
dc.identifier.scopus | 2-s2.0-85180070199 | |
dc.identifier.uri | https://doi.org/10.1039/d3ma00847a | |
dc.identifier.uri | https://hdl.handle.net/20.500.14288/25639 | |
dc.identifier.wos | 1125755700001 | |
dc.keywords | Charge carriers | |
dc.keywords | Charge trapping | |
dc.keywords | Narrow band gap semiconductors | |
dc.keywords | Selenium compounds | |
dc.keywords | Semiconducting cadmium telluride | |
dc.keywords | Semiconducting indium phosphide | |
dc.language.iso | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.relation.ispartof | Materials Advances | |
dc.subject | Materials science, multidisciplinary | |
dc.title | Profound influence of surface trap states on the utilization of charge carriers in CdS photoanodes | |
dc.type | Journal Article | |
dspace.entity.type | Publication | |
local.contributor.kuauthor | Alagöz, Elif Öykü | |
local.contributor.kuauthor | Jahangiri, Hadi | |
local.contributor.kuauthor | Kaya, Sarp | |
local.publication.orgunit1 | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
local.publication.orgunit1 | College of Sciences | |
local.publication.orgunit1 | Research Center | |
local.publication.orgunit2 | Department of Chemistry | |
local.publication.orgunit2 | KUTEM (Koç University Tüpraş Energy Center) | |
local.publication.orgunit2 | KUYTAM (Koç University Surface Science and Technology Center) | |
local.publication.orgunit2 | Graduate School of Sciences and Engineering | |
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