Interfacial Engineering at Quantum Dot-Sensitized TiO2 Photoelectrodes for Ultrahigh Photocurrent Generation
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
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INVESTIGACIONMetadades
Títol
Interfacial Engineering at Quantum Dot-Sensitized TiO2 Photoelectrodes for Ultrahigh Photocurrent GenerationAutoria
Data de publicació
2021-02-01Editor
American Chemical SocietyISSN
1944-8244; 1944-8252Cita bibliogràfica
Kim, T. Y.; Kim, B. S.; Oh, J. G.; Park, S. C.; Jang, J.; Hamann, T. W.; Kang, Y. S.; Bang, J. H.;Gimenez, S.; Kang, Y. S. Interfacial Engineering at Quantum Dot-Sensitized TiO2 Photoelectrodes for Ultrahigh Photocurrent Generation. ACS Appl. Mater. Interfaces 2021, 13, 5, 6208-6218., DOI: 10.1021/acsami.0c19352Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/abs/10.1021/acsami.0c19352Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Metal oxide semiconductor/chalcogenide quantum dot (QD) heterostructured photoanodes show photocurrent densities >30 mA/cm2 with ZnO, approaching the theoretical limits in photovoltaic (PV) cells. However, comparative ... [+]
Metal oxide semiconductor/chalcogenide quantum dot (QD) heterostructured photoanodes show photocurrent densities >30 mA/cm2 with ZnO, approaching the theoretical limits in photovoltaic (PV) cells. However, comparative performance has not been achieved with TiO2. Here, we applied a TiO2(B) surface passivation layer (SPL) on TiO2/QD (PbS and CdS) and achieved a photocurrent density of 34.59 mA/cm2 under AM 1.5G illumination for PV cells, the highest recorded to date. The SPL improves electron conductivity by increasing the density of surface states, facilitating multiple trapping/detrapping transport, and increasing the coordination number of TiO2 nanoparticles. This, along with impeded electron recombination, led to enhanced collection efficiency, which is a major factor for performance. Furthermore, SPL-treated TiO2/QD photoanodes were successfully exploited in photoelectrochemical water splitting cells, showing an excellent photocurrent density of 14.43 mA/cm2 at 0.82 V versus the Reversible Hydrogen Electrode (RHE). These results suggest a new promising strategy for the development of high-performance photoelectrochemical devices. [-]
Publicat a
ACS Applied Materials and Interfaces, 2021, vol. 13, no 5Entitat finançadora
Korea Center for Artificial Photosynthesis (KCAP) of Sogang University - Ministry of Science, ICT, and Future Planning (MSIP) through a National Research Foundation of Korea | Basic Science Research Program through the National Research Foundation (NRF) of Korea - Ministry of Science and ICT | Ministry of Education | Ministerio de Ciencia, Innovación y Universidades
Codi del projecte o subvenció
2009-0093883 | NRF-2019R1A2C1003429 | NRF-2018R1A6A1A03024231 | ENE2017–85087-C3-1-R
Drets d'accés
info:eu-repo/semantics/openAccess
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