The Role of Size and Dimerization of Decorating Plasmonic Silver Nanoparticles on the Photoelectrochemical Solar Water Splitting Performance of BiVO4 Photoanodes
2016 (English)In: CHEMNANOMAT, ISSN 2199-692X, Vol. 2, no 7, 739-747 p.Article in journal (Refereed) Published
Ag nanoparticles (NPs) are deposited on BiVO4 photoanodes to study their effect on the photoelectrochemical (PEC) water splitting performance of the semiconductor. 15 nm light-absorbing NPs and 65 nm light scattering NPs were studied separately to compare their light trapping ability for enhancing the semiconductors absorption through light concentration and light scattering, respectively. The 15 nm NPs enhanced the BiVO4 external quantum efficiency throughout the semiconductors absorption range (e.g.,approximate to 2.5 fold at lambda=400 nm). However, when a hole scavenger was added to the electrolyte, no enhancement was ob-served upon NP deposition, indicating that the NPs only facilitate the injection of holes from the semiconductor surface to the electrolyte but do not enhance its absorption. On the other hand, the 65 nm scattering NPs not only facilitated hole injection to the electrolyte, but also enhanced the absorption of the semiconductor (by approximate to 6%) through light scattering. Such a dual effect, i.e., of enhancing both the surface properties and the absorption of the semiconductor, makes light scattering Ag NPs an ideal decoration for PEC water splitting photoelectrodes.
Place, publisher, year, edition, pages
Weinheim: WILEY-V C H VERLAG GMBH , 2016. Vol. 2, no 7, 739-747 p.
silver nanoparticles; BiVO4; light scattering; plasmonic nanoparticles; water splitting
IdentifiersURN: urn:nbn:se:liu:diva-132084DOI: 10.1002/cnma.201600026ISI: 000383773800025OAI: oai:DiVA.org:liu-132084DiVA: diva2:1038381
Funding Agencies|VENI project NWO; NWONANO 2016-10-182016-10-172016-10-27Bibliographically approved