Simultaneous Multiple Wavelength Upconversion in a Core-Shell Nanoparticle for Enhanced Near Infrared Light Harvesting in a Dye-Sensitized Solar Cell
2014 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 6, no 20, 18018-18025 p.Article in journal (Refereed) Published
The efficiency of most photovoltaic devices is severely limited by near-infrared (NIR) transmission losses. To alleviate this limitation, a new type of colloidal upconversion nanoparticles (UCNPs), hexagonal core-shell-structured beta-NaYbF4:Er3+(2%)/NaYF4:Nd3+(30%), is developed and explored in this work as an NIR energy relay material for dye-sensitized solar cells (DSSCs). These UCNPs are able to harvest light energy in multiple NIR regions, and subsequently convert the absorbed energy into visible light where the DSSCs strongly absorb. The NIR-insensitive DSSCs show compelling photocurrent increases through binary upconversion under NIR light illumination either at 785 or 980 nm, substantiating efficient energy relay by these UCNPs. The overall conversion efficiency of the DSSCs was improved with the introduction of UCNPs under simulated AM 1.5 solar irradiation.
Place, publisher, year, edition, pages
2014. Vol. 6, no 20, 18018-18025 p.
upconversion, dye-sensitized solar cells, energy relay, nanoparticles, near-infrared
Nano Technology Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-156442DOI: 10.1021/am504866gISI: 000343684200081ScopusID: 2-s2.0-84908222033OAI: oai:DiVA.org:kth-156442DiVA: diva2:767978
QC 201412022014-12-022014-11-282014-12-02Bibliographically approved