Enhanced Performance of p-Type Dye-Sensitized Solar Cells Based on Ultrasmall Mg-Doped CuCrO2 Nanocrystals
2013 (English)In: ChemSusChem, ISSN 1864-5631, Vol. 6, no 8, 1432-1437 p.Article in journal (Refereed) Published
Herein, we present ultrasmall delafossite-type Mg-doped CuCrO2 nanocrystals prepared by using hydrothermal synthesis and their first application as photocathodes in efficient p-type dye-sensitized solar cells. The short-circuit current density (J(sc)) is notably increased by approximately 27% owing to the decreased crystallite size and the enhanced optical transmittance associated with Mg doping of the CuCrO2 nanocrystalline sample. An open-circuit voltage (V-oc) of 201mV, J(sc) of 1.51mAcm(-2), fill factor of 0.449, and overall photoconversion efficiency of 0.132% have been achieved with the CuCr0.9Mg0.1O2 dye photocathode sensitized with the P1 dye under optimized conditions. This efficiency is nearly threetimes higher than that of the NiO-based reference device, which is attributed to the largely improved V-oc and J(sc). The augmentation of V-oc and J(sc) can be attributed to the lower valance band position and the faster hole diffusion coefficient of CuCr0.9Mg0.1O2 compared to those of the NiO reference, respectively, which leads to a higher hole collection efficiency.
Place, publisher, year, edition, pages
2013. Vol. 6, no 8, 1432-1437 p.
delaffosite oxides, doping, hydrothermal synthesis, semiconductors, solar cells
IdentifiersURN: urn:nbn:se:kth:diva-129631DOI: 10.1002/cssc.201300265ISI: 000323105700027ScopusID: 2-s2.0-84882313703OAI: oai:DiVA.org:kth-129631DiVA: diva2:653194
QC 201310032013-10-032013-10-032013-10-03Bibliographically approved