Jump to main content
Jump to site search

Issue 30, 2016
Previous Article Next Article

Enhanced conversion efficiency in perovskite solar cells by effectively utilizing near infrared light

Author affiliations

Abstract

Up-conversion β-NaYF4:Yb3+,Tm3+/NaYF4 core–shell nanoparticles (NYF NPs) with a high luminous intensity in the visible light region were synthesized by a hydrothermal reaction process. Photocurrent densities of the mesoscopic perovskite solar cells fabricated by incorporating up-conversion NYF NPs into the electron transporting layer are effectively enhanced. The effects of the thicknesses of the electron transporting layer and the weight ratio of up-conversion NYF NPs/TiO2 on the power conversion efficiency (PCE) of the as-fabricated devices were also investigated. The results indicate that the PCE of the optimized device achieves 16.9%, which is 20% higher than that of the device without introducing NYF NPs, and the steady-state PCE of the as-fabricated devices is close to its transient-state PCE. The up-conversion effect of NYF NPs is conducive to higher device performance rather than the nanoparticles as scattering centers to increase possible light absorption of the perovskite film or the electronic effect of the NaYF4 shell surface. These results can be further confirmed by finite-difference time-domain simulation. Photoluminescence results suggest that the multiphonon-assistance can accelerate the nonradiative recombination process at a lower temperature. Incorporating NYF NPs into the electron transporting layer opens a new approach to a promising family of electron transporting materials for mesoscopic perovskite solar cells.

Graphical abstract: Enhanced conversion efficiency in perovskite solar cells by effectively utilizing near infrared light

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Apr 2016, accepted on 28 Jun 2016 and first published on 29 Jun 2016


Article type: Paper
DOI: 10.1039/C6NR03021A
Nanoscale, 2016,8, 14432-14437

  •   Request permissions

    Enhanced conversion efficiency in perovskite solar cells by effectively utilizing near infrared light

    M. Que, W. Que, X. Yin, P. Chen, Y. Yang, J. Hu, B. Yu and Y. Du, Nanoscale, 2016, 8, 14432
    DOI: 10.1039/C6NR03021A

Search articles by author

Spotlight

Advertisements