The Renaissance of Iron Pyrite Photovoltaics: Progress, Challenges, and Perspectives - Low-cost Nanomaterials: Toward Greener and More Efficient Energy Applications - page 156

Fig. 17 J-V curves of
fabricated solar cells with
different FeS 2 /CdS ratios.
Reprinted with permission
from [ 61 ]
Fig. 18 AFM images of layers created with a 2:1 and b 1:1 loading ratio of FeS 2 /CdS. Reprinted
with permission from [ 61 ]
of 1.1 % over 100 devices. The devices with higher loading of FeS 2 experienced
worse performance due to roughness of the film that can be seen in the Atomic
Force Microscopy (AFM) images in Fig. 18 . These devices have overcome the
lifetime problem of low V oc by creating bulk heterojunction allowing for increased
charge separation. With the devices reaching 1.1 % efficiency, the first working
pyrite nanocrystal solar cell has been fabricated [ 63 ]. Focus on improving these
cells and controlled synthesis of pyrite is ongoing in our lab.