Abstract
In recent years, the nanostructure for solar cells have attracted
considerable attention from scientists as a result of a promising
candidate for low cost devices. In this work, quantum dots sensitized
solar cells with effective performance based on a co-sensitized
CdS/CdSe:Mn2+ (or Cu2+)
nanocrystal, which was made by successive ionic layer absorption and
reaction, are discussed. The optical, physical, chemical, and photovoltaic
properties of quantum dots sensitized solar cells were sensitized to
Mn2+ and Cu2+ dopants. Therefore, the
short current (J
SC
) of the quantum dot sensitized
solar cells is boosted dramatically from
12.351 mA/cm2 for pure CdSe nanoparticles to
18.990 mA/cm2 for Mn2+ ions
and 19.915 mA/cm2 for Cu2+
ions. Actually, metal dopant extended the band gap of pure CdSe
nanoparticles, reduced recombination, enhanced the efficiency of devices,
and improved the charge transfer and collection. In addition,
Mn2+ and Cu2+ dopants rose to the
level of the conduction band of pure CdSe nanoparticles, which leads to
the reduction of the charge recombination, enhances the light-harvesting
efficiency, and improves the charge diffusion and collection. The results
also were confirmed by the obtained experimental data of photoluminescence
decay and electrochemical impedance spectroscopy.
© 2018 Chinese Laser Press
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription