Humic Acid as
a Sensitizer in Highly Stable Dye Solar Cells: Energy from an Abundant
Natural Polymer Soil Component
Posted on 2016-07-31 - 00:00
Humic acid (HA), a natural polymer
and soil component, was explored
as a photosensitizer in dye-sensitized solar cells (DSSCs). Photophysical
and electrochemical properties show that HA covers a broad visible
range of the electromagnetic spectrum and exhibits a quasi-reversible
nature in cyclic voltammetry (CV). Because of its abundant functionalities,
HA was able to bind onto the nano-titania surface and possessed good
thermal stability. HA was employed as a sensitizer in DSSCs and characterized
by various photovoltaic techniques such as I–V, incident-photo-to-current conversion efficiency (IPCE),
electrochemical impedance spectroscopy (EIS), and Tafel polarization.
The HA-based device shows a power conversion efficiency (PCE) of 1.4%
under 1 sun illumination. The device performance was enhanced when
a coadsorbent, chenodeoxycholic acid (CDCA), along with HA was used
and displayed 2.4% PCE under 0.5 sun illumination. The DSSCs employing
HA with CDCA showed excellent stability up to 1000 h. The reported
efficiency of devices with HA is better than that of devices with
all natural sensitizers reported so far.
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Vekariya, Rohit
L.; Sonigara, Keval K.; Fadadu, Kishan B.; Vaghasiya, Jayraj V.; Soni, Saurabh S. (2016). Humic Acid as
a Sensitizer in Highly Stable Dye Solar Cells: Energy from an Abundant
Natural Polymer Soil Component. ACS Publications. Collection. https://doi.org/10.1021/acsomega.6b00010
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AUTHORS (5)
RV
Rohit
L. Vekariya
KS
Keval K. Sonigara
KF
Kishan B. Fadadu
JV
Jayraj V. Vaghasiya
SS
Saurabh S. Soni
KEYWORDS
DSSCStable Dye Solar Cellschenodeoxycholic acidcyclic voltammetrydevice performanceAbundant Natural Polymer Soil Component Humic acidphotovoltaic techniquespower conversion efficiencyHA1000 hPCE1 sun illuminationelectrochemical properties showTafel polarizationsoil componentCVelectromagnetic spectrumCDCAEIS0.5 sun illuminationIPCE