Humic Acid as a Sensitizer in Highly Stable Dye Solar Cells: Energy from an Abundant Natural Polymer Soil Component | Zendy

Rohit L. Vekariya | Zendy; Keval K. Sonigara | Zendy; Kishan B. Fadadu | Zendy; Jayraj V. Vaghasiya | Zendy; Saurabh S. Soni | Zendy

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Humic Acid as a Sensitizer in Highly Stable Dye Solar Cells: Energy from an Abundant Natural Polymer Soil Component

Author(s) -

Rohit L. Vekariya,

Keval K. Sonigara,

Kishan B. Fadadu,

Jayraj V. Vaghasiya,

Saurabh S. Soni

Publication year - 2016

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.6b00010

Subject(s) - tafel equation , cyclic voltammetry , photosensitizer , dye sensitized solar cell , dielectric spectroscopy , materials science , energy conversion efficiency , polarization (electrochemistry) , humic acid , thermal stability , chemical engineering , polymer , electrochemistry , photochemistry , optoelectronics , chemistry , electrode , organic chemistry , composite material , fertilizer , engineering , electrolyte

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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