Pi-pi* orbital transitions and photo-degeneracy of C.acuminata sensitized solar cells

2nd International Symposium on Frontier of Applied Physics

Abodunrin, T.^1 ; Boyo, A.^2 ; Usikalu, M.^1 ; Obafemi, L.^1 ; Oladapo, O.^1 ; Kotsedi, L.^3 ; Yenus, Z.^3 ; Maaza, M.^3

Covenant University, Canaanland, Nigeria^1

Lagos State University, Ojo, Nigeria^2

IThemba Labs, Western Cape, South Africa^3

关键词: Doctor blade method;    High-temperature sintering;    Large specific surface areas;    Low-cost photovoltaics;    Maximum power output;    Porous metal oxides;    Power conversion efficiencies;    Sensitized solar cells;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/817/1/012017/pdf
DOI  :  10.1088/1742-6596/817/1/012017

来源: IOP

【 摘 要 】

Dye-sensitized solar cells (DSSCs) have acquired great prominence as favourable low-cost photovoltaics due to their ease of fabrication, all- year -availability, ease of obtaining raw materials and adjustable optical properties like transparency and colour. These advantages coupled with the ability to work under poor lighting makes them a suitable candidate for next generation of research. In this research, C.acuminata-sensitized photo anodes play an important role for achieving high performance since the porous metal oxide films provide a large specific surface area for dye loading and the possibility to extend the absorption threshold of past studies of sensitizers. The doctor blade method and high-temperature sintering were some of the methods used in the fabrication of the photo anode. A study of the performance of the C.acuminata-DSSCs with four different electrolyte sensitizers based on iodide redox mediator is determined. The result is DSSCs that exhibit a maximum power output of 39.37 W, fill factor of 0.7 and a power conversion efficiency of 0.6% under unfavourable sunlight intensity conditions and photo-degradation of about 37.5 % in absorbance after 425 suns.