Dye-sensitized solar cells with efficiency enhancement surpassing 65% through layer-by-layer assembled plasmonic photoanodes

被引:13
作者
Bhojanaa, Karuppanapillai Baskardurai [1 ,2 ]
Mohammed, Jailani Javith [1 ]
Manishvarun, Manivannan [1 ]
Pandikumar, Alagarsamy [1 ,2 ]
机构
[1] CSIR Cent Electrochem Res Inst, Electro Organ & Mat Electrochem Div, Karaikkudi 630003, Tamil Nadu, India
[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
关键词
Layer-by-layer assembly; Silver nanoparticles; Plasmonic effect; Fermi-level shift; Dye-sensitized solar cells; NANOPARTICLES; NANOCOMPOSITE; PERFORMANCE; SILVER; FABRICATION; CONVERSION; RESONANCE; ZNO; AU;
D O I
10.1016/j.jpowsour.2022.232593
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Even though plasmonic photoelectrodes have paved the way for high-efficiency DSSC, metal nanoparticle degradation in iodine-based electrolytes restricts commercialization. In order to protect the plasmonic nano-particles, the plasmonic photoelectrode having a layer-by-layer assembly of TiO2/Ag/TiO2 has been developed by a simple photoreduction at various time intervals followed by mild TiCl4 treatment over the TiO2 film and fabricated into dye-sensitized solar cells (DSSC). On evaluating the performance of fabricated DSSC under AM 1.5 G irradiation with the intensity of 100 mWcm(-2), the champion cell (eta = 11%) shows 65% enhancement in power conversion efficiency compared to the pristine TiO2 photoanode-based DSSC (eta = 6.67%). The photo-current density has been improved due to the surface plasmon resonance effect of Ag nanoparticles and the formation of TiO2 by TiCl4 treatment not only protects the Ag metal nanoparticles as well as creates more dye-loading sites. A negative shift in the Fermi-level caused by the accumulation of electrons in Ag, triggers the open-circuit voltage to increase by 100 mV which is evident from the Mott-Schottky analysis. The electron lifetime value is increased due to increased charge collection efficiency. The champion cell shows 91.5% retainment in efficiency even after 5 days.
引用
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页数:8
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