Simplistic thermal transformation of MIL-125 to TiO2 nano-coins and nano-diamonds for efficient quantum-dot sensitized solar cells

被引：11
作者：
Basie, Muhammad Abdul [1 ]
Rashid, Muhammad [2 ]
Khan, Talha Farooq [1 ]
Muhyuddin, Mohsin [1 ]
Butt, Sajid [1 ]
机构：
[1] Inst Space Technol, Dept Mat Sci & Engn, Islamabad 44000, Pakistan
[2] Univ Vet & Anim Sci, Fac Fisheries & Wildlife, Lahore, Pakistan
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2019年 / 104卷
关键词：
Photoanode; Quantum-dots; MOFs; TiO2; Solar cells; PbS; Heat treatment; METAL-ORGANIC FRAMEWORKS; PHOTOANODE; MICROSPHERES; LAYER; DESIGN;
D O I：
10.1016/j.mssp.2019.104663
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
TiO2-based nano-coins and nano-diamonds were successfully incorporated for improved performance of PbS quantum-dot sensitized solar cells (QDSCs) through a simplistic thermal transformation of NH2-MIL-125(Ti). We report a modified heat-treatment process which affirms simple transformation of NH2-MIL-125(Ti) to TiO2 in addition to the removal of organic constituents of screen-printed TiO2 photoanoade, eliminating the discrete heat-treatment cycle for thermal transformation of NH2-MIL-125(Ti) before screen-printing. X-ray diffraction spectroscopy (XRD) revealed the phase transformation and resultant crystal structures of TiO2 while XPS was used to authenticate the fabrication of PbS sensitized TiO2 photoanode. UV-Vis spectroscopy showed that the modified photoanodes with TiO2 nano-coins and nano-diamonds exhibited improved reflectance of light, which resulted in enhanced visible light absorbance in PbS QDs. Relatively, incorporation of simplistically transformed TiO2 nano-diamonds resulted higher photocurrent density (J(SC) similar to 17 mA/cm(2)) in QDSCs which was credited to superior absorbance of incident light and inferior charge carrier recombination.
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页数：7
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