scholarly journals Effect of Mg Doping on SnO2 Energy Band and Power Conversion Efficiency of Dye-Sensitized Solar Cells

2021 ◽  
Vol 2101 (1) ◽  
pp. 012066
Author(s):  
Hao Yang ◽  
Hao Fan ◽  
Junhong Duan
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Electrochemical Impedance ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Mg Doping ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Mg Doped

Abstract In this work, Mg-doped SnO2 materials with different molar ratios were synthesized by hydrothermal method. Based on the UV-Vis study, band gap (Eg) of the Mg-doped SnO2 is adjusted from 3.76 eV to 3.65 eV via 3 at% concentrations. Results of photovoltaic measurement for dye-sensitized solar cells (DSCs) based on Mg-doped SnO2 film as photoanode indicate that the doping of Mg ions can improve the open-circuit voltage (V oc) of the DSCs, while the electric current density (J sc) of the DSCs is almost unchanged. The cells were measured at 3 days intervals within 24 days after fabrication. Power conversion efficiency (PCE) of 3 at% Mg-doped SnO2 DSCs increases step by step and achieves 4.38% as the cell is tested after 18 days. Electrochemical impedance spectroscopy (EIS) analysis shows that Mg doping enhances light collection, increased the number of photogenerated electrons and inhibits charge recombination.

Spontaneous Enhancement of Power Conversion Efficiency in SnO2-Based Dye-Sensitized Solar Cells

2021 ◽  
Vol 11 (3) ◽  
pp. 674-678
Author(s):  
Shibing Zou ◽  
Lingting Song ◽  
Junhong Duan ◽  
Le Huang ◽  
Weiqing Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Donor-π-acceptor, triazine-linked porphyrin dyads as sensitizers for dye-sensitized solar cells

2015 ◽  
Vol 19 (01-03) ◽  
pp. 175-191 ◽  
Author(s):  
Ganesh D. Sharma ◽  
Galateia E. Zervaki ◽  
Kalliopi Ladomenou ◽  
Emmanuel N. Koukaras ◽  
Panagiotis P. Angaridis ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Carboxylic Acid ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Orbital Energy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Two porphyrin dyads with the donor-π-acceptor molecular architecture, namely ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which consist of a zinc-metalated porphyrin unit and a free-base porphyrin unit covalently linked at their peripheries to a central triazine group, substituted either by a glycine in the former or a N-piperidine group in the latter, have been synthesized via consecutive amination substitution reactions of cyanuric chloride. The UV-vis absorption spectra and cyclic-voltammetry measurements of the two dyads, as well as theoretical calculations based on Density Functional Theory, suggest that they have suitable frontier orbital energy levels for use as sensitizers in dye-sensitized solar cells. Dye-sensitized solar cells based on ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ) have been fabricated, and they were found to exhibit power conversion efficiency values of 5.44 and 4.15%, respectively. Photovoltaic measurements (J–V curves) and incident photon to current conversion efficiency spectra of the two solar cells suggest that the higher power conversion efficiency value of the former solar cell is a result of its enhanced short circuit current, open circuit voltage, and fill factor values, as well as higher dye loading. This is ascribed to the existence of two carboxylic acid anchoring groups in ( ZnP )-[triazine-gly]-( H 2 PCOOH ), compared to one carboxylic acid group in ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which leads to a more effective binding onto the TiO 2 photoanode. Electrochemical impedance spectra show evidence that the ( ZnP )-[triazine-gly]-( H 2 PCOOH ) based solar cell exhibits a longer electron lifetime and more effective suppression of charge recombination reactions between the injected electrons and electrolyte.

Push–pull type alkoxy-wrapped N-annulated perylenes for dye-sensitized solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 81184-81190 ◽  
Author(s):  
Qingbiao Qi ◽  
Jing Zhang ◽  
Soumyajit Das ◽  
Wangdong Zeng ◽  
Jie Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Three push–pull type, alkoxy-wrapped N-annulated perylene based sensitizers were synthesized and power conversion efficiency up to 8.38% was achieved.

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