Improving the efficiency of dye sensitized solar cells by TiO2-graphene nanocomposite photoanode

被引：19
|
作者：
Mehmood, Umer [1 ]
Ahmed, Shakeel [2 ]
Hussein, Ibnelwaleed A. [1 ,3 ]
Harrabi, Khalil [4 ]
机构：
[1] King Fahd Univ Petr & Minerals, Dept Chem Engn, Dhahran 31261, Saudi Arabia
[2] King Fahd Univ Petr & Minerals, Ctr Refining & Petrochem, Dhahran 31261, Saudi Arabia
[3] Qatar Univ, Gas Proc Ctr, Coll Engn, Doha, Qatar
[4] King Fahd Univ Petr & Minerals, Dept Phys, Dhahran 31261, Saudi Arabia
来源：
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS | 2015年 / 16卷
关键词：
Nanocomposite photoanodes; Dye sensitized solar cell; Graphene; Titania; Power conversion efficiency; CARBON NANOTUBE; GRAPHENE; TIO2; CONVERSION; COMPOSITE; ENHANCEMENT; PERFORMANCE; REDUCTION; TRANSPORT; FILMS;
D O I：
10.1016/j.photonics.2015.08.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nanocomposite photoanodes were prepared by addition of graphene (GR) micro-platelets to TiO2 nanoparticulate paste. TiO2/graphene based DSS Cs were fabricated using Z907 photosensitizer. Transmission electron microscope was used to confirm the presence of graphene in composite films after heating at 450 degrees C for 30 min. UV-visible absorption spectroscopy, photocurrent voltage characteristics and electrochemical impedance spectroscopic measurements were conducted to characterize the DSSCs. The results show that the photo conversion efficiency is highly dependent on the concentration of graphene in the photoanode. Under an optimal conditions, solar cell based on graphene/TiO2 shows power conversion efficiency (PCE) of 4.03%, which is about 26% greater than the cell based on pristine TiO2 electrode (3.20%). A density functional theory was used to compute the band gap of TiO2 and graphene-TiO2 nano clusters. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：34 / 42
页数：9
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