Improved efficiency of dye-sensitized solar cell based on randomly ordered pore structure fabricated by dry deposition method

Title
Improved efficiency of dye-sensitized solar cell based on randomly ordered pore structure fabricated by dry deposition method
Author
이선영
Keywords
Dye-sensitized solar cells; Dry deposition; Porous film; TiO2; Polystyrene; TIO2 HOLLOW SPHERES; CONVERSION EFFICIENCY; ROOM-TEMPERATURE; SYSTEM NPDS; PHOTOELECTROCHEMICAL CELL; ELECTRIC-POWER; THIN-FILM; LOW-COST; SIZE; SCATTERING
Issue Date
2017-04
Publisher
ELSEVIER SCIENCE BV
Citation
CURRENT APPLIED PHYSICS, v. 17, No. 4, Page. 433-441
Abstract
Porous TiO2 films were deposited onto FTO (fluorine doped tin oxide) substrate through dry deposition method, and polystyrene (PS) beads used as a sacrificial material. In addition, pore size was controlled by introducing 50-nm- and 300-nm-sized PS beads. Moreover, the improved porous film was obtained by varying weight ratios of TiO2 and PS powders to enhance DSSCs (dye-sensitized solar cell) efficiency. The DSSC with improved porous structure has shown efficiency of 6.8% with weight ratio (71.5%), which higher than that of only TiO2 layer (6.08%) and other compositions. The IPCE analysis showed the maximum absorbance over the wavelength range of 550-800 nm resulted in higher efficiency. EIS results indicated that the electron generation and transfer properties of porous films were better than that of the TiO2 layer only. From photovoltage decay measurement, the carrier lifetime was found to be longer in the porous structure than that of TiO2 layer only. Then, we proposed formation mechanism of porous films and their relation for effective scattering/absorbance of light. Moreover, the porous structure also enhances the specific surface area for higher amount of dye loading. Therefore, deposition of porous films could improve the efficiency of DSSCs using facile process. (C) 2017 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S156717391730007Xhttp://repository.hanyang.ac.kr/handle/20.500.11754/71967
ISSN
1567-1739; 1878-1675
DOI
10.1016/j.cap.2017.01.007
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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