Hole-induced polymerized interfacial film of polythiophene as co-sensitizer and back-electron injection barrier layer in dye-sensitized TiO2 nanotube array
- 저자
- Nabeen K*. Shrestha*, Seog Joon Yoon, Chinna Bathula, Henry Opoku, Yong-Young Noh*
- 저널명
- Journal of Alloys and Compounds, 781, 589-594 (2019)
- 년도
- 2019
- Link
- https://doi.org/10.1016/j.jallcom.2018.12.048 153회 연결
[Abstract]
In this work, we demonstrate that an ultra-thin film of polythiophene deposited interfacially via hole-induced polymerization on the surface of dye-sensitized TiO2 nanotube array acts as co-sensitizer, and hinders back-electron transfer in a DSSC. Consequently, the dark current, and the recombination reactions can be suppressed, leading to an improved number of electron density at the TiO2 array electrode. Thus, an enhanced photocurrent, and power conversion efficiency of the device is achieved. This logical concept is experimentally justified, and the device, after polythiophene interfacial treatment, demonstrates an enhanced power conversion efficiency by the factor of 39.19%.