Influence of Anti-reflecting Nature of MgF2 Embedded Electrospun TiO2 Nanofibers Based Photoanode to Improve the Photoconversion Efficiency of DSSC

Pratheep Panneerselvam 1

Vignesh Murugadoss 1, 2

Vijayakumar Elayappan 1, 3

Na Lu 4, Email

Zhanhu Guo 2, Email 

Subramania Angaiah 1, Email

1 Electro-Materials Research Laboratory, Centre for Nanoscience and Technology,Pondicherry University, Puducherry-605 014, India
2 Integrated Composites Laboratory, Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
3 Department of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk-38541, Republic of Korea
4 School of Materials Engineering, Purdue University, Indiana 47907-2045, USA

Abstract

TiO2 nanofibers (NFs) embedded with different weight percentages of magnesium fluoride (MgF2) are fabricated by electrospinning technique to use as an anti-reflecting photoanode to enhance the power conversion efficiency (PCE) of DSSC. The thermal behaviour of TiO2/PVP and TiO2/PVP/MgF2 precursors are studied by TG/DTA analysis. The MgF2 embedded electrospun TiO2 NFs has mixed phases of anatase and rutile and their weight fractions are investigated by X-ray diffraction analysis. The MgF2 embedded electrospun TiO2 NFs exhibited high dye loading compared to bare TiO2 NFs. The surface morphology of MgF2 embedded electrospun TiO2 NFs is investigated by FE-SEM and TEM analysis. Among the different wt.% of MgF2 embedded electrospun TiO2 NFs, 10 wt% MgF2 embedded TiO2 NFs based DSSC enhanced the light harvesting effectively and thereby increase the PCE to 5.56%, which is an increase of 17% compared to bare electrospun TiO2 NFs based DSSC (4.76%).

Influence of Anti-reflecting Nature of MgF2 Embedded Electrospun TiO2 Nanofibers Based Photoanode to Improve the Photoconversion Efficiency of DSSC