Voltage and Power Conversion Performance of Bi‐function ZrO2:Er3+/ Yb3+ Assisted and Co‐sensitized Dye Sensitized Solar Cells for Internet of Things Applications
Meenakshamma Ambapuram, Muni Mounika Parnapalli, GURULAKSHMI MADDALA, SUSMITHA KALVAPALLI, HARANATH D, LALIT GOSWAMI, GOVIND GUPTA, SOMESHWAR POLA, Raghavender Mitty- Physical and Theoretical Chemistry
- Atomic and Molecular Physics, and Optics
The giant power conversion efficiency is achieved by using bifunction ZrO2:Er3+ /Yb3+assisted co‐sensitised dye sensitized solar cells. The evolution of crystalline structure, its microstructure is examined through X‐ray diffraction, scanning electron microscopy studies. The bi‐functional behaviour of ZrO2:Er3+/Yb3+ as upconversion, light scattering is confirmed by emission and diffused reflectance studies. The bi‐function ZrO2:Er3+/Yb3+ (pH=3) assisted photoanode is co‐sensitized by use of N719 dye, squaraine SPSQ2 dye and is sandwiched with Platinum based counter electrode. The fabricated DSSC exhibited a giant power conversion efficiency of 12.35% with VOC of 0.71 V, JSC of 27.06 mA/cm2, FF of 0.63. The results, which motivated the development of a small DSSC module, gave 6.21% and is used to drive a tiny electronic motor in indoor and outdoor lighting conditions. Small‐area DSSCs connected in series have found that a VOC of 4.52 V is sufficient to power up Internet of Things (IoT) devices.