Organic-inorganic solar cell

Abstract

The need of energy has increased tremendously in previous years due to industrial, economic development and increase in living standards of people. Fossil fuels are depleting fast due to huge amount of consumption and therefore renewable energy is need of the hour. The sun is one of the most reliable, sustainable and long term source of energy. Solar cells convert solar energy into electricity and are based on photovoltaic e_ect. Many types of solar cells are under research and development and at present single crystalline solar cells with PCE of 30% are widely used for converting solar energy into commercially available electricity but it has high manufacturing cost. Another type of direct bandgap and high PCE based solar cell is gallium arsenide but material cost is too high. Therefore development of new solar cell technologies with low production cost through use of inexpensive and abundant materials is need of the hour. DSCs and Organic-Inorganic Perovskite solar cells overcome the above mentioned drawbacks. Methylammonium Lead Iodide(CH3NH3PbI3) is the perovskite which satis_es all the requirement of an e_cient light harvesting materials in the cell structure. The reported e_ciency of cell with this perovskite is upto 20%. Major drawback of the Perovskite solar cell is the presence Lead in the light harvester layer which is toxic in nature, another drawback is the instability in presence of humidity and high temeperatures. The structure of our cell is FTO=TiO2 nanorods=MAPI=HTM/Al. With the goal of fabricating stable and less toxic perovskite we studied the performance of solar cells fabricated with light harvester as Methylammonium Bismuth Iodide ((CH3NH3)3Bi2I9). This perovskite has Bismuth which is less toxic in nature and comaparatively more stable in ambient conditions. The cell has following layers with Bismuth based perovskite as light harvesting layer, FTO=TiO2nanorods=MABI= Spiro-MeOTAD=Au. The e_ciency of this cell was calculated after one week of fabrication and it showed 0.124% e_ciency.