Band-gap engineering for multi-colored perovskite solar cell windows
Tay, Yu Xian
Date of Issue2016-04-01
School of Materials Science and Engineering
Solar energy is the largest renewable energy present that has yet to be fully harvested. The large area needed for solar cell farms have been one of the many problems faced currently. A solution suggests using solar cells as windows, enabling direct striking of the sunlight and solving the problem of limited space. The devices must be able to achieve high efficiency and transparency at the same time. Experiments have been carried out to compare the effects of varying fabrication variables. It is determined that planar TiO2 layer is preferred due to its dense structure. Solvent engineering is preferred as the additive is able to stop nucleation during crystal growth, producing crystals with similar sizes. The compact perovskite layer acts as a barrier between Spiro-OMeTAD and TiO2 layer, promoting efficiency. Lastly, mixed halide CH3NH3PbI1.5Br1.5 perovskite solar cell is chosen as it provides large amount of transparency and possesses huge potential in achieving high efficiency. Result obtained is not able to fully explain the effect of mixed halide as only 1 mixed halide composition is considered. Also, the top electrode used is opaque, deviating from the objectives. Further researches can be done on increasing the variety of compositions and top electrode material used.
Final Year Project (FYP)
Nanyang Technological University