This research is based on the development of efficient and cost-effective perovskite solar cells for a replacement of silicon solar cells. The purpose of this research is to assemble more efficient prototype cells for the conversion of sunlight into electricity through various processes in effort to develop for real life applications. Perovskite solar cell has been receiving significant attention among the energy researchers due to its outstanding properties, namely cost effectiveness, simple production, and intriguing semiconductor characteristics such as high mobility, high absorption length and long carrier diffusion length. The main component of this solar cell is the methylammonium lead halide (CH3NH3PbX3, X = F, CI, Br or I) functioned as the light receptor capable of receiving a wide wavelength, ranging from the ultraviolet to the infrared. The perovskite solar cells are assembled with electron transporting material (ETM) and hole transporting material (HTM) which have suitable energy level with perovskite materials. Most substances of electron transporting material are n-type semiconductors such as Zinc Oxide (ZnO), Titanium Dioxide (TiO2), and Fullerene derivatives. Meanwhile, the substances of hole transporting material are mostly p-type semiconductors like conductive polymer (Spiro-OMeTAD) or Copper Oxide (CuO). These substances must have thicknesses and surface properties suitable for charge transport from perovskite which have great impacts on the efficiency of converting sunlight into usable electricity.
Solar cells of perovskite semiconductor (ABX3) in Figure 1.1.1 were initially discovered in 2009 by a group of Japanese researchers led by Professor Miyasaka, reporting the efficiency of electricity production at 3.81%  using Organoleadtriiodide (CH3NH3Pbl3) as the light receptor. This discovery has interested researchers in several countries and promoted collaborations on the knowledge and technology exchange among them in the light of solar cell efficiency enhancements from the past to the present as shown in Figure 1.1.2.
Principal Investigator: Assistant Professor Dr. Supab Choopun 1)