Solid State Technology Volume: 63 Issue: 6 Publication Year: 2020 13008 Futuristic Energy Source Of CTB (Cs 2 TiBr 6 ) Thin Films Based Lead-Free Perovskite Solar Cells: Synthesis And Characterization Verma 1* , A. K. Diwakar 2 , P. Goswami 3 , R. P. Patel 4 , S. C. Das 5 , A. Verma 6 1 Assistant Professor Department of Physics, Kalinga University, Naya Raipur (C.G.) India 2 Assistant Professor Department of Physics, ITM University, Naya Raipur, (C.G.) India 3 Department of Mathematics, Govt. Pt. Jawahar Lal Nehru Arts and Science PG College, Bemetara (C.G.) India 4 Department of Physics, Professional Institute of Engineering & Technology, Vidhan Sabha Road, Murra, Raipur (C.G.) India 5 Department of Physics, Rungta College of Science and Technology, Bhilai (C.G.) India 6 SoS in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur (C. G.), India *Email ID: aloke.verma@kalingauniversity.ac.in Abstract: This work is based on the Lead-free Perovskites Solar Cells (LFPSCs) for the application of photovoltaic (PV). Here, the selection of Lead-free Perovskites Halide, it gives the magnificent properties of optoelectronics, synthesis, most favorable bandgap, and eco- friendly nature. Therefore, we select the CTB for this work and promise to the synthesis of Cesium (Cs) based on highly efficient thin-film solar cells (TFSCs). It having a stable energy level and most promising bandgap of ⁓ 1.8 eV, large carrier-diffusion on the balanced term. First reported CTB thin-film based LFPSCs efficiency up to 3.3%. This work is dedicated to green environmental-based solar cell manufacturing for low cast highly efficient. Keywords: CTB, LFPSCs, Thin-film. I. INTRODUCTION Last few decades, we observed in the solar cell field, day to day new inventions and discoveries, and various emerging work on this field. Here, various types of solar cells are reported like monocrystalline solar cells, polycrystalline solar cells, organic solar cells, inorganic solar cells, perovskite solar cells, and large combinations of solar cells on the base of junction layer etc (Yoon, S., et al., 2013). That is why we work on lead-free perovskite solar cell (LFPSCs) last few works. In this context, now we select a new type of material Cesium and Titanium (Udawatte, C. P., et.al., 2001). Experimental Work Synthesis BST The synthesis of the powder sample of BST is by the ceramic process of CPP method. Ba(NO3)2 (99%, Sigma-Aldrich), Sr(NO3)2 (99%, Sigma-Aldrich), and potassium titanium