Md Shahiduzzaman, Hiroto Ashikawa, Mizuki Kuniyoshi, Tetsuya Kaneko, Shinjiro Umezu, Tetsuhiro Katsumata, Satoru Iwamori, Tetsuya Taima, Masato Kakihana, Masao Isomura, Koji Tomita, “ Highly Efficient Planar Perovskite Solar Cells Exploiting a Compact TiO2/Anatase TiO2Single Crystalline Nanoparticles Electron Transport Bilayer”, 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC)(A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), Article number 8548216, pp. 512-517, DOI: 10.1109/PVSC.2018.85482162018.11.26