Md. Shahiduzzaman, Toshiharu Sakuma, Tetsuya Kaneko, KojiTomita, Masao Isomura, TetsuyaTaima, Shinjiro Umezu, Satoru Iwamori, "Oblique Electrostatic Inkjet- Deposited TiO2 Electron Transport Layers for Efcient Planar Perovskite Solar Cells", Scientific Reports, 9, DOI:10.1038/s41598-019-56164-w2019.12.20