EN02.12.07 : Titanium-Based Halide Perovskite Thin Films for Photovoltaic Applications

5:00 PM–7:00 PM Apr 5, 2018

PCC North, 300 Level, Exhibit Hall C-E

Min Chen1 Yuanyuan Zhou1 Minggang Ju2 Xiao Cheng Zeng2 Nitin Padture1

1, Brown University, Providence, Rhode Island, United States
2, University of Nebraska, Lincoln, Lincoln, Nebraska, United States

Lead-based halide perovskites have demonstrated superior optoelectronic properties since the emergence of perovskite solar cells (PSCs). However, the toxicity and phase stability of lead halide perovskite brings inevitable concerns with the practical application for the solar panel. Based on the environmental friendly element of Titanium (Ti), we have predicted a series of Ti vacancy-ordered double perovskite compounds, Cs2TiI6, Rb2TiI6, K2TiI6 and In2TiI6, which possess optimal bandgap and suitable absorption. Here, we successfully synthesis the Titanium-based materials which indicates plausible photovoltaic applications because of the proper band-gap range. Furthermore, we prepared the pinhole-free titanium-based thin film by the evaporation method. The electrons/holes diffusion length of such thin films with proper crystallographic textures illustrates indicated the possible construction of planer solar cell. Thus, this work provides new direction in the design and development of high performance Ti-based thin-film PSCs of the future,