J Phys Condens Matter 2021 May 10. Epub 2021 May 10.
Faculty of Science, Zhejiang Sci-Tech University, Zhejiang Sci-Tech University, Hangzhou 310018, China., Hangzhou, Zhejiang, Hangzhou 310018, CHINA.
High-quality MAPbX(X=I, Br, Cl) single crystals with a desirable size were grown through an inverse temperature crystallization method. Systematically measurements of current-voltage (-) hysteresis show that the hysteresis is strongly dependent on the measuring protocol, including scan rate and light illumination condition, which reveals the competition of three main factors that influence the charge dynamics in different regimes, defect trap, MAdipoles rotation, and ion migration. In the dark, defect trapping is the dominant charge transport dynamics at low bias in the MAPbI, while the MAdipole rotation is significant in MAPbBr, and ion migration occurs in MAPbCl. Read More