jp8b00192_si_001.pdf (122.67 kB)
Flex-Mode Mechatronic Functionality of Lead Iodide Hybrid Perovskite Systems
journal contribution
posted on 2018-02-15, 00:00 authored by Aniruddha Basu, Prachi Kour, Swati Parmar, Rounak Naphade, Satishchandra OgaleThe
mechatronic functionality of lead iodide hybrid perovskite
thin films grown on the flexible substrate is investigated via the
study of current-perpendicular-to-plane charge transport modulation
under flex-mode compressive and tensile strains (CS and TS) for multiple
flexing cycles. It is shown that the transport is significantly, reversibly,
and asymmetrically modulated. Typically, for a strain of 0.088% (0.23%),
a remarkable current modulation of +196% (+393%) is achieved for compressive
strain and −49% (−53%) for tensile strain at an applied
potential of 1 V. For low levels of bending, the response is robust
for a large number of bending cycles. The effects of the change of
organic cation from methylammonium to formamidinium and the grain
size on the response are also examined. A comparative study of the
structural, morphological, and optical properties of the pristine
sample and the samples subjected to multiple bending cycles is performed
to understand and elucidate the possible mechanisms of the strain-induced
changes in the transport properties.