Abstract
We have synthesized and studied a specific family of disulfide bridge based 2D organic inorganic hybrid perovskites using the cation, cystamine [2,2′-dithiobis(ethylammonium), abbreviated as SS] in the three lead halide (X = I, Br, and Cl) based systems, and explored their unique photo-physical properties. Green, blue, and white emissions are noted in I, Br, and Cl based systems, respectively. The experimental observations are compared with the results of first principles DFT calculations. The role of the halide ion (X) in the [Pb-X4] cages on the luminescence of the disulfide bridge based hybrid system is elucidated, and the corresponding systematics are analyzed.
Highlights
Development of energy efficient devices such as non-linear optical switches, light emitting diodes, resistive switches, and lasing systems has attracted significant attention in recent years due to the ever-growing demand for such device systems by multiple application sectors
Amongst the various classes of materials being explored in this context, the organic-inorganic hybrid perovskites (OIHPs) represent a rapidly growing class of materials with exceptional, intriguing, and highly tunable device-worthy properties, especially for solar cells and other optoelectronic devices.[1,2,3,4,5,6,7]
The 2D based OIHPs containing aliphatic cations have been extensively explored in recent years, and promising materials have emerged with greater material synergetic.[12,22]
Summary
Development of energy efficient devices such as non-linear optical switches, light emitting diodes, resistive switches, and lasing systems has attracted significant attention in recent years due to the ever-growing demand for such device systems by multiple application sectors. The vibrational spectroscopy studies using FTIR measurements on the perovskite systems as well as the respective organic salts were conducted on crystals crushed into powder which were mixed with high purity KBr to make a pellet; the details are presented in Fig. S3 of the supplementary material.
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