Journal
CRYSTAL GROWTH & DESIGN
Volume 20, Issue 2, Pages 1009-1015Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.9b01338
Keywords
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Funding
- China Postdoctoral Science Foundation [2017M612173]
- Natural Science Foundation of Shandong Province [ZR2017LB003]
- National Natural Science Foundation of China [21201080]
- Science and Technology Project of University of Jinan [XKY1726]
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The environmental toxicity of Pb in inorganic-organic hybrid perovskite presents a major hurdle to commercialization, which has triggered intense research on exploring Pb-free alternatives. Soft interaction, especially Coulomb interaction not only enriching the synthesis strategy but endowing a unique property to the derived materials, is appealing for constructing Pb-free alternatives; however, less has been reported. We herein demonstrate the construction of a Sb-based hybrid perovskite-like semiconductor (3-phenylpyridin-1-ium)SbI4 (denoted as 3ppi-SbI4) via the Coulomb interaction strategy. Therein, the zigza (SbI4)(-) chains interact with the 3ppi countercations through Coulomb interaction only in the crystal lattice. It has good moisture, sunlight, and UV light stabilities. Further, 3ppi-SbI4 exhibits excellent light absorption, direct band gap feature, good photoconduction, and excellent repeatability of photocurrent, which all imply its potential as a Pb-free, light-absorbing candidate for optoelectronic application. Theoretical calculations disclose that the photoresponse is mainly ascribed to the electron transitions within (SbI4)(-) chains, as well as between inorganic and organic moieties.
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