High quality, high purity guanidinium iodide
Used to enhance carrier lifetimes and open circuit voltages in perovskite solar cells
It has been demonstrated that guanidinium iodide (GI) based additives show significant enhancement in carrier lifetimes and open-circuit voltages in hybrid organic-inorganic perovskite solar cells, due to the hydrogen bonding capability of the GI molecule .
Speculation is that hydrogen bonding allows for effective passivation of under-coordinated iodine species located at grain boundaries - both at the surface and internally within the bulk.
Superior performance with cell power conversion efficiencies greater than 17% and an open-circuit voltage of 1.1 V were achieved with device structure ITO/TiO2/perovskite/Spiro-OMeTAD/Au.
|Molecular weight||186.98 g/mol|
|Synonyms||Guanidine hydroiodide, Diaminomethaniminium iodide, Guanidine monohydroiodide, GI|
|Classification / Family||Guanidinium halides, Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs|
|Melting point||194-199 °C|
Literature and reviews
- Guanidinium: A Route to Enhanced Carrier Lifetime and Open-Circuit Voltage in Hybrid Perovskite Solar Cells, N. De Marco et al., Nano Lett., 16 (2), 1009–1016 (2016); DOI: 10.1021/acs.nanolett.5b04060.
- Guanidinium benefit, O. Graydon, Nat. Photonics 10, 145 (2016); doi:10.1038/nphoton.2016.35.
- Synthesis, Crystal Structures, Optical Properties, and Phase Transitions of the Layered Guanidinium-Based Hybrid Perovskites [C(NH2)3]2MI4; M = Sn, Pb, M. Daub et al., Eur. J. Inorg. Chem., 1120–1126 (2017); DOI: 10.1002/ejic.201601499.
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