Order Code: M2072A1Manual
|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|
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.
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.