%0 Journal Article %1 doi:10.1021/acsenergylett.7b01057 %A Hamill, J. Clay %A Schwartz, Jeffrey %A Loo, Yueh-Lin %D 2017 %J ACS Energy Letters %K crystal perovskite single solvent %N 0 %P 92-97 %R 10.1021/acsenergylett.7b01057 %T Influence of Solvent Coordination on Hybrid Organic–Inorganic Perovskite Formation %U http://dx.doi.org/10.1021/acsenergylett.7b01057 %V 0 %X Solution-processed hybrid organic–inorganic perovskites (HOIPs) from organoammonium halide and lead halide precursors form efficacious active layers for photovoltaics, light-emitting diodes, and flexible electronics. Though solvent–solute coordination plays a critical role in HOIP crystallization, the influence of solvent choice on such interactions is poorly understood. We demonstrate Gutmann’s donor number, DN, as a parameter that indicates the coordinating ability of the processing solvent with the Pb2+ center of the lead halide precursor. Low DN solvents interact weakly with the Pb2+ center, favoring instead complexation between Pb2+ and iodide and subsequent crystallization of perovskite. High DN solvents coordinate more strongly with the Pb2+ center, which in turn inhibits iodide coordination and stalls perovskite crystallization. Varying the concentration of high-DN additives in precursor solutions tunes the strength of lead–solvent interactions, allowing finer control over the crystallization and the resulting morphology of HOIP active layers.

@article{doi:10.1021/acsenergylett.7b01057, abstract = { Solution-processed hybrid organic–inorganic perovskites (HOIPs) from organoammonium halide and lead halide precursors form efficacious active layers for photovoltaics, light-emitting diodes, and flexible electronics. Though solvent–solute coordination plays a critical role in HOIP crystallization, the influence of solvent choice on such interactions is poorly understood. We demonstrate Gutmann’s donor number, DN, as a parameter that indicates the coordinating ability of the processing solvent with the Pb2+ center of the lead halide precursor. Low DN solvents interact weakly with the Pb2+ center, favoring instead complexation between Pb2+ and iodide and subsequent crystallization of perovskite. High DN solvents coordinate more strongly with the Pb2+ center, which in turn inhibits iodide coordination and stalls perovskite crystallization. Varying the concentration of high-DN additives in precursor solutions tunes the strength of lead–solvent interactions, allowing finer control over the crystallization and the resulting morphology of HOIP active layers. }, added-at = {2017-12-11T10:05:26.000+0100}, author = {Hamill, J. Clay and Schwartz, Jeffrey and Loo, Yueh-Lin}, biburl = {https://www.bibsonomy.org/bibtex/2fc4bf420a6c95d45c58b0ebebaa623ba/fabianopkm}, description = {Influence of Solvent Coordination on Hybrid Organic–Inorganic Perovskite Formation - ACS Energy Letters (ACS Publications)}, doi = {10.1021/acsenergylett.7b01057}, eprint = {http://dx.doi.org/10.1021/acsenergylett.7b01057}, interhash = {10df813af3d73f5882229b492a2e41cf}, intrahash = {fc4bf420a6c95d45c58b0ebebaa623ba}, journal = {ACS Energy Letters}, keywords = {crystal perovskite single solvent}, number = 0, pages = {92-97}, timestamp = {2017-12-11T10:05:26.000+0100}, title = {Influence of Solvent Coordination on Hybrid Organic–Inorganic Perovskite Formation}, url = {http://dx.doi.org/10.1021/acsenergylett.7b01057}, volume = 0, year = 2017 }