2022
DOI: 10.1021/acs.jpcc.2c07613
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Illustrating the Key Role of Hydrogen Bonds in Fabricating Pure-Phase Two-Dimensional Perovskites

Abstract: Two-dimensional (2D) layered perovskites consisting of multiple quantum wells are emerging as functional materials to achieve high-performance and stable optoelectronic devices. Pure-phase 2D perovskites provide a platform to investigate their fundamental properties; however, the deposition of pure-phase films remains a scientific challenge. Herein, we reveal the critical role of hydrogen bonds in fabricating pure-phase 2D perovskites. We demonstrate that the phenylalkylammonium molecules exhibit different hyd… Show more

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Cited by 3 publications
(3 citation statements)
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“…24,25 In 2022, Huang and co-workers successfully fabricated one species of PPQP (n = 2) thin films by utilizing the strong hydrogen bonds between the bulky and smallish cations. 26 Recently, numerous efforts have been devoted to pursuing the final uniform QW distribution in one sequential perovskite film. However, to date, the controllable fabrication of different n-value PPQP thin films remains an extremely formidable challenge.…”
Section: ■ Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…24,25 In 2022, Huang and co-workers successfully fabricated one species of PPQP (n = 2) thin films by utilizing the strong hydrogen bonds between the bulky and smallish cations. 26 Recently, numerous efforts have been devoted to pursuing the final uniform QW distribution in one sequential perovskite film. However, to date, the controllable fabrication of different n-value PPQP thin films remains an extremely formidable challenge.…”
Section: ■ Introductionmentioning
confidence: 99%
“…Pure-phase quasi-2D perovskites (PPQPs) with high color purity can ultimately satisfy a wide range of the color gamut of light, which also provides a platform to investigate their fundamental properties. Despite the great success that has been made in synthesizing the PPQP single crystals (especially for n = 1, 2, and 3) by tuning the stoichiometric amounts of precursor, there is still a crucial and difficult issue to realize the deposition of PPQP thin films. , In 2022, Huang and co-workers successfully fabricated one species of PPQP ( n = 2) thin films by utilizing the strong hydrogen bonds between the bulky and smallish cations . Recently, numerous efforts have been devoted to pursuing the final uniform QW distribution in one sequential perovskite film.…”
Section: Introductionmentioning
confidence: 99%
“…In recent years, several groups have reported the influence of the cation alkyl chain length on device performance. For instance, a higher external quantum efficiency of light-emitting diodes was observed for quasi-2D perovskites containing phenylalkylammonium-based cations with longer alkyl chains that established strong hydrogen bonding with the formamidinium cation . In another study, a series of linear aliphatic alkylammonium cation spacers with different chain lengths were investigated in quasi-2D perovskite solar cells, and the device efficiency was shown to increase with increasing the length of cations …”
Section: Introductionmentioning
confidence: 99%