Cs<sub>2</sub>PtI<sub>6</sub> Halide Perovskite is Stable to Air, Moisture, and Extreme pH: Application to Photoelectrochemical Solar Water Oxidation

Hamdan, Muhammed; Chandiran, Aravind Kumar

doi:10.1002/anie.202000175

Cited by 41 publications

(56 citation statements)

References 43 publications

(49 reference statements)

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“…Figures 4c and S13b clearly show that 0.22 electrons are transferred from Pt to N, which is consistent with the fact that Cs 2 PtI 6 is a typical n-type material. 51 The resistance of the perovskite shows an ascending trend, which is consistent with test results.…”

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confidence: 88%

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Chen

Lin

et al. 2021

ACS Sens.

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In recent years, the performance research of perovskite materials is not only concentrated in the field of solar cells or optics, but the field of gas sensing has gradually entered the public view. However, the detection of nitric oxide (NO) by lead-free halide perovskites has not yet been reported. Herein, we use Cs 2 PtI 6 to realize the first example of a halide perovskite applied to NO sensing. Due to favoring Pt−N binding, the material has some excellent properties such as a NO detection limit as low as 100 parts-per-billion (ppb), ultrahigh selectivity to NO, and can work at room temperature for more than 2 months. In situ sum frequency generation (SFG) spectra and crystal orbital Hamilton population (COHP) analysis reveal that the strong bonding interaction between Pt 5s and N 2s ensure the high adsorption energy, and Pt 5d electron back donation to N 2p x , N 2p z antibonding causes the conductive change of the sensors. In addition, its flexible wearable technology shows the application potential of the device and promotes the further development of perovskite materials.

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supporting

confidence: 88%

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Chen

Lin

et al. 2021

ACS Sens.

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“…For example, the vacancy‐ordered halides of Sn IV , [11] Se IV , [12] Te IV , [13, 14] and Ti IV , [15] have shown to be promising photovoltaic materials. The analogous variants of heavier transition metals such as Pt IV , [16, 17] and Pd IV , [18] have also been reported. Separately, there has been significant interest in the single‐ion physics of vacancy‐ordered double perovskites and related systems of heavy transition metals.…”

Section: Figurementioning

confidence: 89%

Chemical Control of Spin‐Orbit Coupling and Charge Transfer in Vacancy‐Ordered Ruthenium(IV) Halide Perovskites

et al. 2021

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Vacancy-ordered double perovskites are attracting significant attention due to their chemical diversity and interesting optoelectronic properties. With a view to understanding both the optical and magnetic properties of these compounds, two series of Ru IV halides are presented; A 2 RuCl 6 and A 2 RuBr 6 , where A is K, NH 4 , Rb or Cs. We show that the optical properties and spin-orbit coupling (SOC) behavior can be tuned through changing the A cation and the halide. Within a series, the energy of the ligand-to-metal charge transfer increases as the unit cell expands with the larger A cation, and the band gaps are higher for the respective chlorides than for the bromides. The magnetic moments of the systems are temperature dependent due to a non-magnetic ground state with J eff = 0 caused by SOC. Ru-X covalency, and consequently, the delocalization of metal d-electrons, result in systematic trends of the SOC constants due to variations in the A cation and the halide anion. Remarkable developments in perovskite-based photovoltaics over the last decade have driven the discovery of a wide range of new halide perovskites and related solids. [1-4] These include 3D perovskites with different divalent metals (i.e., Pb II and Sn II), [5, 6] 3D double perovskites with a combination of univalent and trivalent metals (i.e., K I /Bi III and Ag I / Bi III), [7, 8] as well as low dimensional 2D, [9] and 1D perovskites. [10] Progress in this area has also rekindled interest in K 2 Pt IV Cl 6-type vacancy-ordered double perovskites, comprising isolated metal halide octahedra interspersed with mono-valent cation. For example, the vacancy-ordered halides of Sn IV , [11] Se IV , [12] Te IV , [13, 14] and Ti IV , [15] have shown to be promising photovoltaic materials. The analogous variants of

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“…30 Finally, Chen et al reported Cs 2 TiBr 6 PSCs with a stable efficiency of 3.3%, corroborating the promising potential of Tibased vacancy-ordered double halide perovskites in photovoltaic applications. 31 However, these studies mainly focused on a few select TM elements, such as Pt, 32 Ti, 33 and Pd., 34 Although double perovskites exhibit greater stability than HPSCs, they typically have wide band gaps of >1.5 eV, significantly lowering the photovoltaic efficiency. It is therefore necessary to develop a lead-free stable narrow bandgap perovskite material for photovoltaic applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Novel Lead-Free Material Cs₂PtI₆ with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application

Yang

Wang

Zhao

et al. 2020

ACS Appl. Mater. Interfaces

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Lead halide perovskite has in recent years gained widespread interest due to its excellent physical and chemical properties, as well as superior optoelectronic performance. However, some restrictions still preclude full industrialization of the material, in particular toxicity issues and instability as a result to sensitivity to humidity. Lead-free all-inorganic double perovskite materials have thus recently become a focus of research. Herein, a new narrow bandgap lead-free double perovskite solar cell with a high-quality Cs 2 PtI 6 film is proposed. It exhibits an optical bandgap of 1.37 eV, absorption within a wide range of wavelengths, and a high absorption coefficient. Following optimization, the device displays a best power conversion efficiency of 0.72% with an opencircuit voltage of 0.73 V, a short-circuit current of 1.2 mA/cm 2 , and a fill factor of 0.82. Crucially, it also demonstrates excellent stability when exposed to extreme conditions such as high humidity, high temperature, and UV-light irradiation. Stability tests show that the PSCs can retain almost 80% of the original efficiency over 60 days stored in ambient temperature without any encapsulation, boosting prospects for applications of lead-free perovskite solar cells.

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Cs₂PtI₆ Halide Perovskite is Stable to Air, Moisture, and Extreme pH: Application to Photoelectrochemical Solar Water Oxidation

Cited by 41 publications

References 43 publications

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Chemical Control of Spin‐Orbit Coupling and Charge Transfer in Vacancy‐Ordered Ruthenium(IV) Halide Perovskites

Novel Lead-Free Material Cs₂PtI₆ with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application

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Cs2PtI6 Halide Perovskite is Stable to Air, Moisture, and Extreme pH: Application to Photoelectrochemical Solar Water Oxidation

Cited by 41 publications

References 43 publications

Lead-Free Halide Cs2PtI6 Perovskite Favoring Pt–N Bonding for Trace NO Detection

Lead-Free Halide Cs2PtI6 Perovskite Favoring Pt–N Bonding for Trace NO Detection

Chemical Control of Spin‐Orbit Coupling and Charge Transfer in Vacancy‐Ordered Ruthenium(IV) Halide Perovskites

Novel Lead-Free Material Cs2PtI6 with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application

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Cs₂PtI₆ Halide Perovskite is Stable to Air, Moisture, and Extreme pH: Application to Photoelectrochemical Solar Water Oxidation

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Lead-Free Halide Cs₂PtI₆ Perovskite Favoring Pt–N Bonding for Trace NO Detection

Novel Lead-Free Material Cs₂PtI₆ with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application