Bulk Assembly of Corrugated 1D Metal Halides with Broadband Yellow Emission

Lin, Haoran; Zhou, Chenkun; Neu, Jennifer; Zhou, Yan; Han, Dan; Chen, Shiyou; Worku, Michael; Chaaban, Maya; Lee, Sujin; Berkwits, Ella; Siegrist, T.; Du, Mao‐Hua; Ma, Biwu

doi:10.1002/adom.201801474

Cited by 67 publications

(52 citation statements)

References 37 publications

(4 reference statements)

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“…In addition, lower dimensionality system has lower deformation energy and thus lead to stronger electron-phonon interaction, which makes it easier to generate self-trapped excitons [20]. In the case of 1D perovskites, PL spectrum is dominated by the self-trapped excitons with broadband white-light emission and large Stokes shift [21][22][23]. Overall, 1D perovskites hold great potentials in the application of broadband polarization sensitive optoelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Optical anisotropy of one-dimensional perovskite C₄N₂H₁₄PbI₄ crystals

Cheng

Zhou

et al. 2020

J. Phys. Photonics

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Optical anisotropy is essential for the polarization-sensitive optoelectronic devices. Recently, in-plane anisotropy is demonstrated in various 2D layered materials. It has been proved that organic-inorganic perovskites possess excellent optical properties; however, the anisotropy of organic-inorganic perovskites is rarely reported because of the in-plane isotropic structure. Here, we report a large optical anisotropy of one-dimensional organic lead iodine perovskites C 4 N 2 H 14 PbI 4 crystals, including emission, excitation and reflection anisotropy. An emission linear dichroic ratio of 5.5 and an excitation linear dichroic ration of 7 are achieved respectively, which are much larger than the inplane anisotropy of 2D layered materials. The large optical anisotropy can be ascribed to the anisotropic dipole moment in the unique 1D chain structure. In addition, the PL of the 1D C 4 N 2 H 14 PbI 4 crystal is dominated by the broadband self-trapped exciton emission due to the quantum confinement effect and strong electron-phonon interaction. Our results advocate that 1D perovskites are promising in the application of broadband polarization-sensitive optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Optical anisotropy of one-dimensional perovskite C₄N₂H₁₄PbI₄ crystals

Cheng

Zhou

et al. 2020

J. Phys. Photonics

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“…Notably, at RT the recorded lifetime is much longer than those in QDs (Quantum dots) materials, with values of few ns, 38 1D strong light emitting metal halide materials, such as C 4 N 2 H 14 PbBr 4 with recorded values of few tens of ns, 32 C 5 H 16 N 2 Pb 2 Br 6 with a lifetime of about one hundred ns,31 …”

mentioning

confidence: 98%

Water-Stable 1D Hybrid Tin(II) Iodide Emits Broad Light with 36% Photoluminescence Quantum Efficiency

Spanopoulos

Hadar

et al. 2020

J. Am. Chem. Soc.

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The optical and light emission properties of tin and lead halide perovskites are remarkable because of the robust room temperature performance, broad wavelength tunability, high efficiency and good quenching-resistance to defects. These highly desirable attributes promise to transform current light emitting devices, phosphors and lasers. One disadvantage in most of these materials is the sensitivity to moisture. Here we report a new air-stable one-dimensional (1D) hybrid lead-free halide material (DAO)Sn 2 I 6 (DAO: 1,8-octyldiammonium) that is resistant to water for more than 15h.The material exhibits a sharp optical absorption edge at 2.70 eV and a strong broad orange light emission centered at 634 nm, with a full width at half maximum (FWHM) of 142 nm (0.44 eV). The emission has a long photoluminescence (PL) lifetime of 582 ns, while the intensity is constant over a very broad temperature range (145-415 K) with a photoluminescence quantum yield (PLQY) of at least 20.3% at RT. Above 415 K the material undergoes a structural phase transition from monoclinic (C2/c) to orthorhombic (Ibam) accompanied by a red shift in the bandgap and a quench in the photoluminescence emission. Density functional theory calculations support the trend in the optical properties and the 1D electronic nature of the structure, where the calculated carrier effective masses along the inorganic chain are significantly lower than those perpendicular to the chain. Thin films of the compound readily fabricated from solutions exhibit the same optical properties, but with improved PLQY of 36%,

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“…42 Previously, it was also reported that low-dimensional lead halide perovskites exhibited broad band emission due to the formation of self-trapped excitons. 43,44 Due to the large size of the ethylammonium cation (EA + ), there is a possibility of Jahn-Tellerlike octahedral distortion, 45 which is responsible for generation of self-trapped excitons. In the EAPbBr 3 @MOG composite, the tail spans 450 nm to beyond 520 nm and is attributed to the formation of self-trapped excitons.…”

Section: Resultsmentioning

confidence: 99%