Giant optical anisotropy in a quasi-one-dimensional crystal

Niu, Shanyuan; Joe, Graham; Zhao, Huan; Zhou, Yucheng; Orvis, Thomas; Huyan, Huaixun; Salman, Jad; Mahalingam, Krishnamurthy; Urwin, Brittany; Wu, Jiang-Bin; Liu, Yang; Tiwald, Thomas E.; Cronin, Stephen B.; Howe, Brandon M.; Mecklenburg, Matthew; Haiges, Ralf; Singh, David J.; Wang, Han; Kats, Mikhail A.; Ravichandran, Jayakanth

doi:10.1038/s41566-018-0189-1

Cited by 296 publications

(323 citation statements)

References 35 publications

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“…BaZrS 3 and CaZrS 3 were found to crystallize in distorted perovskite structure with a bandgap of 1.73 and 1.90 eV, respectively, whereas both SrZrS 3 and SrTiS 3 have a needle‐like phase. Some recent reports pointed out BaTiS 3 and SrTiS 3 exhibit narrow bandgaps making them unsuitable for single‐junction applications but probably for tandem cells to capture the long‐wave photons. The Raman, PL, X‐ray diffraction (XRD), UV–Vis, and scanning electron microscopy (SEM) analysis of the BaZrS 3 compound were reported (see Figure ).…”

Section: Experimental Studies: Synthesis Methods For Oxy‐chalcogenidesmentioning

confidence: 99%

Chalcogenide Materials and Derivatives for Photovoltaic Applications

2019

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Chalcogenide AB(S,Se)3 materials have recently attracted increased attention as they could simultaneously solve both the stability and toxicity issues faced by conventional perovskite solar cells. Computer‐aided design of metal chalcogenide semiconductors has experienced important progress over the past few years, leading to the discovery of very promising AB(S,Se)3 compounds and derivatives for application as absorbers in thin‐film photovoltaic devices. Experimental evidence demonstrates that the synthesis of such compounds is possible, confirming the theoretical predictions, although more research work needs to be done to further investigate the optoelectrical properties of the corresponding thin films. With the aim to provide an exhaustive starting point to further develop chalcogenide absorbers and related devices, this Review presents both an overview of the predicted chalcogenide materials and interesting derivatives for thin‐film solar cells applications, as well as a summary of the synthesis techniques developed so far to prepare such materials. The possible challenges that can be encountered during the development of chalcogenide‐based solar cells are also discussed.

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Section: Experimental Studies: Synthesis Methods For Oxy‐chalcogenidesmentioning

confidence: 99%

Chalcogenide Materials and Derivatives for Photovoltaic Applications

2019

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“…The structural and physical properties show little degradation four years after the synthesis (see [30]. Meng et al [31] studied the BaZr1-xTixS3 alloy system, suggesting a limited concentration range before phase separation takes place.…”

Section: Introductionmentioning

confidence: 99%

Realization of BaZrS3 chalcogenide perovskite thin films for optoelectronics

et al. 2020

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BaZrS3 is a prototypical chalcogenide perovskite, an emerging class of unconventional semiconductor. Recent results on powder samples reveal that it is a material with a direct band gap of 1.7-1.8 eV, a very strong light-matter interaction, and a high chemical stability. Due to the lack of quality thin films, however, many fundamental properties of chalcogenide perovskites remain unknown, hindering their applications in optoelectronics. Here we report the fabrication of BaZrS3 thin films, by sulfurization of oxide films deposited by pulsed laser deposition. We show that these films are n-type with carrier densities in the range of 10 19 -10 20 cm -3 . Depending on the processing temperature, the Hall mobility ranges from 2.1 to 13.7 cm 2 /Vs. The absorption coefficient is > 10 5 cm -1 at photon energy > 1.97 eV. Temperature dependent conductivity measurements suggest shallow donor levels. By assuring that BaZrS3 is a promising candidate, these results potentially unleash the family of chalcogenide perovskites for optoelectronics such as photodetectors, photovoltaics, and light emitting diodes.

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“…Recently, our group reported a polarization sensitive photodetector based on 2D perovskite (iso-BA) 2 PbI 4 thanks to the in-plane anisotropy, which indicates that organic-inorganic hybrid perovskites can provide the merit of excellent optical properties and anisotropy simultaneously [18]. Compared with 2D configuration, 1D perovskites have unique chain crystal structure and are believed to provide a much higher anisotropy [19]. 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].…”

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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Giant optical anisotropy in a quasi-one-dimensional crystal

Cited by 296 publications

References 35 publications

Chalcogenide Materials and Derivatives for Photovoltaic Applications

Chalcogenide Materials and Derivatives for Photovoltaic Applications

Realization of BaZrS3 chalcogenide perovskite thin films for optoelectronics

Optical anisotropy of one-dimensional perovskite C₄N₂H₁₄PbI₄ crystals

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Giant optical anisotropy in a quasi-one-dimensional crystal

Cited by 296 publications

References 35 publications

Chalcogenide Materials and Derivatives for Photovoltaic Applications

Chalcogenide Materials and Derivatives for Photovoltaic Applications

Realization of BaZrS3 chalcogenide perovskite thin films for optoelectronics

Optical anisotropy of one-dimensional perovskite C4N2H14PbI4 crystals

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Optical anisotropy of one-dimensional perovskite C₄N₂H₁₄PbI₄ crystals