Stable Cesium Formamidinium Lead Halide Perovskites: A Comparison of Photophysics and Phase Purity in Thin Films and Single Crystals

Four types of organic cation-mixed single crystals were successfully synthesized by partially substituting A site cations to investigate the effect of organic cations on structure, optical features, thermal stability, and electrical transport properties.

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Interaction of light with lead halide perovskites: A review

Characterization and Application of Nanomaterials ◽

10.24294/can.v2i2.813 ◽

2019 ◽

Vol 2 (2) ◽

pp. 67

Author(s):

Zhiya Dang ◽

Duc Anh Dinh

Keyword(s):

Thin Film ◽

Thin Films ◽

Light Illumination ◽

Low Light ◽

Practical Applications ◽

Halide Perovskites ◽

Halide Perovskite ◽

First Time ◽

Lead Halide ◽

Sample Environment

Lead halide perovskites are the new rising generation of semiconductor materials due to their unique optical and electrical properties. The investigation of the interaction of halide perovskites and light is a key issue not only for understanding their photophysics but also for practical applications. Hence, tremendous efforts have been devoted to this topic and brunch into two: (i) decomposition of the halide perovskites thin films under light illumination; and (ii) influence of light soaking on their photoluminescence (PL) properties. In this review, we for the first time thoroughly compare the illumination conditions and the sample environment to correlate the PL changes and decomposition of perovskite under light illumination. In the case of vacuum and dry nitrogen, PL of the halide perovskite (MAPbI3–xClx, MAPbBr3–xClx, MAPbI3) thin films decreases due to the defects induced by light illumination, and under high excitations, the thin film even decomposes. In the presence of oxygen or moisture, light induces the PL enhancement of halide perovskite (MAPbI3) thin films at low light illumination, while increasing the excitation, which causes the PL to quench and perovskite thin film to decompose. In the case of mixed halide perovskite ((MA)Pb(BrxI1-x)3) light induces reversible segregation of Br domains and I domains.

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Detection of gamma photons using solution-grown single crystals of hybrid lead halide perovskites

Nature Photonics ◽

10.1038/nphoton.2016.139 ◽

2016 ◽

Vol 10 (9) ◽

pp. 585-589 ◽

Cited By ~ 239

Author(s):

Sergii Yakunin ◽

Dmitry N. Dirin ◽

Yevhen Shynkarenko ◽

Viktoriia Morad ◽

Ihor Cherniukh ◽

...

Keyword(s):

Single Crystals ◽

Halide Perovskites ◽

Lead Halide

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Strain-activated light-induced halide segregation in mixed-halide perovskite solids

Nature Communications ◽

10.1038/s41467-020-20066-7 ◽

2020 ◽

Vol 11 (1) ◽

Author(s):

Yicheng Zhao ◽

Peng Miao ◽

Jack Elia ◽

Huiying Hu ◽

Xiaoxia Wang ◽

...

Keyword(s):

Thin Films ◽

Single Crystals ◽

Scanning Probe Microscopy ◽

Strain Distribution ◽

Scanning Probe ◽

Uniaxial Pressure ◽

Free Standing ◽

Polycrystalline Thin Films ◽

Halide Perovskites ◽

Halide Perovskite

AbstractLight-induced halide segregation limits the bandgap tunability of mixed-halide perovskites for tandem photovoltaics. Here we report that light-induced halide segregation is strain-activated in MAPb(I1−xBrx)3 with Br concentration below approximately 50%, while it is intrinsic for Br concentration over approximately 50%. Free-standing single crystals of CH3NH3Pb(I0.65Br0.35)3 (35%Br) do not show halide segregation until uniaxial pressure is applied. Besides, 35%Br single crystals grown on lattice-mismatched substrates (e.g. single-crystal CaF2) show inhomogeneous segregation due to heterogenous strain distribution. Through scanning probe microscopy, the above findings are successfully translated to polycrystalline thin films. For 35%Br thin films, halide segregation selectively occurs at grain boundaries due to localized strain at the boundaries; yet for 65%Br films, halide segregation occurs in the whole layer. We close by demonstrating that only the strain-activated halide segregation (35%Br/45%Br thin films) could be suppressed if the strain is properly released via additives (e.g. KI) or ideal substrates (e.g. SiO2).

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Defect tolerant device geometries for lead-halide perovskites

Materials Advances ◽

10.1039/d0ma00902d ◽

2021 ◽

Author(s):

Basita Das ◽

Zhifa Liu ◽

Irene Aguilera ◽

Uwe Rau ◽

Thomas Kirchartz

Keyword(s):

Thin Films ◽

Defect Tolerance ◽

Solution Processed ◽

Radiative Lifetimes ◽

Polycrystalline Thin Films ◽

Halide Perovskites ◽

Lead Halide

The term defect tolerance is widely used in literature to describe materials such as lead-halides perovskites, where solution-processed polycrystalline thin films exhibit long non-radiative lifetimes of microseconds or longer. Studies...

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Reflectivity Effects on Pump–Probe Spectra of Lead Halide Perovskites: Comparing Thin Films versus Nanocrystals

ACS Nano ◽

10.1021/acsnano.8b01570 ◽

2018 ◽

Vol 12 (6) ◽

pp. 5719-5725 ◽

Cited By ~ 14

Author(s):

Tufan Ghosh ◽

Sigalit Aharon ◽

Adva Shpatz ◽

Lioz Etgar ◽

Sanford Ruhman

Keyword(s):

Thin Films ◽

Pump Probe ◽

Halide Perovskites ◽

Lead Halide

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Two-Step Synthesis of Bismuth-Based Hybrid Halide Perovskite Thin-Films

Materials ◽

10.3390/ma14247827 ◽

2021 ◽

Vol 14 (24) ◽

pp. 7827

Author(s):

Vanira Trifiletti ◽

Sally Luong ◽

Giorgio Tseberlidis ◽

Stefania Riva ◽

Eugenio S. S. Galindez ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Good Alternative ◽

Bismuth Iodide ◽

Earth Abundant ◽

Low Toxicity ◽

Halide Perovskites ◽

Halide Perovskite ◽

Scalable Methods ◽

Lead Halide

Lead halide perovskites have been revolutionary in the last decade in many optoelectronic sectors. Their bismuth-based counterparts have been considered a good alternative thanks to their composition of earth-abundant elements, good chemical stability, and low toxicity. Moreover, their electronic structure is in a quasi-zero-dimensional (0D) configuration, and they have recently been explored for use beyond optoelectronics. A significant limitation in applying thin-film technology is represented by the difficulty of synthesizing compact layers with easily scalable methods. Here, the engineering of a two-step synthesis in an air of methylammonium bismuth iodide compact thin films is reported. The critical steps of the process have been highlighted so that the procedure can be adapted to different substrates and application areas.

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