Temperature dependent phase transitions and their relation to isosbestic point formation. Case study of C(NH2)3PbI3

Bukleski, Miha; Dimitrovska-Lazova, Sandra; Aleksovska, Slobotka

doi:10.1016/j.saa.2021.120462

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…Based on the spectrum recorded at low temperature and the one recorded at room temperature, it is evident that a phase transition occurs in DMAPbI3. The results involving phase transitions in perovskite materials, as published in the literature, [29][30][31] support the conclusion that there are two different phases present at these two temperatures. The position of the bands and their interchange (especially of the banding CH3 and the stretching and banding NH2 vibrations) are clear indications that the phase transition occurs because of the rotation of the CH3 and NH2 groups in the crystal structure of the perovskite.…”

Section: Infrared Spectra Analysissupporting

confidence: 74%

Synthesis, characterisation and voltammetric study of dimethylammonium lead iodide perovskite

Sela,

Stojanov,

Cheliku Ramadani

et al. 2024

Maced. J. Chem. Chem. Eng.

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In the last decade, the most investigated perovskite materials are the hybrid organic-inorganic perovskites (HOIPs) due to their optoelectronic properties and possible application in the production of photovoltaics. This interest has led to an ongoing search for new HOIP variants, alongside thorough investigations of the properties of existing HOIPs. That is why our research in the field of organic-inorganic perovskites is aimed at the synthesis, characterization, and investigation of the electrochemical properties of dimethylammonium lead iodide (DMAPbI3) using voltammetric studies. A modified synthesis of DMAPbI3, differing slightly from the one described in the literature, was performed by combining stoichiometric amounts of lead iodide (PbI2) and dimethylammonium iodide (DMAI) dissolved in acetonitrile. After conducting controlled evaporation, a yellow crystalline powder of DMAPbI3 was obtained. The identity and purity of the obtained compound were confirmed by powder X-ray diffraction (PXRD), infrared (IR) and Raman spectroscopy, and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX). Investigations on the electrochemical properties of DMAPbI3 by cyclic voltammetry were performed with dichloromethane (DCM) and tetrabutylammonium chloride (TBAC) as the electrolyte. A paraffin-impregnated graphite electrode (PIGE) was used as a working electrode, on which the perovskite microparticles were immobilized. The electrochemical activity of DMAPbI3 is recognized through an intense, broad, and irreversible anodic peak attributed to the oxidation of the constituents to different possible products and the decomposition of the perovskite structure.

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Section: Infrared Spectra Analysissupporting

confidence: 74%

Synthesis, characterisation and voltammetric study of dimethylammonium lead iodide perovskite

Sela,

Stojanov,

Cheliku Ramadani

et al. 2024

Maced. J. Chem. Chem. Eng.

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“…In a thermal transition, an isosbestic point may appear between a new band and a vanishing old band, which can be used as an indicator of phase transition and can reveal the transition temperature (mid-point of the structure transition). 42–46 Therefore, both the unlabeled and CC-labeled strands have changed from the folded state (i-motif structure) to the unfolded state (random coil) at the temperature ranging from 25 °C to 90 °C, as indicated by the temperature-dependent FTIR spectra. This process seems like a typical two-state transition.…”

Section: Resultsmentioning

confidence: 99%

Site specifically probing the unfolding process of human telomere i-motif DNA using vibrationally enhanced alkynyl stretch

Dong,

Yu,

Zhao

et al. 2024

Phys. Chem. Chem. Phys.

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“…In fact, there are three main-types of crystal structure in perovskites: cubic, tetragonal and orthorhombic. Orthorhombictetragonal-cubic phase transitions were investigated experimentally and analyzed theoretically in [13]. Perovskites offer high absorption coefficient, which makes it useful as absorber materials.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the ZnO and CH3NH3PbI3 as Emitter Layer for Silicon Based Heterojunction Solar Cells

Gulomov¹,

Accouche²,

Алиев³

et al. 2023

Computers, Materials &Amp; Continua

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Today, it has become an important task to modify existing traditional silicon-based solar cell factory to produce high-efficiency silicon-based heterojunction solar cells, at a lower cost. Therefore, the aim of this paper is to analyze CH 3 NH 3 PbI 3 and ZnO materials as an emitter layer for p-type silicon wafer-based heterojunction solar cells. CH 3 NH 3 PbI 3 and ZnO can be synthesized using the cheap Sol-Gel method and can form n-type semiconductor. We propose to combine these two materials since CH 3 NH 3 PbI 3 is a great light absorber and ZnO has an optimal complex refractive index which can be used as antireflection material. The photoelectric parameters of n-CH 3 NH 3 PbI 3 /p-Si, n-ZnO/p-Si, and n-Si/p-Si solar cells have been studied in the range of 20-200 nm of emitter layer thickness. It has been found that the short circuit current for CH 3 NH 3 PbI 3 /p-Si and n-ZnO/p-Si solar cells is almost the same when the emitter layer thickness is in the range of 20-100 nm. Additionally, when the emitter layer thickness is greater than 100 nm, the short circuit current of CH 3 NH 3 PbI 3 /p-Si exceeds that of n-ZnO/p-Si. The optimal emitter layer thickness for n-CH 3 NH 3 PbI 3 /p-Si and n-ZnO/p-Si was found equal to 80 nm. Using this value, the short-circuit current and the fill factor were estimated around 18.27 mA/cm 2 and 0.77 for n-CH 3 NH 3 PbI 3 /p-Si and 18.06 mA/cm 2 and 0.73 for n-ZnO/p-Si. Results show that the efficiency of n-CH 3 NH 3 PbI 3 /p-Si and n-ZnO/p-Si solar cells with an emitter layer thickness of 80 nm are 1.314 and 1.298 times greater than efficiency of traditional n-Si/p-Si for the same sizes. These findings will help perovskites materials to be more appealing in the PV industry and accelerate their development to become a viable alternative in the renewable energy sector.

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Temperature dependent phase transitions and their relation to isosbestic point formation. Case study of C(NH2)3PbI3

Cited by 6 publications

References 33 publications

Synthesis, characterisation and voltammetric study of dimethylammonium lead iodide perovskite

Synthesis, characterisation and voltammetric study of dimethylammonium lead iodide perovskite

Site specifically probing the unfolding process of human telomere i-motif DNA using vibrationally enhanced alkynyl stretch

Analyzing the ZnO and CH3NH3PbI3 as Emitter Layer for Silicon Based Heterojunction Solar Cells

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