Structural and photophysical investigation of single-source evaporation of CsFAPbI<sub>3</sub> and FAPbI<sub>3</sub> perovskite thin films

Klipfel, Nadja; U., Haris, M. P.; Kazim, Samrana; Shibayama, Naoyuki; Kanda, Hiroyuki; Asiri, Abdullah M.; Momblona, Cristina; Ahmad, Shahzada; Nazeeruddin, Mohammad Khaja

doi:10.1039/d2tc01164f

Cited by 10 publications

(6 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ionic radius of Cs + being smaller than that of the FA + cation helps reduce the Goldschmidt tolerance factor of 1.04 to the ideal range and, therefore, induces phase stability at moderately lower temperatures. It could be said that due to the low transition temperature of powders it can be used in single source vacuum evaporation processes [16]. The UV-Vis absorbance spectra of both powder samples were measured, and the results are presented in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Deposition of CsFAPbI₃ thin films by single source flash evaporation

Hernández,

Pacio,

Juárez

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Formamidinium-cesium lead iodide (CsFAPbI3) is a promising perovskite material for photovoltaic applications with a suitable bandgap of 1.45 eV and excellent optoelectronic properties. In this work, CsFAPbI3 perovskite thin films were deposited by single-source flash evaporation on glass substrates using presynthesized crystalline powders as the source material in which the source challenges of simultaneously controlling the evaporation of organic and inorganic sources are avoided. The structural properties of the powders were evaluated by X-ray diffraction, thermal properties by TGA analysis and optical properties by UV-Vis absorption. We find that the formation of mixed phases is inevitable in flash evaporation of thin films. This undesirable phase could reduce the optical bandgap and the thermal stability which can affect the performance of the thin films. To obtain the cubic phase, a post-annealing process should be employed. We carried out structural, morphological, and optical characterizations to determine the phase purity in the films. These preliminary results suggest that flash evaporation deposition parameters can be optimized to understand the formamidinium evaporation and condensation dynamics for improve the properties of CsFAPbI3 perovskite thin films.

show abstract

Section: Resultsmentioning

confidence: 99%

Deposition of CsFAPbI₃ thin films by single source flash evaporation

Hernández,

Pacio,

Juárez

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…The CsFAPbI 3 thin films were deposited from pre-synthesized perovskite through a spin-coating technique [14,15] (detailed in the experimental section). The spin-coated thin films were further annealed at 80 ○ C for 30 min to ensure the perovskite phase.…”

Section: Csfapbi 3 Thin Film From Polycrystal-based Precursormentioning

confidence: 99%

Low Switching Power Neuromorphic Perovskite Devices with Quick Relearning Functionality

Assi

Karthikeyan

et al. 2023

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

In the quest to reduce energy consumption, there is a growing demand for technology beyond silicon as electronic materials for neuromorphic artificial intelligence devices. Equipped with the criteria of energy efficiency and excellent adaptability, organohalide perovskites can emulate the characteristics of synaptic functions in the human brain. In this aspect, this study designs and develops CsFAPbI3‐based memristive neuromorphic devices that can switch at low power and show larger endurance by adopting the powder engineering methodology. The neuromorphic characteristics of the CsFAPbI3‐based devices exhibit an ultra‐high paired‐pulse facilitation index for an applied electric stimuli pulse. Moreover, the transition from short‐term to long‐term memory requires ultra‐low energy with long relaxation times. The learning and training cycles illustrate that the CsFAPbI3‐based devices exhibit faster learning and memorization process owing to their larger carrier lifetime compared to other perovskites. The results provide a pathway to attain low‐power neuromorphic devices that are synchronic to the human brain's performance.

show abstract

“…By optimizing the molar ratio of PbBr 2 to CsBr in the mixture, they achieved a PCE of 8.65% with an open circuit voltage (V oc ) of 1.37 V and bandgap of 2.3 eV with uniform perovskite thickness. Later Nasi et al found that the single-source evaporated CsPbBr 3 layer consisted of a mixture of CsPbBr 3 , CsPb 2 Br 5 and Cs 4 PbBr 6 with a vertical composition gradient [42] . They demonstrated that CsPb 2 Br 5 and Cs 4 PbBr 6 phases can be converted to CsPbBr 3 in low humidity or upon mild thermal treatments, resulting in smooth and pinholefree films with good light absorption properties.…”

Section: Reviewmentioning

confidence: 99%

Applications of vacuum vapor deposition for perovskite solar cells: A progress review

Liu

et al. 2022

iEnergy

View full text Add to dashboard Cite

Metal halide perovskite solar cells (PSCs) have made substantial progress in power conversion efficiency (PCE) and stability in the past decade thanks to the advancements in perovskite deposition methodology, charge transport layer (CTL) optimization, and encapsulation technology. Solution-based methods have been intensively investigated and a 25.7% certified efficiency has been achieved. Vacuum vapor deposition protocols were less studied, but have nevertheless received increasing attention from industry and academia due to the great potential for large-area module fabrication, facile integration with tandem solar cell architectures, and compatibility with industrial manufacturing approaches. In this article, we systematically discuss the applications of several promising vacuum vapor deposition techniques, namely thermal evaporation, chemical vapor deposition (CVD), atomic layer deposition (ALD), magnetron sputtering, pulsed laser deposition (PLD), and electron beam evaporation (e-beam evaporation) in the fabrication of CTLs, perovskite absorbers, encapsulants, and connection layers for monolithic tandem solar cells.

show abstract

Structural and photophysical investigation of single-source evaporation of CsFAPbI₃ and FAPbI₃ perovskite thin films

Abstract: Thermal vacuum deposition is a stimulating technique for upscaling perovskite solar cells. However, the operational complexity of multisource vapor deposition (MSVD) and achieving stoichiometric perovskite layers may impede its implementation....

Cited by 10 publications

References 43 publications

Deposition of CsFAPbI₃ thin films by single source flash evaporation

Deposition of CsFAPbI₃ thin films by single source flash evaporation

Low Switching Power Neuromorphic Perovskite Devices with Quick Relearning Functionality

Applications of vacuum vapor deposition for perovskite solar cells: A progress review

Contact Info

Product

Resources

About

Structural and photophysical investigation of single-source evaporation of CsFAPbI3 and FAPbI3 perovskite thin films

Abstract: Thermal vacuum deposition is a stimulating technique for upscaling perovskite solar cells. However, the operational complexity of multisource vapor deposition (MSVD) and achieving stoichiometric perovskite layers may impede its implementation....

Cited by 10 publications

References 43 publications

Deposition of CsFAPbI3 thin films by single source flash evaporation

Deposition of CsFAPbI3 thin films by single source flash evaporation

Low Switching Power Neuromorphic Perovskite Devices with Quick Relearning Functionality

Applications of vacuum vapor deposition for perovskite solar cells: A progress review

Contact Info

Product

Resources

About

Structural and photophysical investigation of single-source evaporation of CsFAPbI₃ and FAPbI₃ perovskite thin films

Deposition of CsFAPbI₃ thin films by single source flash evaporation

Deposition of CsFAPbI₃ thin films by single source flash evaporation