Efficient composition tuning via cation exchange and improved reproducibility of photovoltaic performance in FA MA1-PbI3 planar heterojunction solar cells fabricated by a two-step dynamic spin-coating process

Jung, Kyong Yeun; Lee, Jae-Ho; Oh, Kwonwoo; Im, Chang-Hwan; Do, Junghwan; Kim, Joosun; Chae, Weon‐Sik; Lee, Man−Jong

doi:10.1016/j.nanoen.2018.10.023

Cited by 34 publications

(35 citation statements)

References 66 publications

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“…that the diffraction peaks at 14.2°, 19.9°, 24.4°, 28.4°, 31.8°, 34.9°, 40.6°, 43.2°, 50.3°, 52.5°, 54.6°and 60.7°are assigned to the cubic α perovskite crystal phase with high crystallinity. Meanwhile, a diffraction pattern of PbI 2 at 12.7°is observed[24,[26][27][28][29]. These results demonstrate the formation of PbI 2 which is similar to the results reported by others[27,30].…”

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confidence: 90%

Conductive metallic filaments dominate in hybrid perovskite-based memory devices

et al. 2019

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Organic−inorganic hybrid perovskites (OHPs) are well-known as light-absorbing materials in solar cells and have recently attracted considerable attention for the applications in resistive switching memory. Previous studies have shown that ions can migrate to form a conductive channel in perovskites under an external voltage. However, the exact resistance mechanism for Ag or halogens which dominate the resistive behavior is still controversial. Here, we demonstrate a resistive switching memory device based on Ag/FA 0.83 MA 0.17 Pb(I 0.82 Br 0.18) 3 /fluorine doped tin oxide (FTO). The migration of Ag cations and halide anions is demonstrated by energy dispersive X-ray spectroscopy (EDS) after the SET process (positive voltage on Ag). By comparing the I-V behavior of the Au-based devices, it is clear that the conductive channel formed by Ag is the main factor of the switching characteristics for Ag-based devices. Meanwhile, by controlling the appropriate SET voltage, two kinds of resistance characteristics of the analog switch and threshold switch can be realized in the Ag-based device. As a result, it may be possible to implement both data storage and neuromorphic computing in a single device.

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confidence: 90%

Conductive metallic filaments dominate in hybrid perovskite-based memory devices

et al. 2019

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“…103 As for A-site CERs, most reported studies focused on organic-inorganic hybrid perovskites such as MAPbX 3 with FA + or PEA + . [104][105][106][107] For fully inorganic perovskite NCs, Soon and colleagues reported the potential influence of a CER between lead-free CsSnI 3 and Rb + . On the basis of first-principle density functional theory calculations, the chemical structure and physical properties of Rb x Cs 1Àx SnI 3 were investigated.…”

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confidence: 99%

Cation/Anion Exchange Reactions toward the Syntheses of Upgraded Nanostructures: Principles and Applications

et al. 2020

Matter

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The last 5 years have witnessed rapid progress in the field of hybrid nanostructures toward enhanced optical and electronic properties. On this topic, we focus on the relevant progress that has been achieved on the basis of cation/anion exchange reactions (CERs/AERs). Different from those direct synthesis strategies, CERs/AERs can offer more freedom in tuning the chemical composition, crystal phases, doping, interfaces, and morphologies, which are key parameters to determine the optical and electronic properties of the target products. We present several examples, e.g., doped quantum dots (QDs), engineered core-shell QDs, metal-semiconductor hybrid nanostructures, hollow structures, and inorganic perovskite nanocrystals. These upgraded structures afforded by CERs/ AERs generally exhibit improved properties, such as increased quantum yields, prolonged lifetimes, and well-engineered band gaps for charge transportation and recombination, thus providing more opportunities for further advanced applications.

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“…S1A). The energy level alignment of the materials in this structure (17)(18)(19)(20) is presented in Fig. 1D.…”

Section: Resultsmentioning

confidence: 99%

Green energy by recoverable triple-oxide mesostructured perovskite photovoltaics

Schneider

Efrati

Alon

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Perovskite solar cells have developed into a promising branch of renewable energy. A combination of feasible manufacturing and renewable modules can offer an attractive advancement to this field. Herein, a screen-printed three-layered all-nanoparticle network was developed as a rigid framework for a perovskite active layer. This matrix enables perovskite to percolate and form a complementary photoactive network. Two porous conductive oxide layers, separated by a porous insulator, serve as a chemically stable substrate for the cells. Cells prepared using this scaffold structure demonstrated a power conversion efficiency of 11.08% with a high open-circuit voltage of 0.988 V. Being fully oxidized, the scaffold demonstrated a striking thermal and chemical stability, allowing for the removal of the perovskite while keeping the substrate intact. The application of a new perovskite in lieu of a degraded one exhibited a full regeneration of all photovoltaic performances. Exclusive recycling of the photoactive materials from solar cells paves a path for more sustainable green energy production in the future.

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Efficient composition tuning via cation exchange and improved reproducibility of photovoltaic performance in FA MA1-PbI3 planar heterojunction solar cells fabricated by a two-step dynamic spin-coating process

Cited by 34 publications

References 66 publications

Conductive metallic filaments dominate in hybrid perovskite-based memory devices

Conductive metallic filaments dominate in hybrid perovskite-based memory devices

Cation/Anion Exchange Reactions toward the Syntheses of Upgraded Nanostructures: Principles and Applications

Green energy by recoverable triple-oxide mesostructured perovskite photovoltaics

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