Spatially-resolved nanoscale measurements of grain boundary enhanced photocurrent in inorganic CsPbBr3 perovskite films

Luchkin, Sergey Yu.; Akbulatov, Azat F.; Frolova, Lyubov A.; Tsarev, Sergey; Troshin, Pavel A.; Stevenson, Keith J.

doi:10.1016/j.solmat.2017.06.059

Cited by 45 publications

(29 citation statements)

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“…Luchkin et al demonstrated that thermal ageing of evaporated CsPbBr 3 films increased the photocurrent and V OC and explained this by downwards band bending at the grain boundaries leading to better electron-hole separation. [139] An average PCE of 3.9 %a nd V OC of 0.94 Vw as obtained. Lei et al through systematic optimization of the deposition parameters with dual-source vacuum evaporation, obtained CsPbBr 3 films with good crystallinity and uniformity at an optimum annealing temperature of 500 8 8C(with the film covered by glass in N 2 to minimize vaporization loss).…”

Section: Vacuum Deposition Methodsmentioning

confidence: 81%

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All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

et al. 2019

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Recently, lead halide‐based perovskites have become one of the hottest topics in photovoltaic research because of their excellent optoelectronic properties. Among them, organic‐inorganic hybrid perovskite solar cells (PSCs) have made very rapid progress with their power conversion efficiency (PCE) now at 23.7 %. However, the intrinsically unstable nature of these materials, particularly to moisture and heat, may be a problem for their long‐term stability. Replacing the fragile organic group with more robust inorganic Cs+ cations forms the cesium lead halide system (CsPbX3, X is halide) as all‐inorganic perovskites which are much more thermally stable and often more stable to other factors. From the first report in 2015 to now, the PCE of CsPbX3‐based PSCs has abruptly increased from 2.9 % to 17.1 % with much enhanced stability. In this Review, we summarize the field up to now, propose solutions in terms of development bottlenecks, and attempt to boost further research in CsPbX3 PSCs.

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Section: Vacuum Deposition Methodsmentioning

confidence: 81%

“…Luchkin et al. demonstrated that thermal ageing of evaporated CsPbBr 3 films increased the photocurrent and V OC and explained this by downwards band bending at the grain boundaries leading to better electron–hole separation . An average PCE of 3.9 % and V OC of 0.94 V was obtained.…”

Section: Solar Cellsmentioning

confidence: 97%

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

et al. 2019

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“…Luchkin et al. zeigten, dass die thermische Alterung von aufgedampften CsPbBr 3 ‐Schichten den Photostrom und V OC erhöht, und erklären diesen Effekt durch eine Bandverbiegung an den Korngrenzen, die zu einer besseren Elektron‐Loch‐Trennung führen sollte . Eine gemittelte PCE von 3.9 % und V OC =0.94 V wurden erzielt.…”

Section: Solarzellenunclassified

“…9.8 %s PCE und V OC = 1.552 V wurden für9%Rb-Substitution bzw.10.1 %sPCE und V OC = 1.594 Vf ür3 %S m-Substitution erzielt. Luchkin et al zeigten, dass die thermische Alterung von aufgedampften CsPbBr 3 -Schichten den Photostrom und V OC erhçht, und erklären diesen Effekt durch eine Bandverbiegung an den Korngrenzen, die zu einer besseren Elektron-Loch-Trennung führen sollte [139]. 15 %).…”

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Anorganische CsPbX₃‐Perowskit‐Solarzellen: Fortschritte und Perspektiven

et al. 2019

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+ + ]D ie Autoren haben zu gleichen Teilen zu dieser Arbeit beigetragen. Die Identifikationsnummern (ORCID) der Autoren sind unter https://doi.org/10.1002/ange.201901081 zu finden.Perowskite auf Halogenidbasis haben sicha ufgrund ihrer hervorragenden optoelektronischen Eigenschaften zu einem der wichtigsten Themen in der Photovoltaik-Forschung entwickelt. Insbesondere wurden bei organisch-anorganischen Perowskit-Solarzellen (PSCs) rasche Fortschritte beim Wirkungsgrad (PCE, power conversion efficiency) erreicht, mit einem derzeitigen Rekordwert von 23.7 %PCE. Die an sichinstabile Beschaffenheit dieser Materialien, insbesondere gegenüber Feuchtigkeit und Wärme,stellt jedoch ein Problem bezüglichihrer Langzeitstabilitätd ar.Der Ersatz der fragilen organischen Gruppe durch robustere anorganische Cs + -Kationen ergibt Caesiumbleihalogenide CsPbX 3 (X = Halogenid), die thermischv iel stabiler und meist auchs tabiler gegen andere Faktoren sind. Seit dem ersten Bericht im Jahr 2015 ist der PCE von CsPbX 3 -basierten PSCs von 2.9 %bis auf heute 17.1 %m it deutlichv erbesserter Stabilitätg estiegen. In diesem Aufsatz sollen die bisherigen Ergebnisse auf dem Gebiet zusammenfasst und Lçsungen fürE ntwicklungsengpässe vorgeschlagen werden.

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“…Luchkin et al fabricated inorganic CsPbBr 3 perovskite solar cells with the best efficiency of 3.9% by using a vacuum deposition process. The poor efficiency was attributed to the off‐stoichiometric ratios of the vacuum‐processed precursors 7. Recently, inorganic perovskite quantum dots (QDs) were developed to fabricate perovskite photoelectronic devices, demonstrating decent device performance 8,9.…”

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confidence: 99%

Solution‐Processed High‐Quality Cesium Lead Bromine Perovskite Photodetectors with High Detectivity for Application in Visible Light Communication

Liu

Zhang

Zhou

et al. 2020

Advanced Optical Materials

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devices in VLC are essential because their response speed, detectivity (D*), and stability determine the quality and speed of the signal acceptance. All-inorganic perovskites are very attractive for their application in the PDs with requirements of high durability, wide-range spectral responses, ultra-high D*, and fast response speed, due to their merits of high thermal stability, tunable bandgaps, high light absorption coefficients, and long carrier diffusion lengths. [2][3][4][5] Particularly, cesium lead bromide (CsPbBr 3 ), a prototypical all-inorganic perovskite with a bandgap energy of 2.4 eV, has been widely used for fabricating solar cells and PDs. [6] The preparation of high-quality CsPbBr 3 films with a large lateral area is crucial for their commercialization. Luchkin et al. fabricated inorganic CsPbBr 3 perovskite solar cells with the best efficiency of 3.9% by using a vacuum deposition process. The poor efficiency was attributed to the off-stoichiometric ratios of the vacuum-processed precursors. [7] Recently, inorganic perovskite quantum dots (QDs) were developed to fabricate perovskite photoelectronic devices, demonstrating decent device performance. [8,9] However, these perovskite films consisted of mosaic QDs capped with a large amount of organic ligands and surface traps, which hinder the carrier transport and limit the device performance. Solutionprocessed CsPbBr 3 polycrystalline (PC) films are an attractive alternative due to better process controllability, endowing them with great potential for large-scale commercial fabrication of perovskite photoelectronic devices. [10][11][12][13] Unfortunately, the fabrication of high-quality CsPbBr 3 PC films via solution processes is challenging. The low solubility of CsBr in dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) solvents causes insufficient and unbalanced reaction of the precursors, which leads to discontinuous and porous morphology and off-stoichiometric compositions in solution-processed perovskite films. [14,15] Additionally, due to the much lower solubility of CsBr than that of PbBr 2 in the solvents, CsBr behaves as the growth seeds during the nucleation of perovskite crystallites, which aggravates the formation of voids and impurity phases, hindering the achievement of the high-performance PDs. [16] Cesium lead bromide (CsPbBr 3 ) perovskite photodetectors (PDs) are attractive for applications in visible light communication (VLC) due to ultra-high detectivity and fast response speed. However, the fabrication of high-quality CsPbBr 3 polycrystalline films using solution-based process is very challenging. Due to the low solubility of CsBr in precursor solutions, solution-processed CsPbBr 3 films are typically discontinuous and porous, hindering the performance of resulting PDs. Herein, a facile and modified sequential spin-coating method is introduced to prepare high-crystallinity, pinhole-free CsPb 2 Br 5 -CsPbBr 3 perovskite films with an average grain size of ≈1 µm. The hole-transport-layer-free (HTL-free) PDs based on the CsPb ...

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Spatially-resolved nanoscale measurements of grain boundary enhanced photocurrent in inorganic CsPbBr3 perovskite films

Cited by 45 publications

References 54 publications

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

Anorganische CsPbX₃‐Perowskit‐Solarzellen: Fortschritte und Perspektiven

Solution‐Processed High‐Quality Cesium Lead Bromine Perovskite Photodetectors with High Detectivity for Application in Visible Light Communication

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Spatially-resolved nanoscale measurements of grain boundary enhanced photocurrent in inorganic CsPbBr3 perovskite films

Cited by 45 publications

References 54 publications

All‐Inorganic CsPbX3 Perovskite Solar Cells: Progress and Prospects

All‐Inorganic CsPbX3 Perovskite Solar Cells: Progress and Prospects

Anorganische CsPbX3‐Perowskit‐Solarzellen: Fortschritte und Perspektiven

Solution‐Processed High‐Quality Cesium Lead Bromine Perovskite Photodetectors with High Detectivity for Application in Visible Light Communication

Contact Info

Product

Resources

About

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

Anorganische CsPbX₃‐Perowskit‐Solarzellen: Fortschritte und Perspektiven