Understanding the effect of chlorobenzene and isopropanol anti-solvent treatments on the recombination and interfacial charge accumulation in efficient planar perovskite solar cells

Prochowicz, Daniel; Tavakoli, Mohammad Mahdi; Solanki, Ankur; Goh, Teck Wee; Pandey, Kavita; Sum, Tze Chien; Saliba, Michael; Yadav, Pankaj

doi:10.1039/c8ta03782e

Cited by 100 publications

(94 citation statements)

References 48 publications

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“…[79] Acommon variation is to introduce av ariety of anti-solvents,s uch as chlorobenzene (CB), benzene,xylene,toluene,isopropylalcohol (IPA), ethyl acetate (EA), and chloroform during the spin-coating. [80] These anti-solvents increase the rate of HaP or HaP precursor nucleation resulting in improved morphology/coverage of the substrate.T he resulting films are then annealed (for hybrid HaPs,a tt emperatures usually not far from 100 8 8C, but for HaPs without organic Acations,a sf or CsPbX 3 ,h igher temperatures are often beneficial). Simple one-step fabrication methods seem to be difficult to control, particularly in terms of reproducibility.F or Cs-based HaP films,o ne of the major constraints for the one-step method is the solubility limit of Cs salts and in particular CsBr (ca.…”

Section: All Solution Methodsmentioning

confidence: 99%

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: All Solution Methodsmentioning

confidence: 99%

All‐Inorganic CsPbX₃ Perovskite Solar Cells: Progress and Prospects

et al. 2019

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“…Im einstufigen Verfahren werden die Vorstufen von CsPbX 3 im jeweiligen Lçsungsmittel in einem fixen (oft stçchiometrischen) Verhältnis gelçst und anschließend durch Spin-Coating abgeschieden. [80] Diese Antisolventien erhçhen die Keimbildungsrate der HaPs oder HaP-Vorstufen, was zu einer verbesserten Morphologie/Bedeckung des Substrats führt. [79] Eine gängige Va riante ist der Zusatz von Antisolventien wie Chlorbenzol (CB), Benzol, Xylol, Toluol, Isopropylalkohol (IPA), Ethylacetat (EA) und Chloroform während der Spin-Beschichtung.…”

Section: Reine Lçsungsverfahrenunclassified

“…[79] Eine gängige Va riante ist der Zusatz von Antisolventien wie Chlorbenzol (CB), Benzol, Xylol, Toluol, Isopropylalkohol (IPA), Ethylacetat (EA) und Chloroform während der Spin-Beschichtung. [80] Diese Antisolventien erhçhen die Keimbildungsrate der HaPs oder HaP-Vorstufen, was zu einer verbesserten Morphologie/Bedeckung des Substrats führt. Die resultierenden Schichten werden dann getempert;b ei hybriden HaPs sind Te mperaturen um 100 8 8C üblich, bei HaPs ohne organische A-Kationen, wie CsPbX 3 , sind hçhere Te mperaturen oft von Vorteil.…”

Section: Reine Lçsungsverfahrenunclassified

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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“…This stunning PCE is mainly due to novel device architecture, interface and compositional engineering, and surface passivation of the perovskite films . Apart from the PCE point of view, the stability is the main challenge in the PSCs, which is a key step for commercialization of these devices . One of the main reasons for the instability of PSCs is the hole transporting layer (HTL) materials, which can be addressed properly by using new alternative HTLs .…”

Section: Introductionmentioning

confidence: 99%

Efficient and Stable Mesoscopic Perovskite Solar Cells Using PDTITT as a New Hole Transporting Layer

Tavakoli

Zhao

Pò

et al. 2019

Adv Funct Materials

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Stability is the main challenge in the field of organic-inorganic perovskite solar cells (PSCs). Finding low-cost and stable hole transporting layer (HTL)is an effective strategy to address this issue. Here, a new donor polymer, poly(5,5-didecyl-5H-1,8-dithia-as-indacenone-alt-thieno[3,2-b]thiophene) (PDTITT), is synthesized and employed as an HTL in PSCs, which has a suitable band alignment with respect to the double-A cation perovskite film. Using PDTITT, the hole extraction in PSCs is greatly improved as compared to commonly used HTLs such as 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl) amino]-9,9′-spirobifluorene (spiro-OMeTAD), addressing the hysteresis issue. After careful optimization, an efficient PSC is achieved based on mesoscopic TiO 2 electron transporting layer with a maximum power conversion efficiency (PCE) of 18.42% based on PDTITT HTL, which is comparable with spiro-OMeTAD-based PSC (19.21%). Since spiro-based PSCs suffer from stability issue, the operational stability in the PSC with PDTITT HTL is studied. It is found that the device with PDTITT retains 88% of its initial PCE value after 200 h under illumination, which is better than the spiro-based PSC (54%).the stability is the main challenge in the PSCs, which is a key step for commercialization of these devices. [19][20][21] One of the main reasons for the instability of PSCs is the hole transporting layer (HTL) materials, which can be addressed properly by using new alternative HTLs. [22][23][24] One of the most commonly used HTLs in the PSCs is 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD), which is a great choice for the fabrication of highly efficient PSC over 23%. [5,25] However, the PSCs based on Spiro-OMeTAD suffer from poor stability due to the presence of unstable dopants as well as many voids through the HTL. In order to address this issue, compositional engineering by adding new additives into the molecular structure of spiro or interface engineering by adding an extra layer on top of the spiro could be potential solutions. [25][26][27][28][29] For example, Sunehira et al. [30] applied a thin layer of MoO 3 between spiro and electrode, resulting in an efficient PSC with better stability.These strategies improved the stability of the PSCs slightly and could not be an ideal solution for this issue. Consequently, replacement of spiro-OMeTAD using new stable HTLs is a better choice to improve the stability of the PSCs. There are many organic and inorganic HTLs for replacing spiro, however, they are expensive such as poly(triaryl amine) PTAA, require high-temperature annealing such NiO, or show limited efficiency and stability. [31][32][33][34][35] In this work, we synthesize a new and low-cost donor polymer, poly(5,5-didecyl-5H-1,8-dithia-as-indacenone-altthieno[3,2-b]thiophene) (PDTITT), and employ it as a potential HTL for the fabrication of efficient and stable PSCs. Our proposed polymer is cheaper than commonly used HTL polymers such as spiro and PTAA, thanks to its lower synthesis complexity, ...

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Understanding the effect of chlorobenzene and isopropanol anti-solvent treatments on the recombination and interfacial charge accumulation in efficient planar perovskite solar cells

Abstract: The role of anti-solvent treatment on the morphological and optoelectronic properties of multiple-cation and mixed-halide perovskite solar cells have been studied.

Cited by 100 publications

References 48 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

Efficient and Stable Mesoscopic Perovskite Solar Cells Using PDTITT as a New Hole Transporting Layer

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Understanding the effect of chlorobenzene and isopropanol anti-solvent treatments on the recombination and interfacial charge accumulation in efficient planar perovskite solar cells

Abstract: The role of anti-solvent treatment on the morphological and optoelectronic properties of multiple-cation and mixed-halide perovskite solar cells have been studied.

Cited by 100 publications

References 48 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

Efficient and Stable Mesoscopic Perovskite Solar Cells Using PDTITT as a New Hole Transporting Layer

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Product

Resources

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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