Large grained and high charge carrier lifetime CH3NH3PbI3 thin-films: implications for perovskite solar cells

Chouhan, Arun Singh; Jasti, Naga Prathibha; Hadke, Shreyash; Raghavan, Srinivasan; Avasthi, Sushobhan

doi:10.1016/j.cap.2017.07.005

Cited by 32 publications

(22 citation statements)

References 35 publications

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“…1 (b) shows the evolution of carrier lifetime values over a period of 9 hours of ambient ageing. In the first one hour, films with 0% Cs showed an increase in the carrier lifetime value from 21 μs to 30 μs [4]. This has been observed before, and typically is attributed to the healing behavior of the moisture present in the ambient environment, which facilitates better carrier transport across grains and reduced recombination [7].…”

Section: Resultssupporting

confidence: 62%

“…Solvent-solvent extraction and post treatments are widely used to improve the morphology of the perovskite films. It has been previously shown that exposure to methylamine vapors (MVE) improves the MAPbI3 film quality by means of complex formation and perovskite recrystallization [4]. However, there are no reports of MVE treatment applied to mixed-cation perovskite films.…”

Section: Resultsmentioning

confidence: 99%

“…Spin-coated films were further annealed for 20 minutes at 100°C. For MVE treatment, thin-films were exposed to methylamine vapour for ~1 second at room temperature and allowed to recrystallize at roomtemperature [4].…”

Section: Methodsmentioning

confidence: 99%

“…Minority carrier recombination lifetime values were measured for perovskite thin films by Freiberg Instrument MDP-spotusing a 405 nm laser(180 mW) [4,5]. Perovskite thin films were characterized using Rigaku Smart lab X-ray Diffractometer Cu-K-alpha radiation.…”

Section: Methodsmentioning

confidence: 99%

“…In this work, the effect of Cs incorporation on stability and performance of mixed cation perovskite films (CsxMA1-xPbI3-xBrx) is studied by measuring the minority carrier recombination lifetime, at varying level of Cs incorporation (x in %). Furthermore, Methylamine Vapor Exposure (MVE) has been shown to improve the morphology of MAPbI3 films, leading towards increase in efficiency and stability of devices [4]. However, the suitability of MVE technique on mixed cation perovskite films and its effect on their stability has not been studied before in detail.…”

Section: Introductionmentioning

confidence: 99%

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Methylamine Vapor Exposure for Improved Morphology and Stability of Cesium-Methylammonium Lead Halide Perovskite Thin-Films

Singh

Chouhan

Avasthi

2019

Springer Proceedings in Physics

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Mixed-cation Cesium-Methylammonium lead halide perovskite (CsxMA1-xPbI3-xBrx) thin-films have been used to demonstrate stable and efficient perovskite devices. However, a systematic study of the Cs incorporation on the properties of the perovskite films has not been reported. In this report, Impact of Cesium incorporation on the minority carrier recombination lifetime of Cesium-Methylammonium lead halide perovskite thin-films is studied. The lifetime for the as-deposited perovskite films decreases with increasing concentration of cesium. However, mixed cation perovskite film is more stable, showing higher lifetime (15-20 µs) after 9 hours of ambient exposure than just after deposition (6-13 µs). 'Methylamine Vapor Exposure' (MVE) technique was used to improve the morphology of the asdeposited film. MVE treated films are more oriented along (110) direction and were even more stable in ambient, with Cs0.10MA0.90PbI2.90Br0.10 films showing lifetime of almost 50 μs after 9 hours of ambient exposure, twice the lifetime of a comparable MAPbI3 film. These results throw light on why mixed-cation cesium-methylamine lead halide perovskite films are better for highly efficient and stable perovskite solar cells.

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Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methylamine Vapor Exposure for Improved Morphology and Stability of Cesium-Methylammonium Lead Halide Perovskite Thin-Films

Singh

Chouhan

Avasthi

2019

Springer Proceedings in Physics

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Research Background and Recent Progress of Perovskite Photovoltaics

Miyasaka¹,

Jena²

2021

Perovskite Photovoltaics and Optoelectronics

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Effect of Grain Cluster Size on Back‐Contact Perovskite Solar Cells

Lin

Chesman

Raga

et al. 2018

Adv Funct Materials

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Incorporating interdigitated back-contact electrodes into organic-inorganic halide perovskite solar cells overcomes the optical losses and low architectural defect tolerance present in conventional "sandwich" cell configurations. However, other factors limit device performance in back-contact architectures, such as the short charge-carrier diffusion length within the perovskite film relative to the electrode spacing. As charge-carrier diffusion length is crystal-size related, in order to understand the effect of perovskite morphology on the performance of back-contact perovskite solar cells (bc-PSCs), perovskite films with four different grain cluster sizes, i.e. large, medium, small and extra small, were fabricated via a solvent annealing approach. Crystallization of the perovskite is found to be closely related to the surface chemistry and topography of the substrate. The bc-PSC photovoltaic performance correlates positively with the perovskite grain cluster size. Through a detailed analysis of transient photovoltage decay measurements, time-resolved photoluminescence, and space charge-limited current measurements, the effect of defect densities associated with grain cluster boundaries was elucidated.

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Large grained and high charge carrier lifetime CH3NH3PbI3 thin-films: implications for perovskite solar cells

Cited by 32 publications

References 35 publications

Methylamine Vapor Exposure for Improved Morphology and Stability of Cesium-Methylammonium Lead Halide Perovskite Thin-Films

Methylamine Vapor Exposure for Improved Morphology and Stability of Cesium-Methylammonium Lead Halide Perovskite Thin-Films

Research Background and Recent Progress of Perovskite Photovoltaics

Effect of Grain Cluster Size on Back‐Contact Perovskite Solar Cells

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