Enhancing stability for organic-inorganic perovskite solar cells by atomic layer deposited Al2O3 encapsulation

Choi, Eun Young; Kim, Jin-Cheol; Lim, Sean; Han, Ekyu; Ho‐Baillie, Anita; Park, Nochang

doi:10.1016/j.solmat.2018.08.016

Cited by 75 publications

(60 citation statements)

References 46 publications

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“…They realized that holes need to be transported through tunneling, so the Al 2 O 3 passivation layer must be very thin, as thin as about 1 nm. In addition, Al 2 O 3 can also act as an encapsulant . Bai et al designed a new method to wrap the perovskite grains with oligomeric silica (OS) to form a core–shell structure, which not only passivated the surface and grain boundaries, but also fine‐tuned the grain size ( Figure 9 a) .…”

Section: Passivation Of Perovskite Layermentioning

confidence: 99%

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Gao

Zhao

Zhang

et al. 2019

Advanced Energy Materials

597

483

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The disorderly distribution of defects in the perovskite or at the grain boundaries, surfaces, and interfaces, which seriously affect carrier transport through the formation of nonradiative recombination centers, hinders the further improvement on the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Several defect passivation strategies have been confirmed as an efficient approach for promoting the performance of PSCs. Herein, recent progress in the defect passivation toward efficient perovskite solar cells are summarized, and a classification of common passivation strategies that elaborate the mechanism according to the location of the defects and the type of passivation agent is presented. Finally, this review offers likely prospects for future trends in the development of passivation strategies.

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Section: Passivation Of Perovskite Layermentioning

confidence: 99%

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Gao

Zhao

Zhang

et al. 2019

Advanced Energy Materials

597

483

View full text Add to dashboard Cite

show abstract

“…Instabilities include i) material degradation when exposed to heat, UV light and moisture, and ii) operational hysteresis under different bias scan direction and rates . Solar cell degradation by heat stress could be categorized as an intrinsic that can be alleviated by improving the perovskite material itself and the transport layers such as spiro‐MeOTAD that degrade at high temperatures . UV instability is mainly related to TiO 2 as discussed in the previous section.…”

Section: Passivation Approaches In the Fabrication Of Perovskite Layermentioning

confidence: 99%

Review of Novel Passivation Techniques for Efficient and Stable Perovskite Solar Cells

2019

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Perovskite solar cells contain various defects within the perovskite absorber and the corresponding interfaces, affecting device performance and stability. Fortunately, there have been tremendous efforts in advancing passivation techniques contributing to high‐efficiency perovskite solar cell with improved stability. Here, the state‐of‐the‐art passivation approaches for each layer of the perovskite cell with the aim of improving carrier extraction, reducing carrier recombination, and/or improving cell stability are reviewed. Passivation of the electron transport layer can improve the stability of perovskite solar cells by reducing trap states or by physically separating the transport layer from contacting perovskite. Controlling the amount of PbI2 in the perovskite precursor has been found to be effective in passivating defect states at the grain boundaries and on the surface. Additives such as elemental iodine, organic surfactants, and Group 1 metal compounds incorporated in perovskite precursors have been reported to passivate recombination trap centers. These approaches have also contributed to improved energy band alignment between carrier transport layers and perovskite absorber improving device performance. An effective strategy to improve moisture stability is the use of 2D perovskites or hydrophobic large cation molecules forming 2D or quasi‐2D phases at grain boundaries or film surfaces providing passivation and preventing moisture ingress.

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“…In order to minimize moisture-induced degradation of perovskite-based solar cells, a variety of approaches have been taken, such as compositional tailoring, 12,13 interfacial engineering, 14,15 encapsulation 16,17 and so on. One attractive approach is the use of mesoscopic engineering.…”

Section: Introductionmentioning

confidence: 99%

A bilayer TiO₂/Al₂O₃ as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells

Wang

Chen

et al. 2020

Mater. Adv.

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Enhancing stability for organic-inorganic perovskite solar cells by atomic layer deposited Al2O3 encapsulation

Cited by 75 publications

References 46 publications

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Review of Novel Passivation Techniques for Efficient and Stable Perovskite Solar Cells

A bilayer TiO₂/Al₂O₃ as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells

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Enhancing stability for organic-inorganic perovskite solar cells by atomic layer deposited Al2O3 encapsulation

Cited by 75 publications

References 46 publications

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Review of Novel Passivation Techniques for Efficient and Stable Perovskite Solar Cells

A bilayer TiO2/Al2O3 as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells

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A bilayer TiO₂/Al₂O₃ as the mesoporous scaffold for enhanced air stability of ambient-processed perovskite solar cells