Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing

Kong, Jaemin; Wang, Hanyu; Röhr, Jason A.; Fishman, Zachary S.; Zhou, Yuanyuan; Li, Mingxing; Cotlet, Mircea; Kim, Geunjin; Karpovich, Christopher; Antônio, Francisco; Padture, Nitin P.; Taylor, André D.

doi:10.1021/acsaem.0c00854

Cited by 23 publications

(24 citation statements)

References 47 publications

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“…[51] An ideality factor closer to unity, therefore, infers that the solar cells operate with less trap-assisted recombination. [52] In the PSCs with H-SnO 2 , we obtained η id of 1.29 that is lower than the value (η id ¼ 1.67) obtained from RT-SnO 2 -based PSCs. This supports the enhanced J SC and is evidence of improvements in V OC and FF as the traps can affect quasi-Fermi level splitting and charge extraction.…”

Section: Perovskite Solar Cell Performancecontrasting

confidence: 63%

A Compact Electron Transport Layer Using a Heated Tin‐Oxide Colloidal Solution for Efficient Perovskite Solar Cells

et al. 2022

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Tin dioxide is a frequently reported electron transporting material for perovskite solar cells (PSCs) that yields high‐performance devices and can be solution processed from aqueous colloidal solutions. While being very simple to process, electron transport layers deposited in this manner often lead to nonuniform film morphology, significantly affecting the morphology of the subsequent perovskite layer, lowering the overall device performance. Herein, it is shown that heating the SnO2 colloidal solution (70 °C) results in compact SnO2 films with increased surface coverage and fewer gaps in the SnO2 film. Such films possess threefold higher lateral electrical conductivity than those obtained from room‐temperature solutions. The narrow gaps in the SnO2 film also reduce the chances of direct contact between the indium tin oxide electrode and the perovskite layer, yielding better contact with less voltage loss. The improved SnO2 surface coverage induces larger perovskite grains (≈565 nm) than those prepared from the room‐temperature solution (≈273 nm). Finally, using these compact SnO2 layers, efficient and stable PSCs that retain ≈85% of the initial power conversion efficiency of 20.67% after 100 h of maximum power point tracking are demonstrated.

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Section: Perovskite Solar Cell Performancecontrasting

confidence: 63%

A Compact Electron Transport Layer Using a Heated Tin‐Oxide Colloidal Solution for Efficient Perovskite Solar Cells

et al. 2022

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“…For example, the chemical reagents have been combined with traditional thermal treatments to improve the crystalline quality of the film by dissolving-recrystallizing the perovskite film, or reducing the evaporation of organic solvents [126,127]. On the other hand, researchers have used the principle of extracting polar solvents with organic reagents to achieve the supersaturated crystallization of perovskite, or have added ions into the precursor liquid to complete the coating and crystallization of the film at the same time [128,129].…”

Section: Chemical Annealingmentioning

confidence: 99%

“…The encapsulation layer annealing was performed by adding a layer on the surface of perovskite to form a sandwich structure with the upper and lower layers [129,169]. The existence of the encapsulated layer in the annealing process improved the film growth by retarding the evaporation of the solvent.…”

Section: Encapsulation Layer Annealingmentioning

confidence: 99%

Annealing Engineering in the Growth of Perovskite Grains

Wang

Liu

et al. 2022

Crystals

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Perovskite solar cells (PSCs) are a promising and fast-growing type of photovoltaic cell due to their low cost and high conversion efficiency. The high efficiency of PSCs is closely related to the quality of the photosensitive layer, and the high-quality light absorbing layer depends on the growth condition of the crystals. In the formation of high-quality crystals, annealing is an indispensable and crucial part, which serves to evaporate the solvent and drive the crystallization of the film. Various annealing methods have different effects on the promotion of the film growth process owing to the way they work. Here, this review will present a discussion of the growth puzzles and quality of perovskite crystals under different driving forces, and then explain the relationship between the annealing driving force and crystal growth. We divided the main current annealing methods into physical and chemical annealing, which has never been summarized before. The main annealing methods currently reported for crystal growth are summarized to visualize the impact of annealing design strategies on photovoltaic performance, while the growth mechanisms of thin films under multiple annealing methods are also discussed. Finally, we suggest future perspectives and trends in the industrial fabrication of PSCs in the future. The review promises industrial manufacturing of annealed PSCs. The review is expected to facilitate the industrial fabrication of PSCs.

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“…The highest FF values of regular perovskite solar cells and inverted perovskite solar cells are 85% [ 107 ] and 86% [ 108 ], respectively. The high FF values can be mainly explained as due to the existence of organic dipoles in the organometal trihalide perovskites, which has been demonstrated theoretically and experimentally [ 109 , 110 ].…”

Section: Working Mechanisms Of Perovskite Solar Cellsmentioning

confidence: 99%

Understanding the PEDOT:PSS, PTAA and P3CT-X Hole-Transport-Layer-Based Inverted Perovskite Solar Cells

Lin

et al. 2022

Polymers

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The power conversion efficiencies (PCEs) of metal-oxide-based regular perovskite solar cells have been higher than 25% for more than 2 years. Up to now, the PCEs of polymer-based inverted perovskite solar cells are widely lower than 23%. PEDOT:PSS thin films, modified PTAA thin films and P3CT thin films are widely used as the hole transport layer or hole modification layer of the highlyefficient inverted perovskite solar cells. Compared with regular perovskite solar cells, polymer-based inverted perovskite solar cells can be fabricated under relatively low temperatures. However, the intrinsic characteristics of carrier transportation in the two types of solar cells are different, which limits the photovoltaic performance of inverted perovskite solar cells. Thanks to the low activation energies for the formation of high-quality perovskite crystalline thin films, it is possible to manipulate the optoelectronic properties by controlling the crystal orientation with the different polymer-modified ITO/glass substrates. To achieve the higher PCE, the effects of polymer-modified ITO/glass substrates on the optoelectronic properties and the formation of perovskite crystalline thin films have to be completely understood simultaneously.

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Perovskite Solar Cells with Enhanced Fill Factors Using Polymer-Capped Solvent Annealing

Cited by 23 publications

References 47 publications

A Compact Electron Transport Layer Using a Heated Tin‐Oxide Colloidal Solution for Efficient Perovskite Solar Cells

A Compact Electron Transport Layer Using a Heated Tin‐Oxide Colloidal Solution for Efficient Perovskite Solar Cells

Annealing Engineering in the Growth of Perovskite Grains

Understanding the PEDOT:PSS, PTAA and P3CT-X Hole-Transport-Layer-Based Inverted Perovskite Solar Cells

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