Two-step sequential blade-coating of high quality perovskite layers for efficient solar cells and modules

Zhang, Junwen; Bu, Tongle; Li, Jing; Li, Hengyi; Mo, Yanping; Wu, Zheng; Liu, Yifan; Zhang, Xiaoli; Cheng, Yi‐Bing; Huang, Fuzhi

doi:10.1039/d0ta02043e

Cited by 73 publications

(76 citation statements)

References 43 publications

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“…[ 73 ] Recent studies have also described meniscus blade coating of perovskite films by incorporating thiourea into precursor solution to facilitate the coating of a compact perovskite layer on a rough surface in a glovebox, [ 74 ] incorporating organic halide molecules in FA‐alloyed PSCs to enhance phase purity and stability, [ 75 ] and two‐step sequential blade coating of flexible PSCs with a record fill factor ( FF ) of 81% under ambient conditions with 20% relative humidity. [ 76 ] Air‐knife‐assisted, room‐temperature blade‐coated PSCs have been reported by our group ( PCE of 20.26%, using an inert gas glovebox), [ 12 ] and Huang et al. ( PCE up to 21.3%, using delicate solvent engineering in ambient air with an unspecified relative humidity), [ 62 ] indicating high potential for large‐scale applications.…”

Section: Introductionmentioning

confidence: 91%

Printing High‐Efficiency Perovskite Solar Cells in High‐Humidity Ambient Environment—An In Situ Guided Investigation

Fong

Ren

et al. 2021

Advanced Science

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Extensive studies are conducted on perovskite solar cells (PSCs) with significant performance advances (mainly spin coating techniques), which have encouraged recent efforts on scalable coating techniques for the manufacture of PSCs. However, devices fabricated by blade coating techniques are inferior to state‐of‐the‐art spin‐coated devices because the power conversion efficiency (PCE) is highly dependent on the morphology and crystallization kinetics in the controlled environment and the delicate solvent system engineering. In this study, based on the widely studied perovskite solution system dimethylformamide–dimethyl sulfoxide, air‐knife‐assisted ambient fabrication of PSCs at a high relative humidity of 55 ± 5% is reported. In‐depth time‐resolved UV–vis spectrometry is carried out to investigate the impact of solvent removal and crystallization rate, which are critical factors influencing the crystallization kinetics and morphology because of adventitious moisture. UV–vis spectrometry enables accurate determination of the thickness of the wet precursor film. Anti‐solvent‐free, high‐humidity ambient coatings of hysteresis‐free PSCs with PCEs of 21.1% and 18.0% are demonstrated for 0.06 and 1 cm2 devices, respectively. These PSCs exhibit comparable stability to those fabricated in a glovebox, thus demonstrating their high potential.

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Section: Introductionmentioning

confidence: 91%

Printing High‐Efficiency Perovskite Solar Cells in High‐Humidity Ambient Environment—An In Situ Guided Investigation

Fong

Ren

et al. 2021

Advanced Science

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“…A blade coating method is widely adopted for scalable PSMs due to its facile processability, [ 14–27 ] which is indeed regarded as an efficient method in terms of saving the precursor solution. [ 14,15 ] A relatively small amount (~20%) of perovskite precursor solution is required for the blade coating compared with the conventional spin‐coating method.…”

Section: High Volume Manufacturing Technologymentioning

confidence: 99%

“…[ 4–7 ] The noticeable growth of PSCs, coupled with their low process cost, urged to study the feasibility of PSCs for a scalable module from the industrial point of view. Accordingly, various scalable technologies have been introduced and adapted to produce a uniform and homogeneous perovskite film, [ 12–32,35–55 ] which enables a unit cell to be scaled up toward a scalable subcell to compose a module. Unlike PSCs, the perovskite solar modules (PSMs) are still behind the mature technology, mainly due to a difficulty of using the established technology customized for a unit cell.…”

Section: Introductionmentioning

confidence: 99%

Progress of Perovskite Solar Modules

Kim

Park

2021

Adv Energy and Sustain Res

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Perovskite solar cells (PSCs) reached 25.5% of certified power conversion efficiency (PCE) in 2020. A remarkable PCE of PSCs has urged scalable technologies to grow for manufacturing modules. Therefore, scalable technology is rapidly developing though the performance of perovskite solar modules (PSMs) is still far behind that of PSCs. Herein, the recent progress in scalable technologies is reviewed with addressing important parameters in each process. In addition, the performance measurement protocols for PSMs are specifically discussed based on International Electrotechnical Commission to be prepared from the industrial point of view. Finally, the environmental hazard impact by accidental lead leakage and the introduction of green solvent to replace of current toxic solvent are described.

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“…Recently, Zhang showed the efficiency of 13.32% on 53.6 cm 2 active area using a sequential two-step blade coating of Perovksite layer as shown in fig. 15(b) [102]. [104], accompanied with the gas-quenching process to evaporate the solvent quickly, mimicking the "quenching" step in spin-coating method, as shown in fig.…”

mentioning

confidence: 99%

“…-(a) Blade coating system[103]. (b) Schematic illustration of the sequential two-step blade coating of perovskite films: (i) blade-coating of PbI2 films assisted with gas blowing, (ii) Thermal annealing of PbI2 films, (iii) blade-coating of FAI/MABr/MACl, and (iv) thermal annealing of the perovskite film[102].…”

mentioning

confidence: 99%

Photovoltaics

2020

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The conversion of solar energy into electricity via the photovoltaic (PV) effect has been rapidly developing in the last decades due to its potential for transition from fossil fuels to renewable energy based economies. In particular, the advances in PV technology and on the economy of scale permitted to reduce the cost of the energy produced with solar cells down to the energy cost of conventional fossil fuel. Thus, PV will play an important role to address the biggest challenges of our planet including global warming, climate change and air pollution. In this paper, we will introduce the photovoltaic technology recalling the working principle of the photovoltaic conversion and describing the different PV available on the market and under development. In the last section, we will focus more on the emerging technology of the halide perovskite, which is the research subject of the authors.

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Two-step sequential blade-coating of high quality perovskite layers for efficient solar cells and modules

Abstract: A two-step sequential blade-coating process in air to fabricate high-efficiency perovskite solar cells and modules.

Cited by 73 publications

References 43 publications

Printing High‐Efficiency Perovskite Solar Cells in High‐Humidity Ambient Environment—An In Situ Guided Investigation

Printing High‐Efficiency Perovskite Solar Cells in High‐Humidity Ambient Environment—An In Situ Guided Investigation

Progress of Perovskite Solar Modules

Photovoltaics

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