Low temperature and rapid formation of high quality metal oxide thin film <i>via</i> a hydroxide-assisted energy conservation strategy

Jao, Meng‐Huan; Cheng, C. H.; Lu, Chun‐Fu; Hsiao, Kai‐Chi; Su, Wei‐Fang

doi:10.1039/c8tc03544j

Cited by 16 publications

(15 citation statements)

References 34 publications

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“…S14c and S14d (SI), respectively. Both GIWAXS patterns feature the scattering ring at q r = 1.45 Å − 1 , corresponding to (100) planes [61,62]. The radial integration curves of the NiO + 5% Cs 2 CO 3 and NiO films display full widths at half maximum (FWHMs) for their (100) diffraction peaks of 0.489 and 0.648 [calculated from the areas selected in yellow regions in Figs.…”

Section: Resultsmentioning

confidence: 99%

Low-temperature processed bipolar metal oxide charge transporting layers for highly efficient perovskite solar cells

Singh

Yang

Weng

et al. 2021

Solar Energy Materials and Solar Cells

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Section: Resultsmentioning

confidence: 99%

Low-temperature processed bipolar metal oxide charge transporting layers for highly efficient perovskite solar cells

Singh

Yang

Weng

et al. 2021

Solar Energy Materials and Solar Cells

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“…For hole transport layer, the TMAOH‐assisted NiO x precursor solution, was prepared according to the procedure reported in the literature in ambient air. [ 37 ] Typically, 74.6 mg nickel acetate tetrahydrate (Ni(CH 3 COO) 2 ·4H 2 O, 99.0%, Showa Chemical) was dissolved in 1 mL of ethanol (anhydrous, Fisher Chemical). The solution was then stirred at 60 °C until it became transparent.…”

Section: Methodsmentioning

confidence: 99%

“…Each layer is uniform prepared within 20 s except HTL. The activation energy of NiO x crystallization is one order of higher than that of the perovskite layer, [ 37 ] so it takes 216 s to process. The fabrication of commonly used PEI as WFL was not successfully deposited by using slot‐die regardless hot plate (HP) heating or NIR heating because the isopropyl alcohol (IPA) of PEI solution cannot evaporate off fast enough; it penetrates into PCBM layer and attacks the perovskite layer.…”

Section: Introductionmentioning

confidence: 99%

Toward All Slot‐Die Fabricated High Efficiency Large Area Perovskite Solar Cell Using Rapid Near Infrared Heating in Ambient Air

Huang

Guan

Lee

et al. 2020

Advanced Energy Materials

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However, the impressive high PCE was obtained from small area cell (<1 cm 2) using non-up-scalable spin coating method in nitrogen. [1-3] To make commercially viable PSC, the development of low cost and large area fabrication process in ambient air is imperative. Many processes are available in industry for largescale area coating such as dip coating, blade coating, and slot-die coating, etc. Among them, the slot-die coating is preferable because the precision control of coating thickness and solution usage (i.e., minimum wastage of material). [4-7] The slot-die coating is also suitable to be adopted for continuously process which can reduce the cost of manufacturing even further. High performance PSC has been fabricated by scalable process such as blade coating, slot-die coating and spray coating. [8-14] However, most of studies concentrated on the perovskite layer processing in controlled environment. Only limited reports are on the scalable process operated in ambient air. [15-18] The commonly used architecture of p-in PSCs contains four layers deposited by solution process, and those four layers include hole transport layer (HTL), light absorption perovskite layer, electron transport layer (ETL) and work function modifier layer (WFL). First, all the solvents used in the processing of each layer should be nontoxic for the scalable process. [19-21] Then the balance among suitable chemical composition of each layer, solvent type, film morphology control, compatibility between layers, the stability of each layers to have a workable ambient air processing system is quite challenge in terms of science and engineering. The film morphology and compatibility of each layer of PSCs are controlled by the chemical compositions of each layer and processing condition. For the perovskite layer, the film morphology is determined by the kinetic rate of solvent evaporation and crystallization. [22-23] For spin coating, most of the solvents are removed rapidly by the coater rotation and the anti-solvent dripping. [24] However, the rate of the solvent evaporation of slot-die coating is lower than that of spin coating. [17,25-26] The strategies such as anti-solvent bath, gas quenching and pre-heat substrate method are adopted to increase the rate of solvent evaporation. [11,27-31] Although the high PCE devices can be achieved, the results are only performed on small-area substrate. If the Currently, high-efficiency perovskite solar cells are mainly fabricated by the spin-coating process, which limits the possibility of commercial mass-production of perovskite solar cells. In this work, the slot-die coating process is combined with near-infrared irradiation heating to quickly manufacture perovskite solar cells in air. The composition of the perovskite precursor solution is tuned by adding n-butanol, with its low boiling point and low surface tension, to increase the near-infrared energy absorption, facilitate the evaporation of the solvent system and film formation, and accelerate the crystallization of perovskite. High-quality uni...

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“…This effect has been reported in a recent work by Jao and others. 31 With the presence of hydroxyl anions from tetramethylammonium hydroxide (TMAOH), the reaction rate for synthesizing NiO from nickel acetate was increased by two times, while the activation energy was decreased from 107 kJ mol À1 to 59 kJ mol À1 .…”

Section: Fabrication and Characterization Of Itoh Nanoparticles And Imentioning

confidence: 99%

Ethanolamine-assisted low-temperature crystallization of hydroxide nanoparticle ink into transparent and conductive ITO layers

et al. 2019

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Low temperature and rapid formation of high quality metal oxide thin film via a hydroxide-assisted energy conservation strategy

Abstract: We develop a universal hydroxide-assisted strategy for the low thermal budget efficient fabrication of high quality metal oxide thin films.

Cited by 16 publications

References 34 publications

Low-temperature processed bipolar metal oxide charge transporting layers for highly efficient perovskite solar cells

Low-temperature processed bipolar metal oxide charge transporting layers for highly efficient perovskite solar cells

Toward All Slot‐Die Fabricated High Efficiency Large Area Perovskite Solar Cell Using Rapid Near Infrared Heating in Ambient Air

Ethanolamine-assisted low-temperature crystallization of hydroxide nanoparticle ink into transparent and conductive ITO layers

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