Understanding of perovskite crystal growth and film formation in scalable deposition processes

Liu, Chang; Cheng, Yi‐Bing; Ge, Ziyi

doi:10.1039/c9cs00711c

Cited by 429 publications

(407 citation statements)

References 305 publications

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“…With different doping concentration, remarkable crystal grain sizes about 1.2 μm to 2.5 μm are obtained, much larger than control ones (0.8–1.4 μm; Figure S5). Larger grain sizes indicate less grain boundaries and trap‐state density, [4a, 5a, 6b] also in accordance with the XRD and PL results. The HMFE [(RNH 3 ) 2 PbI 4 ] (Figure S1) and typical perovskite [(FA/MA)Pb(I,Br) 3 ] are analogue with chemically ionic composition.…”

Section: Resultssupporting

confidence: 85%

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Xiao

Zhao

et al. 2020

Angewandte Chemie

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The nonradiative recombination of electrons and holes has been identified as the main cause of energy loss in hybrid organic-inorganic perovskite solar cells (PSCs). Sufficient built-in field and defect passivation can facilitate effective separation of electron-hole pairs to address the crucial issues. Fort he first time,w ei ntroduce ah omochiral molecular ferroelectric into aP SC to enlarge the built-in electric field of the perovskite film, therebyf acilitating effective charge separation and transportation. As ac onsequence of similarities in ionic structure,t he molecular ferroelectric component of the PSC passivates the defects in the active perovskite layers, therebyi nducing an approximately eightfold enhancement in photoluminescence intensity and reducing electron trap-state density.The photovoltaic molecular ferroelectric PSCs achieve apower conversion efficiency as high as 21.78 %.

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Section: Resultssupporting

confidence: 85%

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Xiao

Zhao

et al. 2020

Angewandte Chemie

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“…This study has demonstrated the first formation of thin films of Cs 2 TeI 6 and surveyed their properties with the outcome that the material may now be investigated further as a potential optoelectronic material and an alternative for lead- and tin-containing perovskites in photovoltaics. Furthermore, alternative deposition methods including spray coating, slot-die coating, doctor blading, and screen- and inkjet-printing 39 could be investigated for larger scale fabrication of the films and devices.…”

Section: Discussionmentioning

confidence: 99%

Vacancy-Ordered Double Perovskite Cs₂TeI₆ Thin Films for Optoelectronics

et al. 2020

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Alternatives to lead- and tin-based perovskites for photovoltaics and optoelectronics are sought that do not suffer from the disadvantages of toxicity and low device efficiency of present-day materials. Here we report a study of the double perovskite Cs 2 TeI 6 , which we have synthesized in the thin film form for the first time. Exhaustive trials concluded that spin coating CsI and TeI 4 using an antisolvent method produced uniform films, confirmed as Cs 2 TeI 6 by XRD with Rietveld analysis. They were stable up to 250 °C and had an optical band gap of ∼1.5 eV, absorption coefficients of ∼6 × 10 4 cm –1 , carrier lifetimes of ∼2.6 ns (unpassivated 200 nm film), a work function of 4.95 eV, and a p-type surface conductivity. Vibrational modes probed by Raman and FTIR spectroscopy showed resonances qualitatively consistent with DFT Phonopy -calculated spectra, offering another route for phase confirmation. It was concluded that the material is a candidate for further study as a potential optoelectronic or photovoltaic material.

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“…[26][27][28][29][30] The polymeric growth templates possess nonuniform side chains and their length exceeds the perovskite grain circumferences that aggregations and ineffective placement among the grains can undermine the perovskite film quality. [31,32] Carbon nanotubes are better in this regard as they are shorter in length and rarely aggregate owing to the surrounding surfactants. [33,34] Still, carbon nanotubes have nonuniform tube lengths and metallic impurities, the latter of which results in charge recombination of electrons and holes as the metallic carbon nanotubes have small bandgaps.…”

Section: Doi: 101002/advs202000782mentioning

confidence: 99%

Denatured M13 Bacteriophage‐Templated Perovskite Solar Cells Exhibiting High Efficiency

et al. 2020

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The M13 bacteriophage, a nature-inspired environmentally friendly biomaterial, is used as a perovskite crystal growth template and a grain boundary passivator in perovskite solar cells. The amino groups and carboxyl groups of amino acids on the M13 bacteriophage surface function as Lewis bases, interacting with the perovskite materials. The M13 bacteriophage-added perovskite films show a larger grain size and reduced trap-sites compared with the reference perovskite films. In addition, the existence of the M13 bacteriophage induces light scattering effect, which enhances the light absorption particularly in the long-wavelength region around 825 nm. Both the passivation effect of the M13 bacteriophage coordinating to the perovskite defect sites and the light scattering effect intensify when the M13 virus-added perovskite precursor solution is heated at 90°C prior to the film formation. Heating the solution denatures the M13 bacteriophage by breaking their inter-and intra-molecular bondings. The denatured M13 bacteriophage-added perovskite solar cells exhibit an efficiency of 20.1% while the reference devices give an efficiency of 17.8%. The great improvement in efficiency comes from all of the three photovoltaic parameters, namely short-circuit current, open-circuit voltage, and fill factor, which correspond to the perovskite grain size, trap-site passivation, and charge transport, respectively.

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Understanding of perovskite crystal growth and film formation in scalable deposition processes

Abstract: Introduction of scalable deposition methods along with morphological control of the film will be provided in the review.

Cited by 429 publications

References 305 publications

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Vacancy-Ordered Double Perovskite Cs₂TeI₆ Thin Films for Optoelectronics

Denatured M13 Bacteriophage‐Templated Perovskite Solar Cells Exhibiting High Efficiency

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Understanding of perovskite crystal growth and film formation in scalable deposition processes

Abstract: Introduction of scalable deposition methods along with morphological control of the film will be provided in the review.

Cited by 429 publications

References 305 publications

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

Vacancy-Ordered Double Perovskite Cs2TeI6 Thin Films for Optoelectronics

Denatured M13 Bacteriophage‐Templated Perovskite Solar Cells Exhibiting High Efficiency

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Vacancy-Ordered Double Perovskite Cs₂TeI₆ Thin Films for Optoelectronics