Compact nanostructured TiO 2 deposited by aerosol spray pyrolysis for the hole-blocking layer in a CH 3 NH 3 PbI 3 perovskite solar cell

Supasai, Thidarat; Henjongchom, Nakorn; Tang, I‐Ming; Deng, Fei; Rujisamphan, Nopporn

doi:10.1016/j.solener.2016.07.035

Cited by 42 publications

(20 citation statements)

References 68 publications

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“…Aerosolized forms of Pb(NO 3 ) 2 were generated by an ultrasonic mist generator and then were transported using a nitrogen (N 2 ) carrier gas with a flow rate of 3 L min −1 toward a FTO substrate heated at 70 °C for 15 min. Due to the nature of the vibrating plate used in a mist maker, aerosolized forms (aerosols) having a very small diameter in a range of 0.001 to 0.003 mm were generated . Then, the aerosols of the MAI dissolved in absolute ethanol having a concentration of 0.3 mol L −1 were generated in a similar manner to that of Pb(NO 3 ) 2 and sequentially sprayed onto the as‐sprayed‐on Pb(NO 3 ) 2 .…”

Section: Resultsmentioning

confidence: 99%

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Henjongchom

Rujisamphan

Tang

et al. 2018

Physica Status Solidi (a)

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A simple deposition process for preparing crystalline semiconductors with low degrees of disorder is of paramount interest for both device applications and research investigations. This study centers on the ultrasonically sprayedaerosol based approach for preparing crystals of methylammonium lead trihalide perovskite (CH 3 NH 3 PbI 3 ). The surface photovoltage (SPV) spectra are found to depend strongly on the preparation conditions, with the SPV signals (below the material's band gap) providing information on the defect states. The measured values of tail states near the band gap (E t ) are found to be about 21 and 52 meV for the CH 3 NH 3 PbI 3 crystals prepared by the ultrasonically sprayed-on and spun casting approaches, respectively.

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Section: Resultsmentioning

confidence: 99%

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Henjongchom

Rujisamphan

Tang

et al. 2018

Physica Status Solidi (a)

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“…There are various preparation processes for the electron transport layer, including pyrolytic spraying [18], atomic layer deposition [19], thermal oxidation [20], electrochemical deposition, and liquid-phase spin-coating. The most widely used and simplest process is the liquid-phase spin-coating method [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

et al. 2020

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The film quality of the electron transport layer (ETL) plays an important role in improving the performance of perovskite solar cells (PSCs). In order to reduce the effect of rough fluorine-doped SnO2 (FTO)substrate on the film quality of the TiO2 ETL, multiple cycles of spin-coating were employed to realize optimized TiO2 film and improve the performance of PSCs with rough FTO. The results show that TiO2 ETL was optimized most effectively using two spin-coating cycles, obtaining the best performance of PSCs with rough FTO. The carbon electrode-based PSCs were then demonstrated. Our work discusses the feasibility of low-quality rough FTO for the fabrication of PSCs and photodetectors to reduce costs.

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“…The ETM often consists of a bilayer constituted by a compact (c‐TiO 2 ) and mesoporous titania (m‐TiO 2 ) junctions engineered to reduce hysteresis and improve charge transfer . For this purpose, TiO 2 films have been deposited using various techniques, like spin‐coating, spray pyrolysis, and atomic layer deposition (ALD) to control their grain size, conformity and compactness.…”

Section: Introductionmentioning

confidence: 99%

Highly Compact TiO₂ Films by Spray Pyrolysis and Application in Perovskite Solar Cells

et al. 2019

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Transparent and pinhole free hole-blocking layers such as TiO 2 grown at low temperatures and by scalable processes are necessary to reduce production costs and thus enabling commercialization of perovskite solar cells. Here, the authors compare the transport properties of TiO 2 compact layers grown by spray pyrolysis from commonly used titanium diisopropoxide bisacetylacetonate ([Ti(OPr i ) 2 (acac) 2 ]) precursor to films grown by spray pyrolysis of TiCl 4 . Spray pyrolysis provides insights into the interdependence of precursor chemistry and electron transport properties of TiO 2 films and their influence on the performance of the perovskite solar cells. X-ray diffraction and X-ray photoelectron spectroscopy data confirm the chemical and structural composition of the obtained films. Thin film deposition at lower temperature (150 C) are conducted using TiCl 4 to evaluate the influence of crystal growth and topography by scanning electron microscopy and atomic force microscopy as well as thickness (profilometry) and transmittance (UV/Vis spectroscopy) on the power conversion efficiency of perovskite solar cells. TiO 2 compact layers grown from TiCl 4 enhance the power conversion efficiency by acting as superior electron transfer medium and by reducing hysteresis behavior, when compared to films grown using titanium diisopropoxide bisacetylacetonate. UV/Vis spectroscopy and external quantum efficiency studies reveal the correlation of transmittance on the power conversion efficiency.

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Compact nanostructured TiO 2 deposited by aerosol spray pyrolysis for the hole-blocking layer in a CH 3 NH 3 PbI 3 perovskite solar cell

Cited by 42 publications

References 68 publications

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

Highly Compact TiO₂ Films by Spray Pyrolysis and Application in Perovskite Solar Cells

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Compact nanostructured TiO 2 deposited by aerosol spray pyrolysis for the hole-blocking layer in a CH 3 NH 3 PbI 3 perovskite solar cell

Cited by 42 publications

References 68 publications

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH3NH3PbI3 Perovskite Crystals

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH3NH3PbI3 Perovskite Crystals

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

Highly Compact TiO2 Films by Spray Pyrolysis and Application in Perovskite Solar Cells

Contact Info

Product

Resources

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Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed‐Aerosol CH₃NH₃PbI₃ Perovskite Crystals

Highly Compact TiO₂ Films by Spray Pyrolysis and Application in Perovskite Solar Cells