The Photophysics of Halide Perovskite Solar Cells

Li, Mingjie; Wu, Bo; Sum, Tze-Chien

doi:10.1002/9783527800766.ch2_02

Cited by 3 publications

(2 citation statements)

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“…9 The photophysical properties of perovskite complexes have been extensively investigated by steady-state and time-resolved absorption and photoluminescence spectroscopy in a broad time domain ranging from femtoseconds to seconds. [10][11][12][13] Ultrafast transient absorption (TA) provides key information on the excited state dynamics in perovskites, and particularly on the free carrier dynamics, charge recombination, effective mass, and bandgap renormalization. [14][15][16][17] However, in most of the reported works the spectral window of TA spectroscopy of perovskite films is limited to the visible region, thus precluding crucial information coming from the near-infrared (NIR).…”

Section: Introductionmentioning

confidence: 99%

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Pasanen

Vivo

Canil

et al. 2019

Phys. Chem. Chem. Phys.

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Perovskites have lately attracted a lot of attention as promising materials for the next-generation of efficient, low-cost, and solution processable optoelectronics. Their complex transient photophysics, in time scales ranging from femtoseconds to seconds, have been widely investigated. However, in most of the reported works the spectral window of ultrafast transient absorption (TA) spectroscopy of perovskite films is limited to the visible region, hence missing crucial information coming from the near-infrared (NIR). Furthermore, the measured TA responses are affected by light interference in a thin perovskite layer making data interpretation a challenge even in the visible part of the spectrum. Here, we demonstrate a method that allows us to separately obtain the changes in absorption and refractive index from conventional transmission and reflection pump-probe measurements. We show that the contribution of the absorption change to the response of metal halide perovskite thin films in the NIR is much smaller than that of the refractive index change. Furthermore, the spectral shape of TA responses in the NIR range is predominantly determined by perovskite layer thickness and its refractive index. However, the time profile of the responses bears important information on the carrier dynamics and makes the NIR a useful range to study perovskite photophysics. † Electronic supplementary information (ESI) available: Method details for Dn and Dk calculations and transfer matrix based simulations, including a steady-state transmittance and reflectance simulation. ESI also has an example of primary TA absorption measurements and TA decay profiles and different excitation intensities. See

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Section: Introductionmentioning

confidence: 99%

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Pasanen

Vivo

Canil

et al. 2019

Phys. Chem. Chem. Phys.

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“…Due to a range of 0.5 eV to 3.2 eV of entire sunlight spectrum, the ideal band gap should be between 1.0 and 1.7 eV to motivate electrons without creating too much heat. [12] Figure 2.6 Bandgap diagram for conductors, semiconductors, and insulators.…”

Section: ) Bandgapmentioning

confidence: 99%

Stability Enhancement of CsPbBr3 Quantum Dots by Coating TiO2 as a Surface Encapsulation

Nuket¹

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The cesium lead bromide quantum dots (CsPbBr3 QDs) have exhibited the excellent optical properties which have been widely used in the applications of optoelectronic and photoelectrochemical devices. However, the instability of CsPbBr3 QDs against the environment factors has been a major obstacle hindering the commercialization of corresponding devices. Herein, the new encapsulation process, in-situ method, for CsPbBr3/TiO2 was presented to prevent the agglomeration of the particles and improve the stability of CsPbBr3 QDs without heat treatment at high temperature. The CsPbBr3 QDs were coated with TiO2 by using titanium tetraisopropoxide (TTIP) as a titanium source which was injected during the formation of CsPbBr3 QDs in which the effects of TTIP injection temperature from 25°C to 170°C were studied. The morphological, structural, and optical properties of CsPbBr3/TiO2 prepared by in-situ method were compared with ex-situ method reported in previous study. Besides preventing an aggregation, the in-situ TiO2 coated sample at 25°C exhibited the excellent stability against ambient air, non-polar solvent, water and visible light illumination owing to the protection of TiO2 deposited on the CsPbBr3 QDs surface and the good structure of CsPbBr3 QDs. Finally, the photoelectrochemical results showed that the in-situ coated sample at 100°C had the highest charge transport property among the others.

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Investigation of the Efficiency of CsGeI₃-based solar cell using SCAPS-1D modeling and simulation

Das

Samajdar

Ravidas

2022

2022 IEEE International Conference of Electron Devices Society Kolkata Chapter (EDKCON)

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The Photophysics of Halide Perovskite Solar Cells

Cited by 3 publications

References 86 publications

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Stability Enhancement of CsPbBr3 Quantum Dots by Coating TiO2 as a Surface Encapsulation

Investigation of the Efficiency of CsGeI₃-based solar cell using SCAPS-1D modeling and simulation

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The Photophysics of Halide Perovskite Solar Cells

Cited by 3 publications

References 86 publications

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Refractive index change dominates the transient absorption response of metal halide perovskite thin films in the near infrared

Stability Enhancement of CsPbBr3 Quantum Dots by Coating TiO2 as a Surface Encapsulation

Investigation of the Efficiency of CsGeI3-based solar cell using SCAPS-1D modeling and simulation

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Investigation of the Efficiency of CsGeI₃-based solar cell using SCAPS-1D modeling and simulation