Mechanism for Enhancing Photocurrent of Hot Electron Collection Solar Cells by Adding LiF on the Outmost MAPbI<sub>3</sub>Perovskite Layer

Liao, Li Ping; Wang, Gang; Yao, Yanqing; Niu, Lian Bin; Xu, Cunyun; Zhou, Guang; Li, Ping; Song, Qunliang

doi:10.1109/jphotov.2020.3035290

Cited by 6 publications

(1 citation statement)

References 29 publications

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“…For example, zeolitic imidazolate framework (ZIF-8)/TiO 2 and CuGaO 2 /TiO 2 nanocomposites and different dielectric materials/TiO 2 nanocomposite materials can be formulated to enhance the light absorption capability of TiO 2 to further enhance the photocatalysis of TiO 2 . , Ti 3+ self-doped blue-TiO 2 showed remarkable Fenton-like activity when a built-in strong electric field of porphyrin was incorporated, producing rapid multichannel charge transfer . In addition, the light absorption capability of TiO 2 can be enhanced by coating TiO 2 with antireflection (ARC) materials like LiF and polydimethylsiloxane (PDMS) polymer, as both materials were found to enhance the light absorption of other visible absorbing semiconductors like metal halide perovskites. − …”

Section: Future Perspectivesmentioning

confidence: 99%

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

2023

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Titanium dioxide (TiO2) is a wide bandgap semiconductor that has a wide range of applications including wastewater treatment, photocatalysis, solar cells, and sensors owing to its excellent electronic and optical properties. However, the wide bandgap of TiO2 (∼3.2 eV) along with the recombination processes of the photoexcited charge carriers reduce its interfacial charge transport properties and respective activities. Energetics, optical response, and corresponding photophysics of excited charge carriers can be altered through doping and codoping of TiO2 and composite formulation. Therefore, it is very crucial to understand the structure–property and property-application relationships of doped, co-doped, and composite TiO2 to maximize the efficiency and extend the fundamental understanding for their applications in different fields. In this Perspective, we summarize the ongoing research on the advancement of undoped, doped, co-doped, and composite TiO2 including their structure and morphology, energetics, and corresponding photophysics relative to their applications in photocatalysis, wastewater treatment, and water-splitting reactions. We then propose our perspectives on the future potential of energetic manipulation of photocatalytic TiO2 to develop advanced and highly efficacious catalytic materials.

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Section: Future Perspectivesmentioning

confidence: 99%

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

2023

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Constructing All‐Inorganic Perovskite/Fluoride Nanocomposites for Efficient and Ultra‐Stable Perovskite Solar Cells

Wei

Zhao

Liu

et al. 2021

Adv Funct Materials

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Organic-inorganic hybrid perovskite solar cells (PSCs) have rapidly developed over the past decade and have achieved the latest certified power conversion efficiency (PCE) up to 25.5%. However, unsatisfactory long-term operational stability for these hybrid PSCs remains a huge obstacle to further development and commercialization. Herein, a unique hetero-structured CsPbI 3 / CaF 2 perovskite/fluoride nanocomposites (PFNCs) is fabricated via a newly developed facile two-step hetero-epitaxial growth strategy to deliver efficient and ultra-stable PSCs. After being incorporated into the crystal lattice of α-phase CsPbI 3 perovskite, the cubic-phase CaF 2 in the resultant CsPbI 3 / CaF 2 PFNCs can not only passivate the intrinsic defects of CsPbI 3 perovskite itself but also effectively suppress the notorious ion migration in hybrid perovskite Cs 0.05 FA 0.81 MA 0.14 PbI 2.55 Br 0.45 (CsFAMA) thin-films of PSCs. As such, the CsFAMA PSC devices based on CsPbI 3 /CaF 2 -deposited perovskite thin-film achieve a mean PCE of 20.45%, in sharp contrast to 19.33% of the control devices without deposition. Specifically, the CsPbI 3 /CaF 2 -deposited PSC retains 85% of its original PCE after 1000 h continuous operation at the maximum power point under AM 1.5G solar light, far better than those of the control and CsPbI 3 -deposited PSCs with a device T 85 lifetime of 315 and 125 h, respectively.

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Vertical‐type 3D/Quasi‐2D n‐p Heterojunction Perovskite Photodetector

Hsiao

Cheng

Hsu

et al. 2023

Adv Funct Materials

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This research demonstrates a state‐of‐the‐art vertical‐transport photodetector with an n‐type 3D MAPbI3/p‐type quasi‐2D (Q‐2D) BA2MA2Pb3I10 perovskite heterojunction. This structure introduces a ≈0.6 V built‐in electric field at the n‐p junction that greatly improves the characteristics of the perovskite photodetector, and the presence of Q‐2D perovskite on the surface improves the life. The electrical polarities of the 3D and the Q‐2D perovskite layers are simply controlled by self‐constituent doping, making clearly defined n‐p characteristics. Doctor‐blade coating is used to fabricate the photodetector with a large area. The Q‐2D materials with highly oriented (040) Q‐2D (n = 2,3) planes are near the surface, and the (111) preferred planes mixed with high index Q‐2D materials (n = 4,5) are found near the 3D/Q‐2D interface. The stacking and interface are beneficial for carrier extraction and transport, yielding an external quantum efficiency of 77.9%, a carrier lifetime long as 295.7 ns, and a responsibility of 0.41 A W−1. A low dark current density of 6.2 × 10−7 mA cm−2 and a high detectivity of 2.82 × 1013 Jones are obtained. Rise time and fall time are fast as 1.33 and 10.1 µs, respectively. The results show the application potential of 3D/Q‐2D n‐p junction perovskite photodetectors.

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Mechanism for Enhancing Photocurrent of Hot Electron Collection Solar Cells by Adding LiF on the Outmost MAPbI₃Perovskite Layer

Cited by 6 publications

References 29 publications

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

Constructing All‐Inorganic Perovskite/Fluoride Nanocomposites for Efficient and Ultra‐Stable Perovskite Solar Cells

Vertical‐type 3D/Quasi‐2D n‐p Heterojunction Perovskite Photodetector

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Mechanism for Enhancing Photocurrent of Hot Electron Collection Solar Cells by Adding LiF on the Outmost MAPbI3Perovskite Layer

Cited by 6 publications

References 29 publications

Mechanistic Understanding in Manipulating Energetics of TiO2 for Photocatalysis

Mechanistic Understanding in Manipulating Energetics of TiO2 for Photocatalysis

Constructing All‐Inorganic Perovskite/Fluoride Nanocomposites for Efficient and Ultra‐Stable Perovskite Solar Cells

Vertical‐type 3D/Quasi‐2D n‐p Heterojunction Perovskite Photodetector

Contact Info

Product

Resources

About

Mechanism for Enhancing Photocurrent of Hot Electron Collection Solar Cells by Adding LiF on the Outmost MAPbI₃Perovskite Layer

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis

Mechanistic Understanding in Manipulating Energetics of TiO₂ for Photocatalysis