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Photo-generated Cha...
Photo-generated Charge Trapping in Phase Segregated Halide Perovskites : A Comprehensive Approach towards Efficient Photo-Rechargeable Ion Capacitors
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- Kumar, Tanuj (författare)
- Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India.
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- Kumar, Ankush (författare)
- Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India.;Nanyang Technol Univ Singapore, Sch Phys & Math Sci, 21 Nanyang link, Singapore City 637371, Singapore.
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- Beniwal, Shivang (författare)
- Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India.
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- Kumar, Ramesh (författare)
- Uppsala universitet,Fysikalisk kemi,Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India
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- Bag, Monojit (författare)
- Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India.;Indian Inst Technol Roorkee, Ctr Nanotechnol, Roorkee 247667, India.
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Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India Indian Inst Technol Roorkee, Adv Res Electrochem Impedance Spect Lab, Roorkee 247667, India.;Nanyang Technol Univ Singapore, Sch Phys & Math Sci, 21 Nanyang link, Singapore City 637371, Singapore. (creator_code:org_t)
- Wiley-VCH Verlagsgesellschaft, 2023
- 2023
- Engelska.
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Ingår i: Batteries & Supercaps. - : Wiley-VCH Verlagsgesellschaft. - 2566-6223. ; 6:10
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The right balance between photo-absorption and electronic-ionic conductivity is needed for photo-rechargeable bifunctional devices for off-grid energy applications. Recently halide perovskites have been utilized for photo-rechargeable supercapacitors, but the mechanism of photo-capacitance enhancement is not known. Herein, we have fabricated mixed halide perovskites-based photo-rechargeable supercapacitors in two ways and examined the energy harvesting and storage capabilities of these devices. The porous electrode prepared from the mixed halide perovskites (CH3NH3PbBr2I) shows photo-capacitance enhancement up to 15 F/g, while the electrode prepared from the blend of CH3NH3PbBr3 and CH3NH3PbI3 (2 : 1 by molar ratio) shows the photo-capacitance diminution up to 12 F/g. Despite higher specific capacitance (~38 F/g in dark) in blend perovskites due to increased ion diffusion, the photo-generated charge trapping at nanoscale phase segregation is responsible for the diminution in photo-capacitance of these bifunctional devices, while a uniform mixing of halide ions in mixed halide perovskites nanocrystals leads to increased photo-capacitance.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- inter-diffusion of ions
- phase segregation
- photo-rechargeable
- trapping
- de-trapping
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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