Photoinduced interfacial electron transfer from perovskite quantum dots to molecular acceptors for solar cells

Sachith, Bhagyashree Mahesha; Zhang, Zhijing; Subramanyam, Palyam; Subrahmanyam, Ch.; Furube, Akihiro; Tamai, N.; Okamoto, Toshio; Misawa, Hiroaki; Biju, Vasudevanpillai

doi:10.1039/d3nr01032e

Cited by 5 publications

(1 citation statement)

References 45 publications

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“…Photovoltaic devices have been developed as a renewable, clean energy technology to tackle serious global warming environmental issues . Perovskite solar cells (PSCs) are the most encouraging emerging PV technology because of their low cost, , simple solution processing, high optical absorption coefficients over the solar spectrum, tunable bandgap, low exciton binding energies, long-range carrier diffusion, and high defect tolerance . Organic–inorganic hybrid PSCs have made rapid progress, where the power conversion efficiency (PCE) has advanced drastically from 3.8 to 25.7% , in the past decade.…”

Section: Introductionmentioning

confidence: 99%

Crystallization Retardation and Synergistic Trap Passivation in Perovskite Solar Cells Incorporated with Magnesium-Decorated Graphene Quantum Dots

Kalanaki,

Abdi,

Rahsepar

2023

ACS Omega

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One of the encouraging strategies for enhancing the efficiency of perovskite solar cells (PSCs) is to reduce defects, trap states of pinholes, and charge recombination rate in the light absorber layer of perovskite, which can be addressed by increasing the perovskite grain size. The utilization of Mg-decorated graphene quantum dots (MGQD) or graphene quantum dots (GQDs) into a perovskite precursor solution for further crystal modification is introduced in this study. Studies on the crystalline structure and morphology of MGQD generated from GQDs demonstrate that MGQD has a greater crystal size than GQD. Therefore, higher light absorption in the whole UV−vis spectrum and a larger grain size for the perovskite/MGQD layer compared to the perovskite/ GQD sample are achieved. Moreover, more photoluminescence peak quenching of perovskite/MGQD and extended carrier recombination lifetime (from 3 to 40 ns) verify the surface and grain boundary trap passivation compared to pristine perovskite. Consequently, PSCs in an n-i-p configuration containing perovskite/MGQD show a higher performance of 10.2% in comparison to the pristine perovskite at 7.2%, attributed to the enhanced J SC from 13.2 to 19.1 mA cm −2 . Thus, incorporating MGQDs into the perovskite layer is a hopeful approach for obtaining a superior perovskite film with impressive charge extraction and decreased nonradiative charge recombination.

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Section: Introductionmentioning

confidence: 99%

Crystallization Retardation and Synergistic Trap Passivation in Perovskite Solar Cells Incorporated with Magnesium-Decorated Graphene Quantum Dots

Kalanaki,

Abdi,

Rahsepar

2023

ACS Omega

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Photoinduced Electron Transfer System from Cesium Lead Bromide Quantum Dots to Naphthalenediimide Supramolecular Polymers

Manoj Lena,

Yamauchi,

Murakami

et al. 2024

Chemistry An Asian Journal

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Supramolecular polymers (SPs) formed via the stacking of π‐conjugated molecules are attractive nanomaterials because of their potential optoelectronic properties derived from the non‐covalent interaction between the π‐skeletons. Especially, SPs possessing naphthalenediimide (NDI) core units can act as superior electron acceptors due to their deep lowest unoccupied molecular orbital (LUMO). Interaction of such SP with electron donors can realize a charge transfer system, but this has not been established. Herein, we report a photoinduced electron transfer system from cesium lead bromide quantum dot (QD) as an electron donor to SP composed of cholesterol‐functionalized NDI derivatives. The supramolecular polymerization in a non‐polar solvent was analyzed in detail via microscopic and spectroscopic analyses. Upon mixing the SP with QDs, the photoluminescence intensity and lifetime of QDs decreased significantly, indicating efficient photoinduced electron transfer from QD to SP.

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Synthesis, characterization, and practical applications of perovskite quantum dots: recent update

Chandra,

Mustafa,

Ghadir

et al. 2024

Naunyn-Schmiedeberg's Arch Pharmacol

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Photoinduced interfacial electron transfer from perovskite quantum dots to molecular acceptors for solar cells

Abstract: Bandgap-engineered inorganic and hybrid halide perovskite (HP) films, nanocrystals, and quantum dots (PQDs) are promising for solar cells. Electron-acceptor-engineered HP surfaces offer donor-acceptor (D-A) interfaces for efficient energy harvesting throughout...

Cited by 5 publications

References 45 publications

Crystallization Retardation and Synergistic Trap Passivation in Perovskite Solar Cells Incorporated with Magnesium-Decorated Graphene Quantum Dots

Crystallization Retardation and Synergistic Trap Passivation in Perovskite Solar Cells Incorporated with Magnesium-Decorated Graphene Quantum Dots

Photoinduced Electron Transfer System from Cesium Lead Bromide Quantum Dots to Naphthalenediimide Supramolecular Polymers

Synthesis, characterization, and practical applications of perovskite quantum dots: recent update

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