Polyethylenimine-Ethoxylated Interfacial Layer for Efficient Electron Collection in SnO2-Based Inverted Organic Solar Cells

Anefnaf, Ikram; Aazou, Safae; Schmerber, G.; Refki, Siham; Zimmermann, Nicolas; Heiser, T.; Ferblantier, G.; Slaoui, A.; Dinia, A.; Abd‐Lefdil, M.; Sekkat, Zouheir

doi:10.3390/cryst10090731

Cited by 14 publications

(13 citation statements)

References 47 publications

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“…The semiempirical Hamiltonian parameters, such as the LUMO-HOMO energy difference at photocell (ε), driving force (Δε) and hopping integrals ( t ,

, and

) were determined for diverse organic photovoltaic devices by fitting their IQE spectra. The calculated

without adjustable parameters have been compared with the experimental data and a good agreement with a maximal deviation less than 6% was obtained for the three different-type analyzed photovoltaic devices [ 31 , 32 , 33 ]. Finally, we think the presented coarse-grained quantum theory has the merit of being conceptually clear, mathematically simple, computationally efficient, and widely versatile to investigate the long-range exciton diffusion in complex organic composites, as well as to calculate measurable device properties.…”

Section: Discussionmentioning

confidence: 83%

“…In this section, we use the present coarse-grained quantum theory to model diverse organic photovoltaic devices, such as those of a bilayer in Figure 4 a, perovskite in Figure 4 b, and inverted solar cells in Figure 4 c, whose reported IQE (red spheres) [ 31 , 32 , 33 ] are compared with the theoretical ones (blue lines).…”

Section: Theory Versus Experimentsmentioning

confidence: 99%

“…The results of calculated

are shown in Table 2 and compared with those reported in Refs. [ 31 , 32 , 33 ]. Note the remarkable agreement between the measured

and the theoretical ones without adjustable parameters, obtaining a maximum difference of 5.30%.…”

Section: Theory Versus Experimentsmentioning

confidence: 99%

“… (Color online) Experimental (red spheres) and theoretical (blue line) internal quantum efficiency (IQE) versus photon wavelength ( λ ) for ( a ) bilayer [ 31 ], ( b ) perovskite [ 32 ], and ( c ) inverted [ 33 ] solar cells. …”

Section: Figurementioning

confidence: 99%

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Coarse-Grained Quantum Theory of Organic Photovoltaic Devices

Sánchez

Wang

2021

Nanomaterials

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Understanding the exciton dissociation process in organic solar cells is a fundamental issue for the design of high-performance photovoltaic devices. In this article, a parameterized quantum theory based on a coarse-grained tight-binding model plus non-local electron-hole interactions is presented, while the diffusion and recombination of excitons are studied in a square lattice of excitonic states, where a real-space renormalization method on effective chains has been used. The Hamiltonian parameters are determined by fitting the measured quantum efficiency spectra and the theoretical short-circuit currents without adjustable parameters show a good agreement with the experimental ones obtained from several polymer:fullerene and polymer:polymer heterojunctions. Moreover, the present study reveals the degree of polymerization and the true driving force at donor-acceptor interface in each analyzed organic photovoltaic device.

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“…The semiempirical Hamiltonian parameters, such as the LUMO-HOMO energy difference at photocell (ε), driving force (Δε) and hopping integrals ( t ,

, and

) were determined for diverse organic photovoltaic devices by fitting their IQE spectra. The calculated

Section: Discussionmentioning

confidence: 83%

Section: Theory Versus Experimentsmentioning

confidence: 99%

“…The results of calculated

are shown in Table 2 and compared with those reported in Refs. [ 31 , 32 , 33 ]. Note the remarkable agreement between the measured

and the theoretical ones without adjustable parameters, obtaining a maximum difference of 5.30%.…”

Section: Theory Versus Experimentsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Coarse-Grained Quantum Theory of Organic Photovoltaic Devices

Sánchez

Wang

2021

Nanomaterials

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“…The dominant peak could be related to one exciton and two photons' generations. 51 The results also showed that the intensity of absorption peaks increased after addition B-CQDs into blend.…”

Section: Optical and Morphological Characterization Of Organic Photoactive Layermentioning

confidence: 86%

The hydrothermal synthesis of blue-emitting boron-doped CQDs and its application for improving the photovoltaic parameters of organic solar cell

2021

Turk J Chem

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In this work, boron-doped CQDs (B-CQDs) were synthesized by using boric acid, urea, and citric acid via hydrothermal method to use as a novel additive material for poly(3-hexylthiophene-2,5-diyl) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) based organic solar cells. The OSCs with an inverted device structure were fabricated on titanium dioxide (TiO2) thin film. It was showed the crystallinity, morphological and optical properties of P3HT:PCBM films improved after B-CQDs additive. The best performance was obtained to be a 39.65% of FF, a 546 mV of Voc, an 8.606 mA cm -2 of Jsc after 3 vol.% B-CQDs addition in P3HT:PCBM blend. The power conversion efficiency (PCE) enhanced from 1.72% (non-doped device) to 2.33% (3% of B-CQDs) (a ~ 35% increase). The obtained results provided that B-CQDs are promising materials to improve the performance of solar cell applications. The novelty of this work is to improve the performance of OSCs using cost-effective and eco-friendly Boron CQDs as an additive. Besides achieved a good PCE of OSCs, it is necessary for utilized clean and green energy.

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Cellulose Nanocrystals–Tin‐Oxide Hybrid Electron Transport Layers for Solar Energy Conversion

Niazi

Zhao

Lamarche

et al. 2022

Adv Materials Inter

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molecular designs of both the nonfullerene acceptor (NFAs) and polymer donor components of bulk heterojunctions (BHJs), charge transport layers, and interlayers have led to the laboratory-scale demonstrations of organic solar cells with PCEs approaching 19%. [4,5] In particular, the metal-oxide electron transport layers (ETLs) have been instrumental in this pursuit enabling efficient charge extraction by reducing the energetic barrier between BHJs and cathodes. [6] In the past few decades, zinc oxide (ZnO) has widely been employed in OPVs as an ETL. However, device instability challenges (ascribed to UV absorption) have triggered a search for better ETLs. [7] Recently, SnO 2 has gained attention as ZnO replacement in bottom cathode OPVs. [8] SnO 2 offers higher electron mobility (100-200 cm 2 V −1 s −1 ), better optical transparency in the visible region of the solar spectrum, and a wider energy bandgap (E g ) than ZnO. [9] Moreover, water-based suspensions of SnO 2 nanoparticles allow eco-friendly thin-film processability, making them ideal candidates for sustainable OPV technology development. However, solution-processed SnO 2 ETL films possess surface traps that limit charge extraction and interfacial charge transport in solar cells by inducing nonradiative electron-hole recombination at the SnO 2 -BHJ interfaces. [10,11] Considering defective surfaces of solution-processed metal oxides and energetic misalignments at the BHJ-ETL interfaces, it is critical to develop an interlayer that meets a few critical attributes to realize stable and efficient OPVs. [12] The interlayer material should be optically transparent, solution-processable (from eco-friendly solvents at low temperatures) into uniform and ultrathin continuous smooth films, and chemically and thermally stable. Furthermore, it should be capable of effectively blocking the holes and tuning the work function of ETLs without deteriorating their surface topography or conductivity. To this end, various interface modification strategies have been adopted to passivate the SnO 2 surface defects to enhance the performance and stability metrics in OPVs. For instance, interlayers of quantum dots and polymer electrolytes (i.e., PFN derivatives) have been employed on SnO 2 to reduce the interfacial traps and energy misalignment, leading to enhanced photovoltaic performance. [13,14] Polyethyleneimine-ethoxylated Petro-derived organic cathode interlayers (CILs) can modify the tin-oxide (SnO 2 ) electron transport layer (ETL) in organic photovoltaics (OPVs) to address the energy-level alignment, charge extraction, and device shelf-life instability challenges. However, the potential eco-hazardousness of petro sources used to synthesize such CILs and the toxicity of processing solvents warrant the discovery of sustainable and commercially viable substitutes. Herein, a low-cost, biocompatible, and water-processable CIL based on amine-functionalized cellulose nanocrystals (CNC-a) is introduced to enhance the performance of OPVs by mitigating surface defects of the SnO 2 ...

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Polyethylenimine-Ethoxylated Interfacial Layer for Efficient Electron Collection in SnO2-Based Inverted Organic Solar Cells

Cited by 14 publications

References 47 publications

Coarse-Grained Quantum Theory of Organic Photovoltaic Devices

Coarse-Grained Quantum Theory of Organic Photovoltaic Devices

The hydrothermal synthesis of blue-emitting boron-doped CQDs and its application for improving the photovoltaic parameters of organic solar cell

Cellulose Nanocrystals–Tin‐Oxide Hybrid Electron Transport Layers for Solar Energy Conversion

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