Charge-carrier-mobility-dependent-open-circuit-voltage-in-organic-and-hybrid-solar-cells

Ompong, David; Singh, Jai

doi:10.15761/fnn.1000108

Cited by 11 publications

(7 citation statements)

References 17 publications

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“…This can be attributed to the presence of ZnO nanoparticles, similar V OC values being also obtained for the hybrid structures embedding this metal oxide [42]. A recent study shows that the V OC is dependent on the charge-carrier mobility, in both organic and hybrid solar cells, more specifically on the electron and hole mobility ratio [43]. It is known that the organic semiconductors have a low mobility comparatively with that of the inorganics.…”

Section: Resultssupporting

confidence: 77%

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

et al. 2020

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Matrix-assisted pulsed laser evaporation (MAPLE) was used to deposit hybrid nanocomposite thin films based on cobalt phthalocyanine (CoPc), C60 fullerene and ZnO nanoparticles. The inorganic nanoparticles, with a size of about 20 nm, having the structural and optical properties characteristic of ZnO, were chemically synthesized by a simple precipitation method. Furthermore, ZnO nanoparticles were dispersed in a dimethyl sulfoxide solution in which CoPc and C60 had been dissolved, ready for the freezing MAPLE target. The effect of the concentration of ZnO nanoparticles on the structural, morphological, optical and electrical properties of the CoPc:C60:ZnO hybrid nanocomposite layers deposited by MAPLE was evaluated. The infrared spectra of the hybrid nanocomposite films confirm that the CoPc and C60 preserve their chemical structure during the laser deposition process. The CoPc optical signature is recognized in the ultraviolet–visible (UV–Vis) spectra of the obtained layers, these being dominated by the absorption bands associated to this organic compound while the ZnO optical fingerprint is identified in the photoluminescence spectra of the prepared layers, these disclosing the emission bands linked to this inorganic semiconductor. The hybrid nanocomposite layers exhibit globular morphology, which is typical for the thin films deposited by MAPLE. Current-voltage (J-V) characteristics of the structures developed on CoPc:C60:ZnO layers reveal that the addition of an appropriate amount of ZnO nanoparticles in the CoPc:C60 mixture leads to a more efficient charge transfer between the organic and inorganic components. Due to their photovoltaic effect, structures featuring such hybrid nanocomposite thin films deposited by MAPLE can have potential applications in the field of photovoltaic devices.

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Section: Resultssupporting

confidence: 77%

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

et al. 2020

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“…In Figure (c,d), we studied the effect of electron and hole mobility on the performance parameters of both the nanostructures. The effect of μ on the J sc can be explained with the help of eq , referenced from ref . J = J n + J p = μ n ∇ E F , e + μ p E F , h where J n = μ e,n ∇E F,e is the electron current density and J p = μ h,n ∇E F,h is the hole current density. Here n ( p ) is the electron (hole) density, μ n ( μ p ) is the electron (hole) mobility, and E F,n(h) is the quasi-Fermi level of electrons (holes).…”

Section: Resultsmentioning

confidence: 99%

Systematic Investigation of the Optoelectronic Properties of GaAs Nanowire and Nanocone Solar Cells: Effect of Geometrical Nonuniformities, Angle of Incidence, and Structural and Electronic Parameters

Prashant,

Agnihotri,

Bhattarai

et al. 2023

ACS Appl. Electron. Mater.

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There are numerous research articles on the optoelectronic modeling of GaAs nanostructures such as nanowires (NWs) and nanocones (NCs), which have demonstrated promising possibilities for future solar cell (SC) applications. However, the relationship between the optical and electrical performance of the GaAs NW and NC array-based SCs is not well documented. In this paper, we present a thorough optoelectronic modeling of both the nanostructures and compare their overall photovoltaic performance for different conditions. We found that GaAs NCs can achieve outstanding optical absorption and negligible reflection losses over the entire absorption spectrum. Furthermore, the NC structure, for its optimal geometric configuration, achieved an average absorption (A(λ)) of 94%, photocurrent (J sc ) of 31 mA/cm 2 , and photogeneration rate (G optical ) of 5.2 × 10 22 cm −3 s −1 . Additionally, for oblique incidence, the GaAs NC has demonstrated substantially improved light-trapping and antireflection characteristics. Under different geometric nonuniformities, GaAs NC array outperformed the GaAs NW array with an A(λ) of 91.3%, J sc of 30.5 mA/cm 2 , and G optical of 3.45 × 10 22 cm −3 s −1 . The electrical simulations reveal that the GaAs NC can achieve a remarkable power conversion efficiency (PCE) of 19.2%, despite having a very short minority carrier lifetime (τ) and carrier mobility of (μ) of 2 ns and 1100 cm 2 V −1 s −1 , respectively.

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“…The higher J SC of the PVSCs based on PDTT-T is thought to be attributed to the better interface morphology and carrier transport of PDTT-T–HTL. The higher V OC of the PVSCs based on PDTT-T than PDT-T can be explained from eq …”

Section: Resultsmentioning

confidence: 99%

Donor–Acceptor Type Polymers Containing Fused-Ring Units as Dopant-Free, Hole-Transporting Materials for High-Performance Perovskite Solar Cells

Wang

Zhuang

You

et al. 2020

ACS Appl. Energy Mater.

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Hole-transporting layer (HTL) plays a key role in most high-efficiency perovskite solar cells (PVSCs). Especially in the n-i-p conventional PVSCs, HTL promotes device performances through multiple ways, including hole injection and transport, interface optimization, inhibition of charges recombination, and protection of the perovskite active layer from oxygen, water, and metal electrode. Although spirobased small-molecular hole-transporting materials (HTMs) brought PCE records of PVSCs one by one, the poor film quality and requirement of additives brought some negative effects on the long-term stability of the devices. Therefore, dopant-free, compact polymeric HTLs attract intensive attention as potential alternatives to doped spiro-based ones. Among polymeric HTMs, electron donor (D)−acceptor (A)-type polymers become promising HTMs owing to the superior hole-transporting properties. In this work, two D−A polymers containing fused rings perform as dopant-free HTMs. The fused-ring ladder-type units can facilitate carrier transport, electron donation, and π−π stacking interactions. Polymers PDT-T and PDTT-T employ the same A unit of BDD and π-bridge of thiophene and different D units of IDT and IDTT. Both polymers exhibit favorable properties as HTMs including high hole mobility, well-matched energy levels, and excellent film-formation ability. Along with a peak PCE of 19.02%, the superior device stabilities of the PVSCs employing dopant-free PDT-T and PDTT-T over the reference devices confirm the significance of precise molecular design on fused-ring polymeric HTMs for the long-life PVSCs.

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Charge-carrier-mobility-dependent-open-circuit-voltage-in-organic-and-hybrid-solar-cells

Cited by 11 publications

References 17 publications

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

Systematic Investigation of the Optoelectronic Properties of GaAs Nanowire and Nanocone Solar Cells: Effect of Geometrical Nonuniformities, Angle of Incidence, and Structural and Electronic Parameters

Donor–Acceptor Type Polymers Containing Fused-Ring Units as Dopant-Free, Hole-Transporting Materials for High-Performance Perovskite Solar Cells

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