Enhanced photovoltaic performance of meso-porous SnO<sub>2</sub> based solar cells utilizing 2D MgO nanosheets sensitized by a metal-free carbazole derivative

Qureshi, Mohammad; Ansari, Mohammad Shaad; Soni, Saurabh S.

doi:10.1039/c4ta05877a

Cited by 37 publications

(24 citation statements)

References 39 publications

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“…The wide range of work functions in TMO enables them for using as an antireflection coating (ARC) on photovoltaic devices to improve photon to electron conversion (PEC) efficiency [4]. The ARCs are characterized by broad bandgap along with wide optical transmission ranging from700 to 1000 nm, and surface roughness [5]. Hence, ARC's developed in nanometer thickness can enhance the PEC efficiency of solar cells by increasing light trapping in the active region [6].…”

Section: Introductionmentioning

confidence: 99%

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Sagar

Rao²

2020

Mater. Res. Express

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Herein, we report the study on RF-sputtered transition metal oxide thin films of Zinc oxide, Magnesium oxide, and Aluminum oxide as an antireflection coating on silicon-based solar cells and their influence on energy conversion. The transmission spectrum of all sputtered metal oxides was studied using a UV-visible spectrophotometer. The phase formation and microstructure analysis of these sputtered oxides were studied using glass for the destructive test along with the device. The x-ray diffraction and cross-section scanning electron microscopy of sputtered glass confirmed a singlephase structure along with nearly equal desired deposition thickness. The thicknesses of sputtered films were estimated using variable angle ellipsometry and the same was confirmed from cross-section scanning electron micrograph. The chemical composition and oxidation state of thin films deposited on glass were established from x-ray photoemission spectroscopy. The ability of a fabricated device deposited with the antireflection layer in converting photon energy to electrical energy was studied using a solar simulator under 1 sun condition. The ability to collect charge carriers of the antireflection coated device as a function of wavelength was also studied using quantum efficiency measurement.

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Section: Introductionmentioning

confidence: 99%

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Sagar

Rao²

2020

Mater. Res. Express

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“…From the Bode phase plot, the values of τ e (photoinduced electron lifetime) are evaluated using the following relation, τ e = 1/(2π f p ), where f p is the observed maximum peak frequency in the mid-frequency region. 25 It has been found that the τ e values for different photoanodes are 3.9, 5.1, 10.9, and 12.6 ms for SnO 2 nanoparticle, SZ 10 , SZ 20 , and SZ 30 devices. The gradual increase in the photoinduced electron lifetime for the composite-based devices as compared to that for pristine SnO 2 photoanode-based device with an increase in the meso-ZnO HS content also validates the interference created by addition of meso-ZnO HS, acting as a partial barrier for photoinduced electrons to undergo recombination at the semiconductor/dye/electrolyte interface.…”

Section: Results and Discussionmentioning

confidence: 95%

“…20 “Bare SnO 2 -nanoparticle (NP)-based devices made from SnO 2 nanoparticles only (size ∼20 nm) with the mostly used Ru-based N719 dye rarely show power conversion efficiencies more than PCE ∼2%”. 21−23 A very convenient strategy to overcome the adverse issues in the case of SnO 2 -based photoanode is to make composite photoanodic architectures with other wide-band-gap metal oxides such as TiO 2 , 24 MgO, 25 and ZnO. 26−29 It has been seen that in the case of SnO 2 -based devices the composite photoanode architecture has shown substantial improvement in device performances, resulting from a reduced reverse tunneling probability of photogenerated electrons.…”

Section: Introductionmentioning

confidence: 99%

Efficient Energy Harvesting in SnO₂-Based Dye-Sensitized Solar Cells Utilizing Nano-Amassed Mesoporous Zinc Oxide Hollow Microspheres as Synergy Boosters

2018

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Finding the material characteristics satisfying most of the photovoltaic conditions is difficult. In contrast, utilization of foreign materials that can contribute to light harvesting and charge transfers in the devices is now desirable/thought-provoking. Herein, a binary hybrid photoanode utilizing nano-amassed micron-sized mesoporous zinc oxide hollow spheres (meso-ZnO HS) in conjunction with SnO 2 nanoparticles (NPs), i.e., SnO 2 NP_ZnO HS (for an optimized weight ratio (8:2)), displayed a nearly ∼4-fold increase in the efficiency (η) compared to that of bare SnO 2 nanoparticle device. Enhanced device efficacy in the composite photoanode-based device can be accredited to the dual function of nano-amassed meso-ZnO HS. Nano-amassed micron-sized ZnO HS embedded in the photoanode can increase the light-harnessing capability without sacrificing the surface area as well as optical confinement of light by multiple reflections within its cavity and enhanced light-scattering effects. Electrochemical impedance spectroscopy analysis revealed an extended lifetime of electron (τ e ) and a higher value of R ct2 at the working electrode/dye/redox mediator interface, indicating a minimum photoinduced electron interception. The open-circuit voltage decay reveals a slower recombination kinetics of photogenerated electrons, supporting our claim that the nano-ammased meso-ZnO HS can serve as an energy barrier to the photoinjected electrons to retard the back-transfer to the electrolyte. Moreover, the improvement in the fill factors of the composite-based devices is endorsed to the facile penetration of the electrolyte through the pores of nano-amassed meso-ZnO HS, which increases the regeneration probability of oxidized dyes.

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“…[ 41 ] SnO 2 was first applied as an ETL in dye‐sensitized solar cells and then became popular for utilization in PSCs. [ 42 ] The high transmittance of SnO 2 enables PSCs to achieve higher performance within the visible region of the solar radiation spectrum. [ 43 ] In addition, the wide bandgap and well‐matched energy band alignment contribute to a strong hole‐blocking effect and rapid charge extraction at the interface.…”

Section: Introductionmentioning

confidence: 99%

[(C₈H₁₇)₄N]₄[SiW₁₂O₄₀] (TASiW‐12)‐Modified SnO₂ Electron Transport Layer for Efficient and Stable Perovskite Solar Cells

Shi

Zhang

Guo³

et al. 2020

Solar RRL

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Recently, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has been developed to exceed 25%, and charge transport layer optimization is a promising strategy for further efficiency improvement in PSCs. Herein, a supramolecular complex [(C8H17)4N]4[SiW12O40] (TASiW‐12) is synthesized and its doped form in SnO2 (hereafter S‐SnO2) is used as a charge transport layer (electron transport layer, ETL). This study demonstrates that S‐SnO2 introduction is a practical and effective way to improve the bulk ETL and those of the ETL/perovskite interface. S‐SnO2 leads to improved band alignment, suppressed trap‐assisted charge recombination, and enhanced electron mobility. In addition, an enhanced open‐circuit voltage (Voc) of 1.16 V and an efficiency of 22.8% are successfully achieved in n–i–p planar PSCs. Meanwhile, S‐SnO2 acts as a crucial agent to reduce charge accumulation at the S‐SnO2/perovskite interface. The device possesses superior stability for 3072 h with only a 5.65% loss of the initial PCE. These results indicate that high‐efficiency PSCs can be easily attained by introducing a TASiW‐12‐doped ETL with integrated functions.

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Enhanced photovoltaic performance of meso-porous SnO₂ based solar cells utilizing 2D MgO nanosheets sensitized by a metal-free carbazole derivative

Abstract: Herein, we report a power conversion efficiency of 3.71% using mesoporous SnO2 in combination with 2D MgO nanosheets, sensitized by a metal free carbazole dye.

Cited by 37 publications

References 39 publications

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Efficient Energy Harvesting in SnO₂-Based Dye-Sensitized Solar Cells Utilizing Nano-Amassed Mesoporous Zinc Oxide Hollow Microspheres as Synergy Boosters

[(C₈H₁₇)₄N]₄[SiW₁₂O₄₀] (TASiW‐12)‐Modified SnO₂ Electron Transport Layer for Efficient and Stable Perovskite Solar Cells

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Enhanced photovoltaic performance of meso-porous SnO2 based solar cells utilizing 2D MgO nanosheets sensitized by a metal-free carbazole derivative

Abstract: Herein, we report a power conversion efficiency of 3.71% using mesoporous SnO2 in combination with 2D MgO nanosheets, sensitized by a metal free carbazole dye.

Cited by 37 publications

References 39 publications

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Increasing the silicon solar cell efficiency with transition metal oxide nano-thin films as anti-reflection coatings

Efficient Energy Harvesting in SnO2-Based Dye-Sensitized Solar Cells Utilizing Nano-Amassed Mesoporous Zinc Oxide Hollow Microspheres as Synergy Boosters

[(C8H17)4N]4[SiW12O40] (TASiW‐12)‐Modified SnO2 Electron Transport Layer for Efficient and Stable Perovskite Solar Cells

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Enhanced photovoltaic performance of meso-porous SnO₂ based solar cells utilizing 2D MgO nanosheets sensitized by a metal-free carbazole derivative

Efficient Energy Harvesting in SnO₂-Based Dye-Sensitized Solar Cells Utilizing Nano-Amassed Mesoporous Zinc Oxide Hollow Microspheres as Synergy Boosters

[(C₈H₁₇)₄N]₄[SiW₁₂O₄₀] (TASiW‐12)‐Modified SnO₂ Electron Transport Layer for Efficient and Stable Perovskite Solar Cells