Reduction in surface recombination through hydrogen and 1-heptene passivated silicon nanocrystals film on silicon solar cells

Rajesh, Ch.; Pramod, M. R.; Patil, S. I.; Mahamuni, Shailaja; More, Shahaji; Dusane, Rajiv O.; Ghaisas, S. V.

doi:10.1016/j.solener.2011.10.033

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…The recombination lifetime of the samples was measured by using quasi‐steady‐state‐photo‐conductance (QSSPC), which was developed by Sinton Instruments (WCT 120) …”

Section: Methodsmentioning

confidence: 99%

“…Many research groups are trying to passivate the surface of such solar cells, which is one way to address this issue. By coating semiconducting/dielectric interfaces like MT or CMT, the recombination of electron‐hole pairs can be greatly reduced (surface passivation) resulting in significant increase in solar cell efficiency, which is the aim of the present work.…”

Section: Introductionmentioning

confidence: 99%

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Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂

Ravuvari

Yechuri²,

Chaitanya³

et al. 2018

Solar RRL

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In the present work, an improvement in light‐conversion efficiency by coating spherical particles of mesoporous TiO2 (MT) and copper‐modified mesoporous TiO2 (CMT) on single‐crystalline Si solar PV cell is observed. The studies are carried out by spin coating with different concentrations of MT (0.25 to 1.5%) and CMT (0.25 to 1.0%) particles on bare cells independently and compared with a bare solar cell throughout the work. It is observed that in the case of MT coatings, the conversion efficiency increases initially and reaches a maximum of 9.77% at a coating concentration of 1.0%; thereafter, it decreases with an increase in coating concentration. This decrease in efficiency may be attributed to coagulation of MT particles, whereas in the case of CMT particles the conversion efficiency reached a maximum of 8.85% at 0.5% concentration and decreases thereafter. This study indicates that a higher efficiency can be achieved at lower concentrations of CMT coating compared to MT coatings on a bare solar cell. The increase in efficiency may be attributed to better surface passivation and/or trapping of electrons at the metal sites by Cu in CMT. Recombination lifetime measurements results corroborated that CMT particles show better surface passivation as a result of which there is an increase in efficiency. Diffused reflectance and short‐circuit current ratio versus wavelength studies on MT and CMT also revealed that CMT particles perform better than MT particles.

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“…The recombination lifetime of the samples was measured by using quasi‐steady‐state‐photo‐conductance (QSSPC), which was developed by Sinton Instruments (WCT 120) …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂

Ravuvari

Yechuri²,

Chaitanya³

et al. 2018

Solar RRL

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“…Silicon wafer were ultrasonically cleaned in acetone, and immersed in hydrofluoric acid (HF) solution (49% v/v Sigma Aldrich) for three seconds to remove native oxide layer. Removal of anti-reflection coating of crystalline silicon solar cell was also done with same HF as reported elsewhere (Patil et al, 2013b;Rajesh et al, 2012). The Oleylamine (OLA) was purchased from Sigma Aldrich (Tech.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore the understating of passivation mechanism of n-emitter in presence of shallow p-n junction of solar cell is to be treated separately in contrast with the passivation mechanism of silicon wafer. A continued investigation of the surface coatings and nanoparticles interaction with the n-type emitter surface led to various coatings which showed varying efficiency toward passivation (Rajesh et al, 2012;Patil et al, 2013a) following, we show passivation results of organic Oleylamine (OLA) layer on n-emitter surface of solar cell. Application of OLA layer on the bare n-type emitter surface leads to a passivation comparable with SiO 2 or SiNx coatings on the commercial solar cells.…”

Section: Introductionmentioning

confidence: 93%

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Construing the interaction between solar cell surface and fatty amine for the room temperature passivation

et al. 2016

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Passivation of n‐type emitter and p‐type base in solar cells via oxygen terminated silicon nanoparticles

Patil

Rajesh

Pramod

et al. 2013

Progress in Photovoltaics

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Various measurements and experiments are performed to establish the mechanism of passivation on emitter and base of conventionally manufactured solar cell with p-type base. The surface coatings on the emitter are removed. The bare surface is then coated with silicon (Si) nanoparticles (NPs) with oxygen termination. It shows an increase in the cell efficiency up to 14% over bare surface of solar cell. The NPs show enhancement in light scattering from the surface, but shows an increase in the recombination lifetime indicating an improved passivation. When back contact is partially removed, the coating on bare back side ( p-type) of the solar cell also improves the cell efficiency. This is also attributable to the increased recombination lifetime from the measurements. Same NPs are seen to degrade the surface of n and p-type Si wafers. This apparently contradictory behaviour is explained by studying and comparing the emitter (n-type) surface of the solar cell with that of n-type Si wafer and the back surface ( p-type) with that of p-type Si wafer. The emitter surface is distinctly different from the n-type wafer because of the shallow p-n junction causing the surface depletion. Back surface has aluminium (Al) metal trace, which plays an important role in forming complexes with the oxygen-terminated Si NPs (Si-O NPs). With these studies, it is observed that increase in the efficiency can potentially reduce the thermal budget in solar cell preparation.

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Reduction in surface recombination through hydrogen and 1-heptene passivated silicon nanocrystals film on silicon solar cells

Cited by 13 publications

References 17 publications

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂

Construing the interaction between solar cell surface and fatty amine for the room temperature passivation

Passivation of n‐type emitter and p‐type base in solar cells via oxygen terminated silicon nanoparticles

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Reduction in surface recombination through hydrogen and 1-heptene passivated silicon nanocrystals film on silicon solar cells

Cited by 13 publications

References 17 publications

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO2 and Cu‐Modified Mesoporous TiO2

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO2 and Cu‐Modified Mesoporous TiO2

Construing the interaction between solar cell surface and fatty amine for the room temperature passivation

Passivation of n‐type emitter and p‐type base in solar cells via oxygen terminated silicon nanoparticles

Contact Info

Product

Resources

About

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂

Improved Light Efficiency in Si Solar Cells by Coating Mesoporous TiO₂ and Cu‐Modified Mesoporous TiO₂