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Passivation ability of graphene oxide demonstrated by two-different-metal solar cells.

Hsu WT, Tsai ZS, Chen LC, Chen GY, Lin CC, Chen MH, Song JM, Lin CH - Nanoscale Res Lett (2014)

Bottom Line: The study on graphene oxide (GO) grows rapidly in recent years.Graphene oxide has been applied on Si two-different-metal solar cells.The simple chemical process to deposit graphene oxide makes low thermal budget, large-area deposition, and fast production of surface passivation possible.

View Article: PubMed Central - PubMed

Affiliation: Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, Taiwan, sugey0123@gmail.com.

ABSTRACT
The study on graphene oxide (GO) grows rapidly in recent years. We find that graphene oxide could act as the passivation material in photovoltaic applications. Graphene oxide has been applied on Si two-different-metal solar cells. The suitable introduction of graphene oxide could result in obvious enhancement on the efficiency. The simple chemical process to deposit graphene oxide makes low thermal budget, large-area deposition, and fast production of surface passivation possible. The different procedures to incorporate graphene oxide in Si two-different-metal solar cells are compared, and 21% enhancement on the efficiency is possible with a suitable deposition method.

No MeSH data available.


Related in: MedlinePlus

The transmittance of the glass with a GO film. The deposition condition of this GO film on glass is similar to that of SiGb1. The reference background in this FTIR measurement is air instead of glass to avoid the large fluctuation after dividing by background.
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Fig6: The transmittance of the glass with a GO film. The deposition condition of this GO film on glass is similar to that of SiGb1. The reference background in this FTIR measurement is air instead of glass to avoid the large fluctuation after dividing by background.

Mentions: In ref.[13], the light illumination from the rear surface results in a larger short-circuit current density (Jsc) than that from the top surface, which is due to the avoidance of electrode shading. However, the ISC of our control cell (ConSi) with rear illumination (Figure 5) is smaller than top illumination (Figure 2), since the rear side of our control cell is not coated by the 100-nm-thick oxide (performed in ref.[13]). Furthermore, the ISC of all GO samples is even smaller than that of ConSi. It is suspected that some of incident light is absorbed by GO. The transmittance spectrum of GO on glass has been measured by Fourier transform infrared spectroscopy (FTIR) (Figure 6). In Figure 6, with an incident wavelength of 550 nm, the transmittance of GO on glass is only 87%. The deposition of GO reduces the amount of light entering the Si, and hence the ISC of the GO samples is smaller than that of the control sample for the rear-side illumination case. Although ISC of SiGb1 and SiGb2 can not be superior than ConSi, VOC of both samples can still be superior than ConSi. The lower recombination contributed by GO corresponds to a smaller reverse current, which results in a larger VOC as mentioned above.Figure 5


Passivation ability of graphene oxide demonstrated by two-different-metal solar cells.

Hsu WT, Tsai ZS, Chen LC, Chen GY, Lin CC, Chen MH, Song JM, Lin CH - Nanoscale Res Lett (2014)

The transmittance of the glass with a GO film. The deposition condition of this GO film on glass is similar to that of SiGb1. The reference background in this FTIR measurement is air instead of glass to avoid the large fluctuation after dividing by background.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493844&req=5

Fig6: The transmittance of the glass with a GO film. The deposition condition of this GO film on glass is similar to that of SiGb1. The reference background in this FTIR measurement is air instead of glass to avoid the large fluctuation after dividing by background.
Mentions: In ref.[13], the light illumination from the rear surface results in a larger short-circuit current density (Jsc) than that from the top surface, which is due to the avoidance of electrode shading. However, the ISC of our control cell (ConSi) with rear illumination (Figure 5) is smaller than top illumination (Figure 2), since the rear side of our control cell is not coated by the 100-nm-thick oxide (performed in ref.[13]). Furthermore, the ISC of all GO samples is even smaller than that of ConSi. It is suspected that some of incident light is absorbed by GO. The transmittance spectrum of GO on glass has been measured by Fourier transform infrared spectroscopy (FTIR) (Figure 6). In Figure 6, with an incident wavelength of 550 nm, the transmittance of GO on glass is only 87%. The deposition of GO reduces the amount of light entering the Si, and hence the ISC of the GO samples is smaller than that of the control sample for the rear-side illumination case. Although ISC of SiGb1 and SiGb2 can not be superior than ConSi, VOC of both samples can still be superior than ConSi. The lower recombination contributed by GO corresponds to a smaller reverse current, which results in a larger VOC as mentioned above.Figure 5

Bottom Line: The study on graphene oxide (GO) grows rapidly in recent years.Graphene oxide has been applied on Si two-different-metal solar cells.The simple chemical process to deposit graphene oxide makes low thermal budget, large-area deposition, and fast production of surface passivation possible.

View Article: PubMed Central - PubMed

Affiliation: Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, Taiwan, sugey0123@gmail.com.

ABSTRACT
The study on graphene oxide (GO) grows rapidly in recent years. We find that graphene oxide could act as the passivation material in photovoltaic applications. Graphene oxide has been applied on Si two-different-metal solar cells. The suitable introduction of graphene oxide could result in obvious enhancement on the efficiency. The simple chemical process to deposit graphene oxide makes low thermal budget, large-area deposition, and fast production of surface passivation possible. The different procedures to incorporate graphene oxide in Si two-different-metal solar cells are compared, and 21% enhancement on the efficiency is possible with a suitable deposition method.

No MeSH data available.


Related in: MedlinePlus