Picture: Tarbiat Modares College (TMU), Power Studies Artistic Commons License CC BY 4.0
Tarbiat Modares College (TMU) researchers in Iran have developed a perovskite photo voltaic cell utilizing a single-walled carbon nanotube (SWCNT) gap transport layer (HTL). This SWCNT, a twisted graphene sheet hole cylinder, enhances gap transport throughout the cell. The researchers surrounded the nanotube with lead sulfide colloidal quantum dots (PbS-CQDs).
“The talked about supplies can take up daylight properly and in flip improve absorption and carriers’ technology within the construction, thereby growing the ability conversion effectivity,” mentioned the researchers. “As well as, because the carriers’ lifetime in PbS-CQDs materials is near 2000 ns, this causes much less recombination of electrons and holes within the construction, which in flip results in the rise of open-circuit voltage within the system.”
The researchers constructed the cell utilizing a carbon contact, with the SWCNT serving as the outlet transport layer (HTL). The cell’s construction consists of an absorber utilizing MAPbI3 perovskite materials, a titanium dioxide (TiO2) electron switch layer (ETL), and a high contact composed of indium tin oxide (ITO).
“After discovering the optimum size of SWCNT and HTL top, we begin to sweep the center-to-center distance (CCD) between nanotubes of adjoining unit cells from 5 nm to 30 nm,” the researchers mentioned. “The band hole of the chosen SWCNT with the talked about traits is the same as 1.3 eV.”
The analysis staff decided that the optimum cell configuration and efficiency resulted from PbS-CQDs absolutely surrounding the SWCNT, with the HTL top set at 800 nm.
This last cell design, supported by simulations, achieved a 19.98% energy conversion effectivity, an open-circuit voltage of 0.94 V, a short-circuit present density of 24.45 mA/cm², and an 86% fill issue, addressing perovskite stability issues for potential trade use.
The research, “Single-walled carbon nanotube as gap transport layer in perovskite photo voltaic cell: Effectivity enhancement,” was not too long ago printed in Power Studies.
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