Scientists at TU Delft have constructed a tandem perovskite-silicon photo voltaic cell with a brand new methodology of interface engineering. The gadget has an open-circuit voltage of 1.81 V, a short-circuit present of 18.1 mA/cm2, and a fill issue of 75.0%.
A analysis group led by Delft College of Know-how within the Netherlands developed a brand new photo voltaic cell for purposes in perovskite-silicon tandem PV gadgets.
“Our findings present the potential of utilizing (n)nc-SiOx:H and (n)nc-Si:H interfacial layers in tandem photo voltaic cells to cut back the reflection loss on the interfaces between the perovskite and silicon sub-cells,” mentioned Yifeng Zhao, the lead writer of the analysis. “By optimizing the interference results, these light-handling strategies will be utilized to completely different tandem buildings.”
The perovskite photo voltaic cell, with 19.1% effectivity, has an indium tin oxide (ITO) and glass substrate, a carbazole (2PACz) gap transport layer, a perovskite absorber, a buckminsterfullerene (C60) electron transport layer, a bathocuproine (BCP) buffer layer, and an aluminum (Al) metallic contact.
Within the tandem gadget, a nickel(II) oxide (NiOx) layer is used within the recombination junction to cut back electrical shunting. The presence of hydroxyl-rich NiOx facilitates the meeting of 2PACz, leading to lowered electrical shunt in floor cells. As well as, an anti-reflective coating based mostly on magnesium fluoride (MgF2) and the optimization of the C60 and SnOx layer thickness helped to cut back the reflection loss.
The champion photo voltaic cell achieved an influence conversion effectivity of 24.6%, an open-circuit voltage of 1.81 V, a short-circuit present of 18.1 mA/cm2, and a fill issue at 75.0%.
By utilizing (n)nc-Si:H and (n)nc-SiOx:H layers with a thickness of about 95 nm and 115 nm, respectively, the reflection decreases to 1.35 mA / cm2 and 1.51 mA / cm2 achieved on the intermediate interfaces between the perovskite and c-Si bottom-cells, which permits for higher mild coupling to the underside c-Si photo voltaic cells.
They offered the cell in “Optical Simulation-Aided Design and Engineering of Monolithic Perovskite/Silicon Tandem Photo voltaic Cells,” just lately printed in ACS Publications. The analysis group contains scientists from Eindhoven College of Know-how and the Netherlands Group for Utilized Scientific Analysis (TNO).
“This method will be tailored to completely different tandem designs to appreciate optimum mild administration in tandem gadgets,” the scientists concluded.
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