TY - JOUR
T1 - In situ recombination junction between p-Si and TiO2 enables high-efficiency monolithic perovskite/Si tandem cells
AU - Shen, Heping
AU - Omelchenko, Stefan T.
AU - Jacobs, Daniel A.
AU - Yalamanchili, Sisir
AU - Wan, Yimao
AU - Yan, Di
AU - Phang, Pheng
AU - Duong, The
AU - Wu, Yiliang
AU - Yin, Yanting
AU - Samundsett, Christian
AU - Peng, Jun
AU - Wu, Nandi
AU - White, Thomas P.
AU - Andersson, Gunther G.
AU - Lewis, Nathan S.
AU - Catchpole, Kylie R.
N1 - Funding Information:
We would like to thank S. Surve for the mask fabrication and D. Sheng for the STEM results discussion. We greatly appreciate T. Lu and Y. Liu for help with the AFM measurement, D. Walter and T. Kho for discussion about the passivation of Si solar cells, P. Zhang, Y. Zhang, and L. Wang for coordination of the EQE measurement, W. Liang for optimization of the texturing process, and H. T. Nguyen for optical analysis. The electron spectroscopy apparatus was built with a grant from the Australian Research Council (LE0989068). We acknowledge the equipment and support provided by the Australian
PY - 2018/12/14
Y1 - 2018/12/14
N2 - Increasing the power conversion efficiency of silicon (Si) photovoltaics is a key enabler for continued reductions in the cost of solar electricity. Here, we describe a two-terminal perovskite/Si tandem design that increases the Si cell’s output in the simplest possible manner: by placing a perovskite cell directly on top of the Si bottom cell. The advantageous omission of a conventional interlayer eliminates both optical losses and processing steps and is enabled by the low contact resistivity attainable between n-type TiO2 and Si, established here using atomic layer deposition. We fabricated proof-of-concept perovskite/Si tandems on both homojunction and passivating contact heterojunction Si cells to demonstrate the broad applicability of the interlayer-free concept. Stabilized efficiencies of 22.9 and 24.1% were obtained for the homojunction and passivating contact heterojunction tandems, respectively, which could be readily improved by reducing optical losses elsewhere in the device. This work highlights the potential of emerging perovskite photovoltaics to enable low-cost, high-efficiency tandem devices through straightforward integration with commercially relevant Si solar cells.
AB - Increasing the power conversion efficiency of silicon (Si) photovoltaics is a key enabler for continued reductions in the cost of solar electricity. Here, we describe a two-terminal perovskite/Si tandem design that increases the Si cell’s output in the simplest possible manner: by placing a perovskite cell directly on top of the Si bottom cell. The advantageous omission of a conventional interlayer eliminates both optical losses and processing steps and is enabled by the low contact resistivity attainable between n-type TiO2 and Si, established here using atomic layer deposition. We fabricated proof-of-concept perovskite/Si tandems on both homojunction and passivating contact heterojunction Si cells to demonstrate the broad applicability of the interlayer-free concept. Stabilized efficiencies of 22.9 and 24.1% were obtained for the homojunction and passivating contact heterojunction tandems, respectively, which could be readily improved by reducing optical losses elsewhere in the device. This work highlights the potential of emerging perovskite photovoltaics to enable low-cost, high-efficiency tandem devices through straightforward integration with commercially relevant Si solar cells.
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U2 - 10.1126/sciadv.aau9711
DO - 10.1126/sciadv.aau9711
M3 - Article
C2 - 30555921
AN - SCOPUS:85058753637
VL - 4
JO - Science advances
JF - Science advances
SN - 2375-2548
IS - 12
M1 - eaau9711
ER -