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Carrier separation and transport in perovskite solar cells studied by nanometre-scale profiling of electrical potential

Author

Listed:
  • Chun-Sheng Jiang

    (National Renewable Energy Laboratory (NREL))

  • Mengjin Yang

    (National Renewable Energy Laboratory (NREL))

  • Yuanyuan Zhou

    (School of Engineering, Brown University)

  • Bobby To

    (National Renewable Energy Laboratory (NREL))

  • Sanjini U. Nanayakkara

    (National Renewable Energy Laboratory (NREL))

  • Joseph M. Luther

    (National Renewable Energy Laboratory (NREL))

  • Weilie Zhou

    (Advanced Materials Research Institute, University of New Orleans)

  • Joseph J. Berry

    (National Renewable Energy Laboratory (NREL))

  • Jao van de Lagemaat

    (National Renewable Energy Laboratory (NREL))

  • Nitin P. Padture

    (School of Engineering, Brown University)

  • Kai Zhu

    (National Renewable Energy Laboratory (NREL))

  • Mowafak M. Al-Jassim

    (National Renewable Energy Laboratory (NREL))

Abstract

Organometal–halide perovskite solar cells have greatly improved in just a few years to a power conversion efficiency exceeding 20%. This technology shows unprecedented promise for terawatt-scale deployment of solar energy because of its low-cost, solution-based processing and earth-abundant materials. We have studied charge separation and transport in perovskite solar cells—which are the fundamental mechanisms of device operation and critical factors for power output—by determining the junction structure across the device using the nanoelectrical characterization technique of Kelvin probe force microscopy. The distribution of electrical potential across both planar and porous devices demonstrates p–n junction structure at the TiO2/perovskite interfaces and minority-carrier diffusion/drift operation of the devices, rather than the operation mechanism of either an excitonic cell or a p-i-n structure. Combining the potential profiling results with solar cell performance parameters measured on optimized and thickened devices, we find that carrier mobility is a main factor that needs to be improved for further gains in efficiency of the perovskite solar cells.

Suggested Citation

  • Chun-Sheng Jiang & Mengjin Yang & Yuanyuan Zhou & Bobby To & Sanjini U. Nanayakkara & Joseph M. Luther & Weilie Zhou & Joseph J. Berry & Jao van de Lagemaat & Nitin P. Padture & Kai Zhu & Mowafak M. A, 2015. "Carrier separation and transport in perovskite solar cells studied by nanometre-scale profiling of electrical potential," Nature Communications, Nature, vol. 6(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9397
    DOI: 10.1038/ncomms9397
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    Cited by:

    1. Fangfang Wang & Mubai Li & Qiushuang Tian & Riming Sun & Hongzhuang Ma & Hongze Wang & Jingxi Chang & Zihao Li & Haoyu Chen & Jiupeng Cao & Aifei Wang & Jingjin Dong & You Liu & Jinzheng Zhao & Ying C, 2023. "Monolithically-grained perovskite solar cell with Mortise-Tenon structure for charge extraction balance," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Mesquita, Isabel & Andrade, Luísa & Mendes, Adélio, 2018. "Perovskite solar cells: Materials, configurations and stability," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 2471-2489.

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