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@ARTICLE{Zhao:892610,
      author       = {Zhao, Yicheng and Zhang, Jiyun and Xu, Zhengwei and Sun,
                      Shijing and Langner, Stefan and Hartono, Noor Titan Putri
                      and Heumueller, Thomas and Hou, Yi and Elia, Jack and Li,
                      Ning and Matt, Gebhard J. and Du, Xiaoyan and Meng, Wei and
                      Osvet, Andres and Zhang, Kaicheng and Stubhan, Tobias and
                      Feng, Yexin and Hauch, Jens and Sargent, Edward H. and
                      Buonassisi, Tonio and Brabec, Christoph J.},
      title        = {{D}iscovery of temperature-induced stability reversal in
                      perovskites using high-throughput robotic learning},
      journal      = {Nature Communications},
      volume       = {12},
      number       = {1},
      issn         = {2041-1723},
      address      = {[London]},
      publisher    = {Nature Publishing Group UK},
      reportid     = {FZJ-2021-02199},
      pages        = {2191},
      year         = {2021},
      abstract     = {Stability of perovskite-based photovoltaics remains a topic
                      requiring further attention. Cation engineering influences
                      perovskite stability, with the present-day understanding of
                      the impact of cations based on accelerated ageing tests at
                      higher-than-operating temperatures (e.g. 140°C). By
                      coupling high-throughput experimentation with machine
                      learning, we discover a weak correlation between
                      high/low-temperature stability with a stability-reversal
                      behavior. At high ageing temperatures, increasing organic
                      cation (e.g. methylammonium) or decreasing inorganic cation
                      (e.g. cesium) in multi-cation perovskites has detrimental
                      impact on photo/thermal-stability; but below 100°C, the
                      impact is reversed. The underlying mechanism is revealed by
                      calculating the kinetic activation energy in perovskite
                      decomposition. We further identify that incorporating at
                      least 10 $mol.\%$ MA and up to 5 $mol.\%$ Cs/Rb to maximize
                      the device stability at device-operating temperature
                      (<100°C). We close by demonstrating the
                      methylammonium-containing perovskite solar cells showing
                      negligible efficiency loss compared to its initial
                      efficiency after 1800 hours of working under illumination at
                      30°C.},
      cin          = {IEK-11},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IEK-11-20140314},
      pnm          = {121 - Photovoltaik und Windenergie (POF4-121)},
      pid          = {G:(DE-HGF)POF4-121},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33850155},
      UT           = {WOS:000640638000003},
      doi          = {10.1038/s41467-021-22472-x},
      url          = {https://juser.fz-juelich.de/record/892610},
}