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Effects of local compositional heterogeneity in mixed halide perovskites on blue electroluminescence

Luo, Xiyu ; Xu, Weidong ; Zheng, Guanhaojie ; Tammireddy, Sandhya ; Wei, Qi ; Karlsson, Max ; Zhang, Zhaojun LU ; Ji, Kangyu ; Kahmann, Simon and Yin, Chunyang , et al. (2024) In Matter 7(3). p.1054-1070
Abstract

Compositional heterogeneity is commonly observed in mixed bromide/iodide perovskite photoabsorbers, typically with minimal effects on charge carrier recombination and photovoltaic performance. Consistently, it has so far received very limited attention in bromide/chloride-mixed perovskites, which hold particular significance for blue light-emitting diodes. Here, we uncover that even a minor degree of localized halide heterogeneity leads to severe non-radiative losses in mixed bromide/chloride blue perovskite emitters, presenting a stark contrast to general observations in photovoltaics. We not only provide a visualization of the heterogeneity landscape spanning from micro-to sub-microscale but also identify that this issue mainly arises... (More)

Compositional heterogeneity is commonly observed in mixed bromide/iodide perovskite photoabsorbers, typically with minimal effects on charge carrier recombination and photovoltaic performance. Consistently, it has so far received very limited attention in bromide/chloride-mixed perovskites, which hold particular significance for blue light-emitting diodes. Here, we uncover that even a minor degree of localized halide heterogeneity leads to severe non-radiative losses in mixed bromide/chloride blue perovskite emitters, presenting a stark contrast to general observations in photovoltaics. We not only provide a visualization of the heterogeneity landscape spanning from micro-to sub-microscale but also identify that this issue mainly arises from the initially formed chloride-rich clusters during perovskite nucleation. Our work sheds light on a long-term neglected factor impeding the advancement of blue light-emitting diodes using mixed halide perovskites and provides a practical strategy to mitigate this issue.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
blue perovskite light-emitting diodes, local compositional heterogeneity, MAP 3: Understanding, mixed halide perovskites
in
Matter
volume
7
issue
3
pages
17 pages
publisher
Cell Press
external identifiers
  • scopus:85186084251
ISSN
2590-2393
DOI
10.1016/j.matt.2023.12.019
language
English
LU publication?
yes
id
f77628ef-586b-447e-aafd-ac0bfd1cfbc3
date added to LUP
2024-03-14 10:45:44
date last changed
2024-03-18 08:05:26
@article{f77628ef-586b-447e-aafd-ac0bfd1cfbc3,
  abstract     = {{<p>Compositional heterogeneity is commonly observed in mixed bromide/iodide perovskite photoabsorbers, typically with minimal effects on charge carrier recombination and photovoltaic performance. Consistently, it has so far received very limited attention in bromide/chloride-mixed perovskites, which hold particular significance for blue light-emitting diodes. Here, we uncover that even a minor degree of localized halide heterogeneity leads to severe non-radiative losses in mixed bromide/chloride blue perovskite emitters, presenting a stark contrast to general observations in photovoltaics. We not only provide a visualization of the heterogeneity landscape spanning from micro-to sub-microscale but also identify that this issue mainly arises from the initially formed chloride-rich clusters during perovskite nucleation. Our work sheds light on a long-term neglected factor impeding the advancement of blue light-emitting diodes using mixed halide perovskites and provides a practical strategy to mitigate this issue.</p>}},
  author       = {{Luo, Xiyu and Xu, Weidong and Zheng, Guanhaojie and Tammireddy, Sandhya and Wei, Qi and Karlsson, Max and Zhang, Zhaojun and Ji, Kangyu and Kahmann, Simon and Yin, Chunyang and Zou, Yatao and Zhang, Zeyu and Chen, Huaiyu and Marçal, Lucas A.B. and Zhao, Haifeng and Ma, Dongxin and Zhang, Dongdong and Lu, Yue and Li, Mingjie and Deibel, Carsten and Stranks, Samuel D. and Duan, Lian and Wallentin, Jesper and Huang, Wei and Gao, Feng}},
  issn         = {{2590-2393}},
  keywords     = {{blue perovskite light-emitting diodes; local compositional heterogeneity; MAP 3: Understanding; mixed halide perovskites}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1054--1070}},
  publisher    = {{Cell Press}},
  series       = {{Matter}},
  title        = {{Effects of local compositional heterogeneity in mixed halide perovskites on blue electroluminescence}},
  url          = {{http://dx.doi.org/10.1016/j.matt.2023.12.019}},
  doi          = {{10.1016/j.matt.2023.12.019}},
  volume       = {{7}},
  year         = {{2024}},
}