4.8 Article

Bio-Inspired Pangolin Design for Self-Healable Flexible Perovskite Light-Emitting Diodes

Journal

ACS NANO
Volume 16, Issue 11, Pages 17973-17981

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.2c06118

Keywords

flexible perovskite light-emitting diodes; bio-inspired structure; sky-blue emission; bendable; self-healable

Funding

  1. National Key R&D Program of China [2022YFE0108900]
  2. Science and Technology Development Fund (FDCT), Macau SAR [0018/2022/A1]
  3. National Natural Science Foundation of China [62274117, 62075061, 12075303, 51873138]
  4. Science and Technology Commission of Shanghai Municipality [22520760600]
  5. Natural Science Foundation of Zhejiang Province [LGG22F010001]
  6. Jiangsu Provincial department of Science and Technology [BZ2022054]
  7. Collaborative Innovation Center of Suzhou Nano Science Technology

Ask authors/readers for more resources

Inspired by pangolins, researchers propose a bionic structure design for self-healing flexible perovskite light-emitting diodes (PeLEDs). By employing a polymer-assisted crystal regulation method with a soft elastomer, the performance of the PeLEDs is significantly enhanced, achieving record external quantum efficiency and high resistance to flexural strain.
Despite tremendous developments in the luminescene performance of perovskite light-emitting diodes (PeLEDs), the brittle nature of perovskite crystals and their poor crystallinity on flexible substrates inevitably lead to inferior performance. Inspired by pangolins' combination of rigid scales and soft flesh, we propose a bionic structure design for self-healing flexible PeLEDs by employing a polymer assisted crystal regulation method with a soft elastomer of diphenylmethane diisocyanate polyurethane (MDI-PU). The crystallinity and flexural strain resistance of such perovskite films on plastics with silver-nanowire-based flexible transparent electrodes are highly enhanced. The detrimental cracks induced during repeated deformation can be effectively self-healed under heat treatment via intramolecular/intermolecular hydrogen bonds with MDI-PU. Upon collective optimization of the perovskite films and device architecture, the blue-emitting flexible PeLEDs can achieve a record external quantum efficiency of 13.5% and high resistance to flexural strain, which retain 87.8 and 80.7% of their initial efficiency after repeated bending and twisting operations of 2000 cycles, respectively.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available