Authors
Qichun Gu, Tianjun Liu, Yucheng Xu, Xinjuan Li, Yunzhou Deng, Yang Lu, Youcheng Zhang, Zimu Wei, Xinyu Bai, Capucine Mamak, Yutong Han, Alessandro J Mirabelli, Weidong Xu, Jian Mao, Caterina Ducati, Henning Sirringhaus, Samuel D Stranks, Miguel Anaya
Published in
Science advances. Volume 12. Issue 35. Pages eaec7056. Aug 28, 2026. Epub Aug 28, 2026.
Abstract
Perovskite light-emitting diodes (PeLEDs) are promising low-cost, solution-processable, and color-pure optoelectronic devices for display and lighting applications. However, blue PeLEDs continue to lag their green and red counterparts in terms of luminance and operational lifetime, limiting their practical implementation. The performance disparity primarily arises from charge injection imbalance, which accelerates degradation at the perovskite/hole transport layer (HTL) interface under electrical bias. Here, we design a polymer blend HTL comprising poly(N-vinyl-2,7-difluoro-carbazole) (PVK-F) and poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) (PTAA), in which strengthened van der Waals interactions promote denser molecular packing. This optimized microstructure simultaneously enhances hole mobility and wettability, enabling high-quality perovskite film formation. Consequently, PeLEDs emitting at 485 nanometers achieve an external quantum efficiency of 24.1% and luminance exceeding 26,000 candela per square meter. Moreover, the improved hole injection mitigates interfacial degradation, yielding an operational half-lifetime exceeding 700 minutes at an initial luminance of 100 candela per square meter. This work establishes polymer blending as an effective strategy for advancing the performance and stability of blue PeLEDs.
PMID:
42664325
Bibliographic data and abstract were imported from PubMed on 29 Aug 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 12
- Comments 0