Sequential layer-by-layer deposition for high-performance fully thermal-evaporated red perovskite light-emitting diodes
Thermal-evaporated perovskite light-emitting diodes are highly promising for future display and lighting. However, multi-source co-evaporation faces challenges such as difficulty in regulating crystallinity, especially for red perovskite light-emitting diodes, whose external quantum efficiencies are still less than 2%. Here, we demonstrate a facile layer-by-layer thermal-evaporation strategy to fabricate high-quality perovskite-emitting films with tunable emission wavelengths. 5-Aminovaleric acid is introduced to regulate interfacial reactions during deposition, slow down crystallization during post-annealing, and passivate defects through coordination interactions. This approach yields perovskite emitting layers with high uniformity and luminance efficiency. As a result, red (670 nm) and deep-red (730 nm) perovskite light-emitting diodes achieve maximum external quantum efficiencies of 9% and 7.27%, and luminance of over 1500 cd m<sup>-2</sup> and 200 W s<sup>-1</sup> m<sup>-2</sup>, respectively. Furthermore, large-area (2500 mm²) and patterned perovskite thin films and light-emitting diodes with outstanding uniformity are successfully demonstrated.
Authors
- Bufan Yu (ORCID: https://orcid.org/0009-0001-6523-8568)
- Xiaoqin Ke (ORCID: https://orcid.org/0000-0002-7216-2987)
- Yutian Xu (ORCID: https://orcid.org/0000-0003-4293-3995)
- Qingxun Guo (ORCID: https://orcid.org/0000-0001-9747-2052)
- Zhelu Hu (ORCID: https://orcid.org/0009-0002-2232-4447)
- Yingdong Xia (ORCID: https://orcid.org/0000-0003-4023-3231)
- Lingfeng Chao (ORCID: https://orcid.org/0000-0001-5493-435X)
- Dongge Ma (ORCID: https://orcid.org/0000-0001-7779-6113)
- Jiangshan Chen (ORCID: https://orcid.org/0000-0002-0393-0057)
- Wei Huang (ORCID: https://orcid.org/0000-0001-7004-6408)
- Ziqiang Wang (ORCID: https://orcid.org/0000-0002-4676-3447)
- Junhao Liu (ORCID: https://orcid.org/0000-0002-3184-0470)
- Yonghua Chen (ORCID: https://orcid.org/0000-0002-9694-4246)
- Min Xue (ORCID: https://orcid.org/0000-0002-3135-9150)
- Na Meng (ORCID: https://orcid.org/0000-0002-5234-8872)
- Yuanhao Cui (ORCID: https://orcid.org/0000-0001-6323-8559)
- Yajing Li (ORCID: https://orcid.org/0009-0009-6885-0558)
- T.J. Pan
Institutions
- Nanjing Tech University (CN)
- Northwestern Polytechnical University (CN)
- South China University of Technology (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-07-26
- DOI
- https://doi.org/10.1038/s41467-025-62282-z
- Citations
- 10
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 7.30
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China