Lateral Phase Heterojunction for Perovskite Microoptoelectronics
Perovskite heterojunction engineering is the prerequisite but still a deficiency in the fabrication of micro-optoelectronic devices, where the present top-down or bottom-up techniques mainly focus on preparing the vertical heterojunction stacks. Perovskite lateral heterojunction structures generally rely on epitaxial growth, which cannot meet the demands of mass production of micro-devices. Here, a contact diffusion lithography technique is proposed to demonstrate a perovskite lateral phase heterojunction (LPH) polycrystalline film by ion-driven local phase transition. Under the guidance of thermodynamic simulations, methylamine contact and migration collectively promote in situ formation of α-phase formamidine-based perovskite patterns surrounded by δ-phase polymorphs. Spontaneous type-I heterojunction alignment between α- and δ-phases establishes energy funnels in the LPH film to facilitate carrier utilization and radiative recombination. The wide-bandgap δ-phase also serves as the coplanar isolator to achieve local anti-leakage for device integration. Based on the bright and stable LPH pattern layer, the near-infrared microscale perovskite light-emitting diode (micro-PeLED) with impressive device performance is achieved by following conventional device fabrication protocol. The proposed LPH enriches the perovskite heterojunction family, creates a new optoelectronic processing platform, and advances its versatile applications in micro-optoelectronics and photonics.
Authors
- An Hu (ORCID: https://orcid.org/0000-0002-3577-9881)
- Jiang Wu (ORCID: https://orcid.org/0000-0003-0546-5336)
- Qixuan Zhong (ORCID: https://orcid.org/0000-0001-5751-9565)
- Lichen Zhao (ORCID: https://orcid.org/0000-0003-2537-6963)
- Xinqiang Wang (ORCID: https://orcid.org/0000-0001-5514-8588)
- Yongguang Tu (ORCID: https://orcid.org/0000-0002-1402-4148)
- Haoming Yan (ORCID: https://orcid.org/0000-0002-5201-6368)
- Shunde Li (ORCID: https://orcid.org/0000-0002-6954-0035)
- Changjun Lu
- Duo Qu
- Qihuang Gong (ORCID: https://orcid.org/0000-0003-4974-6244)
- Fan Xu (ORCID: https://orcid.org/0000-0003-0833-1982)
- Tinglu Song (ORCID: https://orcid.org/0000-0003-3907-7956)
- Yongqiang Ji (ORCID: https://orcid.org/0000-0002-0848-9643)
- Lei Li
- Li Ma (ORCID: https://orcid.org/0000-0003-2198-9762)
- Rui Zhu (ORCID: https://orcid.org/0000-0001-7631-3589)
- Menglin Li (ORCID: https://orcid.org/0000-0002-8063-5764)
- Hongyu Xu (ORCID: https://orcid.org/0000-0002-5008-4615)
- Haizheng Zhong
- Xiaoyu Yang (ORCID: https://orcid.org/0000-0001-7788-4324)
Institutions
- Beijing Institute of Technology (CN)
- Northwestern Polytechnical University (CN)
- Shanxi University (CN)
- Peking University (CN)
- Collaborative Innovation Center of Quantum Matter (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-11-05
- DOI
- https://doi.org/10.1002/adma.202409201
- Citations
- 4
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.83
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Beijing Municipal Natural Science Foundation
- Beijing Nova Program
- National Key Research and Development Program of China