Lateral Phase Heterojunction for Perovskite Microoptoelectronics

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - (2024) vom: 05. Nov., Seite e2409201
1. Verfasser:	Li, Lei (VerfasserIn)
Weitere Verfasser:	Yan, Haoming, Li, Shunde, Xu, Hongyu, Qu, Duo, Hu, An, Ma, Li, Ji, Yongqiang, Zhong, Qixuan, Zhao, Lichen, Xu, Fan, Tu, Yongguang, Song, Tinglu, Wu, Jiang, Li, Menglin, Lu, Changjun, Yang, Xiaoyu, Zhong, Haizheng, Gong, Qihuang, Wang, Xinqiang, Zhu, Rui
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article contact diffusion lithography lateral phase heterojunction micro‐optoelectronics perovskite light‐emitting diode

Beschreibung
Zusammenfassung:	© 2024 Wiley‐VCH GmbH. 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
Beschreibung:	Date Revised 05.11.2024 published: Print-Electronic Citation Status Publisher
ISSN:	1521-4095
DOI:	10.1002/adma.202409201