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Research Article | Open Access

In-situ growth of titanium alkoxide network encapsulated perovskite nanograin for robust light emission

Si Peng1,§, Yunlong Liu1,§, Ying Liu1,§, Hao Wang1,2,3, Mingyu Ma1, Wenjia Zhou1,4, Ruiqi Xu1, Xianyuan Jiang1, Danni Yu1, Wei Zhou1, Yingbo Zhao1,5( ), Zhijun Ning1,5,6( )
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai 201210, China
State Key Laboratory of Advanced Medical Materials and Devices, ShanghaiTech University, Shanghai 201210, China

§ Si Peng, Yunlong Liu, and Ying Liu contributed equally to this work.

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Abstract

The construction of a thin stable shell to encapsulate perovskite with effective carrier transport is a promising strategy to fabricate highly efficient and stable perovskite based optoelectronic devices. However, it is generally difficult to control the thickness and location of the encapsulating materials, ideally on perovskite grains. In this work, we developed a one-step method for the growth of titanium alkoxide networks in-situ in perovskite film forming an encapsulating layer on perovskite nanograin homogeneously. The thin encapsulating network brings much enhanced stability and allows effective carrier transport simultaneously. Light emitting diode based on this composite shows much enhanced stability under continuous operation.

Graphical Abstract

An in-situ method for the preparation of perovskite-titanium alkoxide network composite films is developed, in which perovskite nanograins are surrounded by titanium alkoxide network. The encapsulation layer enhanced activation energy for ion migration and the composite film shows much improved stability in different conditions. Light emitting device based on the film exhibits improved operation stability.

Keywords

perovskitelight-emitting diodesmetal organic frameworktitanium-oxo cluster

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Nano Research
Volume 18 Issue 4,
April 2025
Article number: 94907272
DOI: 10.26599/NR.2025.94907272

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Cite this article:
Peng S, Liu Y, Liu Y, et al. In-situ growth of titanium alkoxide network encapsulated perovskite nanograin for robust light emission. Nano Research, 2025, 18(4): 94907272. https://doi.org/10.26599/NR.2025.94907272
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Received: 29 November 2024
Revised: 22 January 2025
Accepted: 23 January 2025
Published: 01 April 2025
© The Author(s) 2025. Published by Tsinghua University Press.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/).