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Polymer-Assisted Controllable Growth of Large-Scale and High-Quality Two-Dimensional Perovskite Single-Crystal
Hu Zhang1, Zong-Yu Yu1, Lei Qu1
1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
ACS Nano
|June 9, 2026
Summary
A new polyvinylpyrrolidone (PVP)-assisted method enables controlled growth of large-scale, high-quality 2D perovskite single-crystal (PSC) arrays for advanced optoelectronic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Two-dimensional (2D) hybrid perovskites offer exceptional optoelectronic properties.
- Scalable, high-quality growth of 2D perovskite single-crystal (PSC) arrays is crucial for integrated devices but remains challenging.
Purpose of the Study:
- To develop an efficient method for controllable growth of large-scale, patterned 2D PSC microplate arrays.
- To enable tunable growth of various 2D perovskite phases with controlled dimensions.
Main Methods:
- A polyvinylpyrrolidone (PVP)-assisted template-space-confined method was employed.
- Coordination-bonding interactions between PVP and perovskite precursors facilitated uniform growth.
- Controlled synthesis of (PEA)2PbI4 PSC microplate arrays with optimized PVP concentration (4 wt %).
Main Results:
- Achieved patterned 2D PSC microplate arrays in various Ruddlesden-Popper (RP) and Dion-Jacobson (DJ) phases.
- Demonstrated uniform growth over 100 mm2 areas with tunable lateral size and thickness.
- Synthesized high-quality (PEA)2PbI4 PSC microplate arrays exhibiting low defect density.
Conclusions:
- The PVP-assisted method enables scalable, controlled growth of high-quality 2D PSC microplate arrays.
- The resulting arrays are suitable for fabricating high-performance photodetector arrays with low device variation.
- This advancement is significant for large-scale, integrated optoelectronic systems.
