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Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

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Spatial Crystallization Homogenization Boosts Scalable Perovskite Light-Emitting Diodes.

Yu Xia¹, Jia-Cheng Li¹, Zhipeng Zhang^2,3

¹State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|August 1, 2025

Summary

A new microdroplet antisolvent deposition technique enables controlled crystallization for perovskite films. This method significantly improves external quantum efficiency (EQE) in perovskite light-emitting diodes (PeLEDs), paving the way for scalable manufacturing.

Keywords:

large‐area fabrication light‐emitting diodes perovskites spatial crystallization homogeneity

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Last Updated: Sep 13, 2025

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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

Area of Science:

Materials Science
Optoelectronics
Chemical Engineering

Background:

Conventional antisolvent dripping methods for perovskite films suffer from poor control over crystallization kinetics.
This leads to issues like instantaneous nucleation and spatial inhomogeneity, hindering scalability.

Purpose of the Study:

To develop a novel microdroplet-phase antisolvent deposition technique for enhanced perovskite film crystallization.
To improve the performance and scalability of perovskite light-emitting diodes (PeLEDs).

Main Methods:

A microdroplet-phase antisolvent deposition technique was developed.
This method utilizes delayed nucleation kinetics and uniform microdroplet diffusion for controlled crystallization.
The technique was applied to fabricate perovskite films for light-emitting diodes.

Main Results:

The developed technique achieved controlled crystallization with delayed nucleation and uniform diffusion.
Small-area (0.1 cm²) devices demonstrated a high external quantum efficiency (EQE) of 30.98% at 515 nm.
Larger-area (6.25 cm²) devices achieved a notable EQE of 23.21%.

Conclusions:

The microdroplet-phase antisolvent deposition technique offers superior control over perovskite crystallization.
This advancement is crucial for producing high-performance, large-area perovskite light-emitting diodes (PeLEDs).
The study presents a viable strategy for the industrial-scale production of PeLEDs.