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Flash Infrared Annealing for Perovskite Solar Cell Processing

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Published on: February 3, 2021

Crystallization Pathway Optimization and High-Index Facet Stabilization for Perovskite Photovoltaics.

Yili Wang^1,2, Keli Wang^1,3,4, Peng Gao³

¹Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, China.

Advanced Materials (Deerfield Beach, Fla.)

|June 10, 2026

Summary

This summary is machine-generated.

Researchers developed a new method for perovskite solar cells (PSCs) using cellulose 2,4,6-trichlorophenylcarbamate (3Cl-NC). This strategy enhances both power conversion efficiency (PCE) and operational stability in perovskite films.

Keywords:

biomass high‐miller‐index facets kinetically segmented crystallization perovskite solar cells

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Area of Science:

Materials Science
Renewable Energy
Solid-State Chemistry

Background:

Perovskite solar cells (PSCs) are promising for renewable energy but struggle with balancing power conversion efficiency (PCE) and operational stability.
Film crystallization kinetics and facet configuration are critical factors influencing PSC performance and longevity.

Purpose of the Study:

To develop a novel crystallization strategy for perovskite films that enhances both PCE and stability.
To investigate the role of macromolecular regulators in controlling perovskite crystallization and film morphology.

Main Methods:

A kinetically segmented crystallization strategy was employed using cellulose 2,4,6-trichlorophenylcarbamate (3Cl-NC) as a macromolecular regulator.
Multidentate coordination and thermally activated dynamic coordination were utilized to control precursor microenvironments and crystal growth.
Thermal annealing was performed to facilitate controlled crystal growth and phase formation.

Main Results:

The 3Cl-NC regulator promoted heterogeneous nucleation and controlled crystal growth, suppressing metastable δ-phase and favoring photoactive α-phase formation.
The (210) crystal orientation was thermodynamically stabilized, enhancing lattice structural stability.
Perovskite films exhibited improved phase purity, reduced residual stress, and suppressed ion migration, leading to a champion PCE of 26.59% and enhanced long-term stability.

Conclusions:

The kinetically segmented crystallization strategy effectively enhances perovskite film quality and device performance.
Macromolecular regulators like 3Cl-NC offer a viable approach to optimize PSCs for high efficiency and durability.
This work provides insights into controlling perovskite crystallization for advanced photovoltaic applications.