High-Voltage-Efficiency Inorganic Perovskite Solar Cells in a Wide Solution-Processing Window
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Updated: Feb 8, 2026

Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
Linxing Zhang1, Bo Li1, Jifeng Yuan1
1Institute for Advanced Materials and Technology , University of Science and Technology Beijing , Beijing 100083 , China.
Abstract:
Inorganic halide perovskites exhibit significant photovoltaic performance due to their structural stability and high open-circuit voltage ( Voc). Herein, a general strategy of solution engineering has been implemented to enable a wide solution-processing window for high Voc (∼1.3 V) and power conversion efficiency (PCE, ∼12.5%). We introduce a nontoxic solvent of dimethyl sulfoxide (DMSO) and an assisted heating process in the fabrication of CsPbI2Br (CPI2) to control the improved crystallization. A wide solution-processing window including a wide range of solvent components and solute concentrations has been realized. The CPI2-based inorganic perovskite solar cells (IPSCs) exhibit a high PCE up to 12.52%. More importantly, these devices demonstrate a remarkable Voc of 1.315 V. The performance has possessed such a region with high Voc and PCE in all Cs-based IPSCs, unveiling wide solution-processing windows with enhanced solution processability facilitating potential industrial application especially for tandem solar cells.
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