Perovskite solar cells are solar cells using perovskite organic metal halide semiconductors as light-absorbing materials. In recent years, research on perovskite solar cells has continuously refreshed the conversion efficiency. Record. It has excellent solar-electric conversion efficiency (PCE), and the manufacturing cost is low. Recently, the research team of the University of Toronto broke through the bottleneck of producing a low-cost printable perovskite solar cell.
Professor Ted Sargent of the University of Toronto said "Perovskite solar cells can be printed with existing technologies to produce cheap and low-cost solar cells. The combination of perovskite solar energy and silicon-based solar cells can jointly improve the conversion efficiency . Can be achieved at low temperatures."
And they have developed a brand-new process to produce solar cell-selective layer (ESL), a key component of solar cell, which can bridge between optical crystal and electronic circuit, and the selectivity of new process construction. The single-electrode substrate removes obstacles for the low-temperature production of perovskite solar cells, making the printable perovskite solar cells a reality .
Dr. Hairen Tan, leader of the research team, stated that “Traditionally producing ESL components requires higher temperatures (500°C), so you cannot place flexible plastic plates on fiberized silicon-based solar cells. melt."
The new reaction process allows ESL to grow on the electrode of the solvent, which can create ESL components at 150 degrees Celsius, which is much lower than the melting point of most plastic products. The photoelectric conversion efficiency of the printable perovskite solar cell produced by this process has reached 20.1%, which is only slightly lower than the 22.1% photoelectric conversion efficiency of the perovskite solar cell produced by the high temperature process. The new printable perovskite solar cell produced by Dr. Tan's team can maintain its original efficiency of more than 90% after 500 hours of use.
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