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Controlling the crystals for a 17.96% efficient perovskite solar cell

Scientists in Taiwan demonstrated a fresh solution to produce high-purity lead-iodide, as a precursor material for a perovskite solar cell. Through the use of temperature to raised control the orientation of crystals, the group could show higher efficiencies once the precursor was used to fabricate a perovskite layer and subsequently an operating solar cell.

ITRI/Pei-Ting Chiu

A perovskite solar cell can only just be as effective as the materials that get into it, and of all many methods to improving their performance and stability, and developing processes to create them at scale, the ones that concentrate on the precursor materials that go in to the perovskite layer have obtained comparatively little attention.

Several scientists led by the Industrial Technology and Research Institute in Taiwan done the fabrication of lead-iodide (PbI2), a component in practically all of the greatest perovskite solar panels produced up to now. They built on earlier research which has shown the purity and formation of the material is actually a main factor in performance once it really is built-into a solar cell.

The groups latest work demonstrates the way the crystalline structure and orientation of PbI2 ultimately have a substantial effect on cell performance. The researchers also introduce a straightforward solution to control this using temperature during synthesis. They described their findings in A novel solution to control the crystallographic preferred orientation of lead iodide toward highly efficient and large-area perovskite solar panels, that was recently published in RRL Solar.

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