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CsPbI3 to Over Silicon as Solar Energy Products

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Published on : Aug 16, 2019

The reason why silicon leads in solar energy products is because of its stable nature. They are also extremely cost-effective and efficient when it comes to transforming sunrays into electricity. Now, in case silicon is to be replaced with any new material, it should match all the above qualities on silicon.  According to the studies by the international collaborations between the Okinawa Institute of Science and Technology Graduate University (OIST) and Shanghai Jiao Tong University, the Ecole Polytechnique Fédérale de Lausanne (EPFL), researchers have discovered a material to compete with silicon. The material has similar efficiency to generate electricity to challenge silicon supremacy.

Published in Science, the two groups demonstrated the way the new material CsPbI3 is stabilized in new surroundings. The material is claimed to be able to reach high transformation efficiencies. The compound is an inorganic perovskite, whose demand has gained impetus in solar industry because of its low price and high efficiency. The configuration stands as an important function since stabilizing these compounds has always been challenge since a long time.

Head of OIST's Energy Materials and Surface Sciences Unit, Professor Yabing Qi, announced that CsPbI3 can effectively contend with the leading material in the industry, silicon.

Study Was Conducted in Beta Phase Which is Less Unstable

CsPbI3 is usually studied in its dark phase, which is a well-known setup for crystalline structure. This phase known for absorption of sunlight, however, is highly unstable. The chemical structure degrades rapidly into a less stable form so as to absorb light. This form is yellowish in color after degradation.

But, the above study was conducted in beta stage of the crystal, which is a rarely known arrangement but is comparatively stable and cost effective process. Nevertheless, the stage has a drawback of low energy conversion efficiency.