{"id":363274,"date":"2022-03-25T13:12:16","date_gmt":"2022-03-25T12:12:16","guid":{"rendered":"https:\/\/innovationorigins.com\/?post_type=selected&p=363274"},"modified":"2022-03-25T13:12:16","modified_gmt":"2022-03-25T12:12:16","slug":"more-efficient-perovskite-based-solar-cells-thanks-to-supramolecular-chemistry","status":"publish","type":"selected","link":"https:\/\/ioplus.nl\/archive\/en\/selected\/more-efficient-perovskite-based-solar-cells-thanks-to-supramolecular-chemistry\/","title":{"rendered":"More efficient perovskite-based solar cells thanks to supramolecular chemistry"},"content":{"rendered":"\n

Supramolecular chemistry and the intermolecular interaction involving halogen atoms in organic molecules can help improve the performance of perovskite-based solar cells. Thus enabling them to achieve high levels of efficiency and increased stability. This is the conclusion of researchers at the\u00a0Politecnico di Milano\u00a0who has published in the prestigious\u00a0Angewandte Chemie International Edition<\/a>.<\/p>\n\n\n\n

Organic-inorganic hybrid perovskites – ionic compounds consisting of small organic cations and metal halides – have been known since the 19th century, but they have only recently been used in optoelectronics to construct lasers diodes, photodetectors, and solar cells. In particular, the first perovskite-based photovoltaic cell was produced in 2009. Since then, there has been intensive research into achieving an efficiency of more than 25 percent, which would surpass even the silicon that currently dominates the photovoltaic market.<\/p>\n\n\n\n

Energy losses<\/h2>\n\n\n\n

The low cost and excellent perovskites’ performance make them very attractive for photovoltaic applications. However, there are still several problems that prevent these materials from entering the market. First of all, there is their low stability in air and humidity. In addition, the presence of defects, i.e., imperfections in the crystal lattice, can generate ‘trap states’ that interfere with the movement of charge carriers (electrons and holes) generated by the light within the material, trapping them and causing electrical energy losses. Generally, these trap states are unbound halide ions that can move under the effect of an electric field and recombine with holes.<\/p>\n\n\n

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Solution found for lead leakages from perovskite solar cells<\/div>
Perovskite solar cells have a number of advantages over silicon solar cells. It is a cheaper raw material, less of it is needed, and the […]<\/div><\/div><\/div>\n\n\n

The study conducted at the Politecnico showed that using additives capable of forming halogen bonds with the halide ions present in perovskites provides significant advantages for developing solar cells with better crystallinity and more excellent stability. Halogen bonding enables fluorinated molecules to be introduced, which passivate the surface halides to produce hydrophobic and water-repellent perovskites. In this way, trap states are blocked, and efficiency is increased.<\/p>\n\n\n\n

Halogen bonding<\/h2>\n\n\n\n

In addition, the surface modification of perovskite with bifunctional molecules capable of forming halogen bonds enables better integration of the perovskite within the solar cell, facilitating the generation of electrical current.<\/p>\n\n\n\n

From the data reported, it appears that halogen bonding has considerable potential for the development of a new generation of solar cells based on perovskites. However, a better atomic\/molecular understanding of these materials is needed to exploit halogen bonding advantages fully.\u00a0<\/p>\n","protected":false},"author":1760,"featured_media":515049,"template":"","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":""},"categories":[8553],"tags":[21692,22004,25037],"location":[47626],"internal_archives":[],"class_list":["post-363274","selected","type-selected","status-publish","has-post-thumbnail","hentry","category-digital","tag-perovskite","tag-solar-energy","tag-solar-panels","location-italy"],"blocksy_meta":[],"acf":[],"featured_img":"https:\/\/ioplus.nl\/archive\/wp-content\/uploads\/2022\/04\/am0c21137_0006.gif","coauthors":[],"author_meta":{"author_link":"https:\/\/ioplus.nl\/archive\/author\/arnoud-cornelissen\/","display_name":"Arnoud Cornelissen"},"relative_dates":{"created":"Posted 4 years ago","modified":"Updated 4 years ago"},"absolute_dates":{"created":"Posted on March 25, 2022","modified":"Updated on March 25, 2022"},"absolute_dates_time":{"created":"Posted on March 25, 2022 1:12 pm","modified":"Updated on March 25, 2022 1:12 pm"},"featured_img_caption":"","tax_additional":{"category":{"linked":["Digital<\/a>"],"unlinked":["Digital<\/span>"],"slug":"category","name":"Categories"},"post_tag":{"linked":["perovskite<\/a>","solar energy<\/a>","solar panels<\/a>"],"unlinked":["perovskite<\/span>","solar energy<\/span>","solar panels<\/span>"],"slug":"post_tag","name":"Tags"},"language":{"linked":["EN<\/a>"],"unlinked":["EN<\/span>"],"slug":"language","name":"Tags"},"post_translations":{"linked":["pll_623db49b19993<\/a>"],"unlinked":["pll_623db49b19993<\/span>"],"slug":"post_translations","name":""},"location":{"linked":["Italy<\/a>"],"unlinked":["Italy<\/span>"],"slug":"location","name":"Locations"},"internal_archives":{"linked":[],"unlinked":[],"slug":"internal_archives","name":"Internal Archives"}},"series_order":"","_links":{"self":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected\/363274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected"}],"about":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/types\/selected"}],"author":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/users\/1760"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media\/515049"}],"wp:attachment":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media?parent=363274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/categories?post=363274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/tags?post=363274"},{"taxonomy":"location","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/location?post=363274"},{"taxonomy":"internal_archives","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/internal_archives?post=363274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}