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Unfortunately, the most efficient perovskite solar cells all contain lead (Pb), which is an unsettling flaw that leads to severe environmental concerns and is therefore a stumbling block envisioning their large-scale application. Aiming for the retention of favorable electro-optical properties, tin (Sn) has been considered the most likely substitute. Preliminary studies have however shown that Sn-based perovskites are highly unstable and, moreover, Sn is also enlisted as a harmful chemical, with similar concerns regarding environment and health. To bring more clarity into the appropriateness of both metals in perovskite solar cells, we provide a case study with systematic comparison regarding the environmental impact of Pb- and Sn-based perovskites, using zebrafish (\n                    <jats:italic>Danio Rerio<\/jats:italic>\n                    ) as model organism. Uncovering an unexpected route of intoxication in the form of acidification, it is shown that Sn based perovskite may not be the ideal Pb surrogate.\n                  <\/jats:p>","DOI":"10.1038\/srep18721","type":"journal-article","created":{"date-parts":[[2016,1,13]],"date-time":"2016-01-13T06:36:57Z","timestamp":1452667017000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":587,"title":["Assessing the toxicity of Pb- and Sn-based perovskite solar cells in model organism Danio rerio"],"prefix":"10.1038","volume":"6","author":[{"given":"Aslihan","family":"Babayigit","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dinh","family":"Duy Thanh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anitha","family":"Ethirajan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean","family":"Manca","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc","family":"Muller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans-Gerd","family":"Boyen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bert","family":"Conings","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2016,1,13]]},"reference":[{"key":"BFsrep18721_CR1","doi-asserted-by":"crossref","first-page":"1439","DOI":"10.1016\/j.compchemeng.2011.04.017","volume":"35","author":"S Ranjan","year":"2011","unstructured":"Ranjan, S., Balaji, S., Panella, R. 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