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Conventional single-crystal silicon solar cells are facing increasingly strong competition from thin-film solar cells based primarily on polycrystalline absorber materials, such as cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS). However, if PVs are to make a significant contribution to satisfy global energy requirements, issues of sustainability and cost will need to be addressed with increased urgency. There is a clear need to expand the range of materials and processes that is available for thin-film solar cell manufacture, placing particular emphasis on low-energy processing and sustainable non-toxic raw materials. The potential of new materials is exemplified by copper zinc tin sulphide, which is emerging as a viable alternative to the more toxic CdTe and the more expensive CIGS absorber materials.<\/jats:p>","DOI":"10.1098\/rsta.2010.0348","type":"journal-article","created":{"date-parts":[[2011,4,4]],"date-time":"2011-04-04T03:28:34Z","timestamp":1301887714000},"page":"1840-1856","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":182,"title":["Towards sustainable photovoltaics: the search for new materials"],"prefix":"10.1098","volume":"369","author":[{"given":"L. M.","family":"Peter","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Bath, Bath BA2 7AU, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2011,5,13]]},"reference":[{"key":"e_1_3_3_2_2","unstructured":"BP plc. 2010 BP statistical review of world energy 2009. 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