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Herein, the synthesis and characterization of two photochromic dyes based on a diaryl\u2010naphthopyran core, NPI\u2010ThPh and NPIFuPh, for use in dye sensitized solar cells is reported. Compared to the reference dye NPI, the molecules vary by the nature of the spacer, a thiophene or a furan, connecting the photochromic unit and the anchoring function. It was found that swapping a phenyl for a thiophene or a furan leads to an improvement of the absorption properties of the molecules, both in solution and after grafting on TiO<jats:sub>2<\/jats:sub> electrodes, however their photochromic process becomes not fully reversible. Despite better absorption in the visible range, the new dyes show poorer photochromic and photovoltaic properties in devices compared to NPI. Thanks to UV\u2013Vis spectroscopy, theoretical modelling, electrical characterization of the cells, and impedance spectroscopy, the factors limiting their performances have been unraveled. This study contributes to better understand the connection between photochromic and photovoltaic properties, which is key to develop better performing molecules of this class.<\/jats:p><\/jats:sec>","DOI":"10.1002\/solr.202100929","type":"journal-article","created":{"date-parts":[[2021,12,4]],"date-time":"2021-12-04T11:48:25Z","timestamp":1638618505000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Photochromic Naphthopyran Dyes Incorporating a Benzene, Thiophene, or Furan Spacer: Effect on Photochromic, Optoelectronic, and Photovoltaic Properties in Dye\u2010Sensitized Solar Cells"],"prefix":"10.1002","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1747-693X","authenticated-orcid":false,"given":"Johan","family":"Liotier","sequence":"first","affiliation":[{"name":"CEA CNRS IRIG-SyMMES University of Grenoble Alpes  38000 Grenoble 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