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dc.contributor.authorChen, Mengmeng
dc.contributor.authorKamarudin, Muhammad Akmal
dc.contributor.authorBaranwal, Ajay Kumar
dc.contributor.authorKapil, Gaurav
dc.contributor.authorRipolles, Teresa S.
dc.contributor.authorNishimura, Kohei
dc.contributor.authorHirotani, Daisuke
dc.contributor.authorSahamir, Shahrir Razey
dc.contributor.authorZhang, Zheng
dc.contributor.authorDing, Chao
dc.contributor.authorSanehira, Yoshitaka
dc.contributor.authorBisquert, Juan
dc.contributor.authorShen, Qing
dc.contributor.authorHayase, Shuzi
dc.date.accessioned2021-10-21T07:32:19Z
dc.date.available2021-10-21T07:32:19Z
dc.date.issued2021-09-27
dc.identifier.citationChen, M., Kamarudin, M. A., Baranwal, A. K., Kapil, G., Ripolles, T. S., Nishimura, K., Hirotani, D., Sahamir, S. R., Zhang, Z., Ding, C., Sanehira, Y., Bisquert, J., Shen, Q., Hayase, S. High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide Incorporation. ACS Applied Energy Materials 2021, 4 (6), 5615-5624 DOI: 10.1021/acsaem.1c00413ca_CA
dc.identifier.issn2574-0962
dc.identifier.urihttp://hdl.handle.net/10234/195118
dc.description.abstractDespite lead halide perovskite(top)/silicon(bottom) tandem solar cell achieving >29% efficiency, the toxicity of lead limits the adoption of perovskites in electronic devices. To solve this problem, tin perovskite has been suggested as an alternative candidate to be used as the top cell. However, most of the reports on tin perovskite solar cells are based on narrow band gap materials (band gap: 1.20–1.40 eV), which are not suitable to be used as the tandem top cell. In addition, the efficiency of the previously reported wide band gap lead-free perovskites is not satisfactory, shown to be less than 2.00%. This study explores the fabrication of the wide band gap (1.61 eV) ASnI2Br perovskite solar cells through the optimization of formamidinium and guanidinium content to improve the efficiency from 1.68 to 7.00%. Substituting the A site with larger cation results in a larger crystal size, which translated into higher device stability. Better energy-level alignment within the device significantly enhanced the charge injection and extraction, which translated into higher open-circuit voltage. This work provides proof that tin-halide perovskite solar cells have the potential in the fabrication of lead-free all-perovskite tandem solar cells.ca_CA
dc.format.extent10 p.ca_CA
dc.language.isoengca_CA
dc.publisherAmerican Chemical Societyca_CA
dc.relation.isPartOfACS Applied Energy Materials, 2021, vol. 4, no 6ca_CA
dc.rights.urihttp://rightsstatements.org/vocab/CNE/1.0/ca_CA
dc.subjectwide band gapca_CA
dc.subjectlead freeca_CA
dc.subjectenergy band alignmentca_CA
dc.subjectA-site engineeringca_CA
dc.subjectcrystal growthca_CA
dc.titleHigh-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide Incorporationca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttps://doi.org/10.1021/acsaem.1c00413
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_CA
dc.relation.publisherVersionhttps://pubs.acs.org/doi/abs/10.1021/acsaem.1c00413ca_CA
dc.description.sponsorshipThis research was supported by JST Mirai Program (JPMJMI17EA) and the Chinese Scholarship Council (CSC202008050034).
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_CA
project.funder.nameJST Mirai Programca_CA
project.funder.nameChinese Scholarship Councilca_CA
oaire.awardNumberJPMJMI17EAca_CA
oaire.awardNumberCSC202008050034ca_CA


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