High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide Incorporation
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Scholar |
Otros documentos de la autoría: Chen, Mengmeng; Kamarudin, Muhammad Akmal; Baranwal, Ajay Kumar; Kapil, Gaurav; Ripolles, Teresa S.; Nishimura, Kohei; Hirotani, Daisuke; Sahamir, Shahrir Razey; Zhang, Zheng; Ding, Chao; Sanehira, Yoshitaka; Bisquert, Juan; Shen, Qing; Hayase, Shuzi
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https://doi.org/10.1021/acsaem.1c00413 |
Metadatos
Título
High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide IncorporationAutoría
Fecha de publicación
2021-09-27Editor
American Chemical SocietyISSN
2574-0962Cita bibliográfica
Chen, 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.1c00413Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://pubs.acs.org/doi/abs/10.1021/acsaem.1c00413Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Despite 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 ... [+]
Despite 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. [-]
Publicado en
ACS Applied Energy Materials, 2021, vol. 4, no 6Entidad financiadora
JST Mirai Program | Chinese Scholarship Council
Código del proyecto o subvención
JPMJMI17EA | CSC202008050034
Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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