High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide Incorporation
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Scholar |
Altres documents de l'autoria: 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 |
Metadades
Títol
High-Efficiency Lead-Free Wide Band Gap Perovskite Solar Cells via Guanidinium Bromide IncorporationAutoria
Data de publicació
2021-09-27Editor
American Chemical SocietyISSN
2574-0962Cita bibliogràfica
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.1c00413Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/abs/10.1021/acsaem.1c00413Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
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. [-]
Publicat a
ACS Applied Energy Materials, 2021, vol. 4, no 6Entitat finançadora
JST Mirai Program | Chinese Scholarship Council
Codi del projecte o subvenció
JPMJMI17EA | CSC202008050034
Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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