Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells
Abstract Formamidinium lead triiodide (FAPbI3) perovskite quantum dots (PQDs) show great advantages in photovoltaic applications due to their ideal bandgap energy, high stability and solution processability. The anti-solvent used for the post-treatment of FAPbI3 PQD solid films significantly affects...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer & Higher Education Press
2022-09-01
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| Series: | Frontiers of Optoelectronics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s12200-022-00038-z |
| _version_ | 1811265152461307904 |
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| author | Wentao Fan Qiyuan Gao Xinyi Mei Donglin Jia Jingxuan Chen Junming Qiu Qisen Zhou Xiaoliang Zhang |
| author_facet | Wentao Fan Qiyuan Gao Xinyi Mei Donglin Jia Jingxuan Chen Junming Qiu Qisen Zhou Xiaoliang Zhang |
| author_sort | Wentao Fan |
| collection | DOAJ |
| description | Abstract Formamidinium lead triiodide (FAPbI3) perovskite quantum dots (PQDs) show great advantages in photovoltaic applications due to their ideal bandgap energy, high stability and solution processability. The anti-solvent used for the post-treatment of FAPbI3 PQD solid films significantly affects the surface chemistry of the PQDs, and thus the vacancies caused by surface ligand removal inhibit the optoelectronic properties and stability of PQDs. Here, we study the effects of different anti-solvents with different polarities on FAPbI3 PQDs and select a series of organic molecules for surface passivation of PQDs. The results show that methyl acetate could effectively remove surface ligands from the PQD surface without destroying its crystal structure during the post-treatment. The benzamidine hydrochloride (PhFACl) applied as short ligands of PQDs during the post-treatment could fill the A-site and X-site vacancies of PQDs and thus improve the electronic coupling of PQDs. Finally, the PhFACl-based PQD solar cell (PQDSC) achieves a power conversion efficiency of 6.4%, compared to that of 4.63% for the conventional PQDSC. This work provides a reference for insights into the surface passivation of PQDs and the improvement in device performance of PQDSCs. Graphical abstract |
| first_indexed | 2024-04-12T20:17:33Z |
| format | Article |
| id | doaj.art-b497859909c740f2bde65dde5102c208 |
| institution | Directory Open Access Journal |
| issn | 2095-2759 2095-2767 |
| language | English |
| last_indexed | 2024-04-12T20:17:33Z |
| publishDate | 2022-09-01 |
| publisher | Springer & Higher Education Press |
| record_format | Article |
| series | Frontiers of Optoelectronics |
| spelling | doaj.art-b497859909c740f2bde65dde5102c2082022-12-22T03:18:05ZengSpringer & Higher Education PressFrontiers of Optoelectronics2095-27592095-27672022-09-0115111210.1007/s12200-022-00038-zLigand exchange engineering of FAPbI3 perovskite quantum dots for solar cellsWentao Fan0Qiyuan Gao1Xinyi Mei2Donglin Jia3Jingxuan Chen4Junming Qiu5Qisen Zhou6Xiaoliang Zhang7School of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversitySchool of Materials Science and Engineering, Beihang UniversityAbstract Formamidinium lead triiodide (FAPbI3) perovskite quantum dots (PQDs) show great advantages in photovoltaic applications due to their ideal bandgap energy, high stability and solution processability. The anti-solvent used for the post-treatment of FAPbI3 PQD solid films significantly affects the surface chemistry of the PQDs, and thus the vacancies caused by surface ligand removal inhibit the optoelectronic properties and stability of PQDs. Here, we study the effects of different anti-solvents with different polarities on FAPbI3 PQDs and select a series of organic molecules for surface passivation of PQDs. The results show that methyl acetate could effectively remove surface ligands from the PQD surface without destroying its crystal structure during the post-treatment. The benzamidine hydrochloride (PhFACl) applied as short ligands of PQDs during the post-treatment could fill the A-site and X-site vacancies of PQDs and thus improve the electronic coupling of PQDs. Finally, the PhFACl-based PQD solar cell (PQDSC) achieves a power conversion efficiency of 6.4%, compared to that of 4.63% for the conventional PQDSC. This work provides a reference for insights into the surface passivation of PQDs and the improvement in device performance of PQDSCs. Graphical abstracthttps://doi.org/10.1007/s12200-022-00038-zFAPbI3Perovskite quantum dotAntisolventSurface passivationSolar cell |
| spellingShingle | Wentao Fan Qiyuan Gao Xinyi Mei Donglin Jia Jingxuan Chen Junming Qiu Qisen Zhou Xiaoliang Zhang Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells Frontiers of Optoelectronics FAPbI3 Perovskite quantum dot Antisolvent Surface passivation Solar cell |
| title | Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells |
| title_full | Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells |
| title_fullStr | Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells |
| title_full_unstemmed | Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells |
| title_short | Ligand exchange engineering of FAPbI3 perovskite quantum dots for solar cells |
| title_sort | ligand exchange engineering of fapbi3 perovskite quantum dots for solar cells |
| topic | FAPbI3 Perovskite quantum dot Antisolvent Surface passivation Solar cell |
| url | https://doi.org/10.1007/s12200-022-00038-z |
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