Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability
Iodine-terminated self-assembled monolayer (I-SAM) was used in perovskite solar cells (PSCs) to achieve a 50% increase of adhesion toughness at the interface between the electron transport layer (ETL) and the halide perovskite thin film to enhance mechanical reliability. Treatment with I-SAM also in...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2021-05, Vol.372 (6542), p.618-622 |
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| creator | Dai, Zhenghong Yadavalli, Srinivas K Chen, Min Abbaspourtamijani, Ali Qi, Yue Padture, Nitin P |
| description | Iodine-terminated self-assembled monolayer (I-SAM) was used in perovskite solar cells (PSCs) to achieve a 50% increase of adhesion toughness at the interface between the electron transport layer (ETL) and the halide perovskite thin film to enhance mechanical reliability. Treatment with I-SAM also increased the power conversion efficiency from 20.2% to 21.4%, reduced hysteresis, and improved operational stability with a projected T80 (time to 80% initial efficiency retained) increasing from ~700 hours to 4000 hours under 1-sun illumination and with continuous maximum power point tracking. Operational stability-tested PSC without SAMs revealed extensive irreversible morphological degradation at the ETL/perovskite interface, including voids formation and delamination, whereas PSCs with I-SAM exhibited minimal damage accumulation. This difference was attributed to a combination of a decrease in hydroxyl groups at the interface and the higher interfacial toughness. |
| doi_str_mv | 10.1126/science.abf5602 |
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Treatment with I-SAM also increased the power conversion efficiency from 20.2% to 21.4%, reduced hysteresis, and improved operational stability with a projected T80 (time to 80% initial efficiency retained) increasing from ~700 hours to 4000 hours under 1-sun illumination and with continuous maximum power point tracking. Operational stability-tested PSC without SAMs revealed extensive irreversible morphological degradation at the ETL/perovskite interface, including voids formation and delamination, whereas PSCs with I-SAM exhibited minimal damage accumulation. This difference was attributed to a combination of a decrease in hydroxyl groups at the interface and the higher interfacial toughness.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.abf5602</identifier><identifier>PMID: 33958474</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Adhesion ; Damage accumulation ; Efficiency ; Electron transport ; Energy conversion efficiency ; Free energy ; Heat of formation ; Hydroxyl groups ; Interface stability ; Interfaces ; Iodine ; Maximum power tracking ; Monolayers ; Perovskites ; Photovoltaic cells ; Reliability ; Self-assembled monolayers ; Self-assembly ; Solar cells ; Thin films ; Toughness</subject><ispartof>Science (American Association for the Advancement of Science), 2021-05, Vol.372 (6542), p.618-622</ispartof><rights>Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. 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| subjects | Adhesion Damage accumulation Efficiency Electron transport Energy conversion efficiency Free energy Heat of formation Hydroxyl groups Interface stability Interfaces Iodine Maximum power tracking Monolayers Perovskites Photovoltaic cells Reliability Self-assembled monolayers Self-assembly Solar cells Thin films Toughness |
| title | Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability |
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