Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability

doi:10.1126/science.abf5602

GSTDTAP > 气候变化

DOI	10.1126/science.abf5602
	Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability
	Zhenghong Dai; Srinivas K. Yadavalli; Min Chen; Ali Abbaspourtamijani; Yue Qi; Nitin P. Padture
	2021-05-07
发表期刊	Science
出版年	2021
英文摘要	The low formation energies of the active layers in perovskite solar cells lead to low-toughness materials that are compliant and soft, which limits their interface stability and long-term reliability. Dai et al. show that treatment with iodine-terminated self-assembled monolayers that react with surface hydroxyl groups (which ultimately creates unwanted charge traps and voids) leads to a 50% increase of adhesion toughness between the electron transport layer and a mixed-composition perovskite thin film. The projected point at which 80% of the operating efficiency in perovskite solar cells was still retained increased from ∼700 to 4000 hours for 1-sun exposure with continuous maximum power point tracking. Science , this issue p. [618][1] 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. [1]: /lookup/doi/10.1126/science.abf5602
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/325940
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Zhenghong Dai,Srinivas K. Yadavalli,Min Chen,et al. Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability[J]. Science,2021.
APA	Zhenghong Dai,Srinivas K. Yadavalli,Min Chen,Ali Abbaspourtamijani,Yue Qi,&Nitin P. Padture.(2021).Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability.Science.
MLA	Zhenghong Dai,et al."Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability".Science (2021).