Low‑Temperature Fabrication of Stable Black‑Phase CsPbI_(3) Perovskite Flexible Photodetectors Toward Wearable Health MonitoringOA
Flexible wearable optoelectronic devices fabricated fromorganic–inorganic hybrid perovskites significantly accelerate the developmentof portable energy,biomedicine,and sensing fields,but their poor thermal stabilityhinders further applications.Conversely,all-inorganic perovskites possessexcellent thermal stability,but black-phase all-inorganic perovskite filmusually requires high-temperature annealing steps,which increases energy consumptionand is not conducive to the fabrication of flexible wearable devices.In this work,an unprecedented low-temperature fabrication of stable blackphaseCsPbI3perovskite films is demonstrated by the in situ hydrolysis reactionof diphenylphosphinic chloride additive.The released diphenyl phosphateand chloride ions during the hydrolysis reaction significantly lower the phasetransition temperature and effectively passivate the defects in the perovskitefilms,yielding high-performance photodetectors with a responsivity of 42.1 AW−1 and a detectivity of 1.3×10^(14)Jones.Furthermore,high-fidelity imageand photoplethysmography sensors are demonstrated based on the fabricated flexible wearable photodetectors.This work provides a newperspective for the low-temperature fabrication of large-area all-inorganic perovskite flexible optoelectronic devices.
Yingjie Zhao;Yicheng Sun;Chaoxin Pei;Xing Yin;Xinyi Li;Yi Hao;Mengru Zhang;Meng Yuan;Jinglin Zhou;Yu Chen;Yanlin Song
College of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaCollege of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaCollege of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaCollege of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaKey Laboratory of Bio‑Inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,People’s Republic of ChinaCollege of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaCollege of Chemistry and Pingyuan Laboratory,Zhengzhou University,Zhengzhou 450001,People’s Republic of ChinaKey Laboratory of Bio‑Inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,People’s Republic of ChinaInstitute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,People’s Republic of ChinaInstitute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,People’s Republic of ChinaKey Laboratory of Green Printing,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,People’s Republic of China
In situ hydrolyzationLow-temperature processingAll-inorganic perovskiteFlexible photodetectorsHealth monitoring
《Nano-Micro Letters》 2025 (3)
P.232-245,14
supported by the National Natural Science Foundation of China(52303257,52321006,T2394480,and T2394484)the National Key R&D Program of China(Grant No.2023YFE0111500)Key Research&Development and Promotion of Special Project(Scientific Problem Tackling)of Henan Province(242102211090)the China Postdoctoral Science Foundation(2023TQ0300,and 2023M743171)the Postdoctoral Fellowship Program(Grade B)of China Postdoctoral Science Foundation(GZB20230666)College Student Innovation and Entrepreneurship Training Program of Zhengzhou University(202410459200)。
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