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Self‐Healable Black Phosphorus Photodetectors
Author(s) -
Zhang Ye,
Zhang Feng,
Xu Yiguo,
Huang Weichun,
Wu Leiming,
Zhang Yupeng,
Zhang Xiuwen,
Zhang Han
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201906610
Subject(s) - black phosphorus , hexafluorophosphate , photodetector , materials science , electrochemistry , self healing , ionic liquid , optoelectronics , chemistry , organic chemistry , catalysis , electrode , medicine , alternative medicine , pathology
Black phosphorus (BP) has become one of the most promising materials for photoelectronic devices due to its excellent properties. However, the intrinsic instability of BP has severely hindered its practical applications. In this contribution, a hydrophobic polyionic liquid poly(1‐hexyl‐3‐vinylimidazolium) hexafluorophosphate salt (PIL‐TFSI) is applied to encapsulate BP quantum dots to form BP‐PIL for photo‐electrochemical‐type photodetector (PD) application. From both the results of experiment and density functional theory, the significantly enhanced stability of BP as well as the fluorination of BP is found. The as‐prepared PDs exhibit obviously improved photoresponse behavior (542 nA cm −2 ) and negligible attenuation after 90 days. In addition, the self‐healing capability can be found in the prepared PDs and the typical ON/OFF signals can still be detected after 50 cycles due to the self‐healing nature of PIL‐TFSI. It is believed that the introduction of PIL‐TFSI provides a new route for enhancing the stability of BP‐based photoelectronic devices in practical applications.