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Embedding of Ti 3 C 2 T x Nanocrystals in MAPbI 3 Microwires for Improved Responsivity and Detectivity of Photodetector
Author(s) -
Guo Hang,
Wang Hongyue,
Fan Haibo,
Ye Qian,
Zhang Jin,
Cao Fengren,
Li Liang,
Tong Yu,
Wang Hongqiang
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202101954
Subject(s) - materials science , responsivity , passivation , perovskite (structure) , optoelectronics , fabrication , photodetector , nanocrystal , electron mobility , heterojunction , nanotechnology , layer (electronics) , chemical engineering , medicine , alternative medicine , pathology , engineering
Organic–inorganic hybrid MAPbI 3 microwires show unique optoelectronic properties for high performances of photodetectors (PDs). However, the defects‐assisted nonradiative recombination is harmful for carrier transport, which limits the performances improvement of MAPbI 3 microwires PDs. Traditional organic passivation agents effectively combine the surface defects of microwires and also reduce the mobility of overall film based on the perovskite microwires. Therefore, the improvement of internal carrier transport of microwires and the mobility of integrated film simultaneously is a particular challenge for fabrication of performances enhanced perovskite microwires PDs. Here, the Ti 3 C 2 T x NCs are fabricated by nonfocus laser irradiation in liquid environment, and hybrids the high conductive NCs in the MAPbI 3 microwires. The presence of Ti 3 C 2 T x NCs renders defects passivation, enhancement of crystalline orientation, charge transport, and carrier extraction for MAPbI 3 microwires, and boots the mobility of microwires based film, leading to about tenfolds enhancement of performances of PDs than that of the control. The maximum responsivity and the detectivity of the Ti 3 C 2 T x NCs embedded MAPbI 3 microwires PDs reach to 1.70 A W −1 and 7.0 × 10 11 Jones in visible window, respectively. The findings suggest that the laser generated high conductive Ti 3 C 2 T x NCs is an effective additive for perovskite microwires to fabricate performances enhanced optoelectronics.