Mixed cation ordering scaffold polar 2D halide perovskite semiconductor for self-powered polarization-sensitive photodetection - Details

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Abstract：

Polar　semiconductors,　particularly　the　emerging　polar　two-dimensional　(2D)　halide　perovskites,　have　motivated　immense　interest　in　diverse　photoelectronic　devices　due　to　their　distinguishing　polarization-generated　photoelectric　effects.　However,　the　constraints　on　the　organic　cation＇s　choice　are　still　subject　to　limitations　of　polar　2D　halide　perovskites　due　to　the　size　of　the　inorganic　pocket　between　adjacent　corner-sharing　octahedra.　Herein,　a　mixed　spacer　cation　ordering　strategy　is　employed　to　assemble　a　polar　2D　halide　perovskite　NMAMAPbBr4　(NMPB,　NMA　is　N-methylbenzene　ammonium,　MA　is　methylammonium)　with　alternating　cation　in　the　interlayer　space.　Driven　by　the　incorporation　of　a　second　MA　cation,　the　perovskite　layer　transformed　from　a　2D　Pb7Br24　anionic　network　with　corner-　and　face-sharing　octahedra　to　a　flat　2D　PbBr4　perovskite　networks　only　with　corner-sharing　octahedra.　In　the　crystal　structure　of　NMPB,　the　asymmetric　hydrogen-bonding　interactions　between　ordered　mixed-spacer　cations　and　2D　perovskite　layers　give　rise　to　a　second　harmonic　generation　response　and　a　large　polarization　of　1.3　μC/cm2.　More　intriguingly,　the　ordered　2D　perovskite　networks　endow　NMPB　with　excellent　self-powered　polarization-sensitive　detection　performance,　showing　a　considerable　polarization-related　dichroism　ratio　up　to　1.87.　The　reconstruction　of　an　inorganic　framework　within　a　crystal　through　mixed　cation　ordering　offers　a　new　synthetic　tool　for　templating　perovskite　lattices　with　controlled　properties,　overcoming　limitations　of　conventional　cation　choice.　©　2025

Keyword：

2D halide perovskite ACI-type Bulk photovoltaic effect Mixed cation ordering Polar semiconductor Self-powered polarization sensitive photodetection

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[ 1 ] [Wang Q.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 2 ] [Wang Q.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 3 ] [Li X.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 4 ] [Li X.]University of Chinese Academy of Sciences, Beijing, 100049, China
[ 5 ] [Zhang F.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 6 ] [Wei Q.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 7 ] [Wei Q.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 8 ] [Yue Z.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 9 ] [Yue Z.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 10 ] [Lin X.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 11 ] [Lv Y.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 12 ] [Liu X.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 13 ] [Liu X.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 14 ] [Liu X.]University of Chinese Academy of Sciences, Beijing, 100049, China
[ 15 ] [Luo J.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 16 ] [Luo J.]State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 17 ] [Luo J.]University of Chinese Academy of Sciences, Beijing, 100049, China

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Source ：

Chinese Chemical Letters

ISSN： 1001-8417

Year： 2025

Issue： 10

Volume： 36

9 . 4 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 2

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