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author：

Li, X. (Li, X..) [1] | Liu, A. (Liu, A..) [2] | Wang, Z. (Wang, Z..) [3] | Wei, Y. (Wei, Y..) [4] | Lin, Q. (Lin, Q..) [5] | Chen, Y. (Chen, Y..) [6] | Liu, Y. (Liu, Y..) [7] | Hong, M. (Hong, M..) [8]

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Scopus CSCD

Abstract：

Self-trapped　excitons　(STEs)　emission　from　halide　perovskites　with　strong　exciton-phonon　coupling　has　attracted　considerable　attention　due　to　the　widespread　application　in　optoelectronic　devices.　Nevertheless,　the　in-depth　understanding　of　the　relationship　between　exciton-phonon　coupling　and　luminescence　intensity　remains　incomplete.　Herein,　a　doping-enhanced　exciton-phonon　coupling　effect　is　observed　in　Cs3Cu2I5　nanocrystals　(NCs),　which　leads　to　a　remarkable　increasement　of　their　STEs　emission　efficiency.　Mechanism　study　shows　that　the　hetero-valent　substitution　of　Cu+　with　alkaline-earth　metal　ions　(AE2+)　causes　a　greater　degree　of　Jahn–Teller　distortion　between　the　ground　state　and　excited　state　structures　of　[Cu2I5]3−　clusters　as　evidenced　by　our　spectral　analysis　and　first-principles　calculations.　As　a　consequence,　an　X-ray　detector　based　on　these　Cs3Cu2I5:AE　NCs　delivers　an　X-ray　imaging　resolution　of　up　to　10　lp·mm−1　and　a　low　detection　limit　of　0.37　µGyair·s−1,　disclosing　the　potential　of　doping-enhanced　exciton-phonon　coupling　effect　in　improving　STEs-emission　and　practical　application　for　X-ray　imaging.[Figure　not　available:　see　fulltext.]　©　2023,　Tsinghua　University　Press.

Keyword：

Cs3Cu2I5 exciton-phonon coupling nanocrystals self-trapped exciton X-ray image

Community：

  • [ 1 ] [Li X.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Li X.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 3 ] [Liu A.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Liu A.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 5 ] [Wang Z.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 6 ] [Wang Z.]School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
  • [ 7 ] [Wei Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 8 ] [Wei Y.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
  • [ 9 ] [Lin Q.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 10 ] [Chen Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 11 ] [Liu Y.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
  • [ 12 ] [Liu Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 13 ] [Liu Y.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
  • [ 14 ] [Hong M.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
  • [ 15 ] [Hong M.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  • [ 16 ] [Hong M.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China
  • [ 17 ] [Hong M.]School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China

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Source ：

Nano Research

ISSN： 1998-0124

Year： 2023

Issue： 7

Volume： 16

Page： 10476-10482

9 . 6

JCR@2023

9 . 6 0 0

JCR@2023

ESI HC Threshold：30

JCR Journal Grade：1

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 11

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 0

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