Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides
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Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides. / Bai, Tianxin; Wang, Xiaochen; He, Yanmei; Wei, Haiwen; Su, Yan; Chen, Junsheng.
In: Advanced Optical Materials, 2023, p. 3251–3257.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Turning Self-Trapped Exciton Emission to Near-Infrared Region in Thermochromism Zero-Dimensional Hybrid Metal Halides
AU - Bai, Tianxin
AU - Wang, Xiaochen
AU - He, Yanmei
AU - Wei, Haiwen
AU - Su, Yan
AU - Chen, Junsheng
N1 - Publisher Copyright: © 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.
PY - 2023
Y1 - 2023
N2 - Low dimensional lead-free metal halides have become the spotlight of the research on developing multifunctional optoelectronic materials as their properties show a wide range of tunability. However, most reported low dimensional metal halides only function in the ultra-violet to visible range due to their large bandgap. Moreover, the organic cation based low dimensional metal halides show limited thermal stability; on the other hand, their inorganic cation based counterparts suffer from limited solution processability. A hybrid cation approach is proposed, where a zero dimensional (0D) metal halide ((DFPD)2CsBiI6) is developed by using mixed organic–inorganic cations: 4, 4-difluoropiperidine (DFPD) and cesium (Cs+). This ensures both thermal stability and solution processability. Furthermore, [BiI6]3− octahedra are serving as active light absorption units, which ensures the bandgap to be located at the visible region. Its photoluminescence (PL) is further shifted to the near infrared (NIR) region by doping (DFPD)2CsBiI6 with antimony (Sb3+). The developed materials show multifunctional properties: thermochromic behavior, light detection, and NIR light emitting. This study expands the scope of developing multifunctional 0D metal halides.
AB - Low dimensional lead-free metal halides have become the spotlight of the research on developing multifunctional optoelectronic materials as their properties show a wide range of tunability. However, most reported low dimensional metal halides only function in the ultra-violet to visible range due to their large bandgap. Moreover, the organic cation based low dimensional metal halides show limited thermal stability; on the other hand, their inorganic cation based counterparts suffer from limited solution processability. A hybrid cation approach is proposed, where a zero dimensional (0D) metal halide ((DFPD)2CsBiI6) is developed by using mixed organic–inorganic cations: 4, 4-difluoropiperidine (DFPD) and cesium (Cs+). This ensures both thermal stability and solution processability. Furthermore, [BiI6]3− octahedra are serving as active light absorption units, which ensures the bandgap to be located at the visible region. Its photoluminescence (PL) is further shifted to the near infrared (NIR) region by doping (DFPD)2CsBiI6 with antimony (Sb3+). The developed materials show multifunctional properties: thermochromic behavior, light detection, and NIR light emitting. This study expands the scope of developing multifunctional 0D metal halides.
KW - lead-free
KW - mixed organic-inorganic cation
KW - multifunctional applications
KW - Thermochromism
KW - ultrafast dynamics
U2 - 10.1002/adom.202301110
DO - 10.1002/adom.202301110
M3 - Journal article
AN - SCOPUS:85164785508
SP - 3251
EP - 3257
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
ER -
ID: 360135076