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All-Optical Switchi...
All-Optical Switching Based on Sub-Bandgap Photoactivation of Charge Trapping in Metal Halide Perovskites
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- Wan, Sushu (author)
- Nanjing University
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- Li, Ke (author)
- Nanjing University
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- Zou, Meijun (author)
- Nanjing University
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- Hong, Daocheng (author)
- Nanjing University
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- Xie, Mingcai (author)
- Nanjing University
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- Tan, Hairen (author)
- Nanjing University
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- Scheblykin, Ivan G. (author)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LTH profilområde: Avancerade ljuskällor,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH
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- Tian, Yuxi (author)
- Nanjing University
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(creator_code:org_t)
- 2023-02-21
- 2023
- English.
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In: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 35:13
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Abstract
Subject headings
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- Controllable optical properties are crucial for the application of light-emitting materials in optical devices. In this work, controllable photoluminescence in metal halide perovskite crystals is realized via photoactivation of their defects. It is found that under continuous excitation, the photoluminescence intensity of a CH3NH3PbBr3 crystal can be fully controlled by sub-bandgap energy photon illumination. Such optically controllable emission behavior is rather general as it is observed also in CsPbBr3 and other perovskite materials. The switching mechanism is assigned to reversible light-induced activation/deactivation of nonradiative recombination centers, the presence of which relates to an excess of Pb during perovskite synthesis. Given the success of perovskites in photovoltaics and optoelectronics, it is believed that the discovery of green luminescence controlled by red illumination will extend the application scope of perovskites toward optical devices and intelligent control.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- all-optical switching
- perovskites
- photoluminescence
- sub-bandgap
- switching mechanism
Publication and Content Type
- art (subject category)
- ref (subject category)
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