Spatially modulating the fluorescence color of mixed-halide perovskite nanoplatelets through direct femtosecond laser writing

Chunhua Zhou, Guiyuan Cao, Zhixing Gan, Qingdong Ou, Weijian Chen, Qiaoliang Bao, Baohua Jia, Xiaoming Wen

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm; the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.

Original languageEnglish
Pages (from-to)26017-26023
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number29
DOIs
Publication statusPublished - 24 Jul 2019

Keywords

  • direct laser writing
  • femtosecond laser fabrication
  • fluorescence
  • gradient band gap
  • mixed-halide perovskites

Cite this

Zhou, Chunhua ; Cao, Guiyuan ; Gan, Zhixing ; Ou, Qingdong ; Chen, Weijian ; Bao, Qiaoliang ; Jia, Baohua ; Wen, Xiaoming. / Spatially modulating the fluorescence color of mixed-halide perovskite nanoplatelets through direct femtosecond laser writing. In: ACS Applied Materials and Interfaces. 2019 ; Vol. 11, No. 29. pp. 26017-26023.
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abstract = "Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm; the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.",
keywords = "direct laser writing, femtosecond laser fabrication, fluorescence, gradient band gap, mixed-halide perovskites",
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Spatially modulating the fluorescence color of mixed-halide perovskite nanoplatelets through direct femtosecond laser writing. / Zhou, Chunhua; Cao, Guiyuan; Gan, Zhixing; Ou, Qingdong; Chen, Weijian; Bao, Qiaoliang; Jia, Baohua; Wen, Xiaoming.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 29, 24.07.2019, p. 26017-26023.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Spatially modulating the fluorescence color of mixed-halide perovskite nanoplatelets through direct femtosecond laser writing

AU - Zhou, Chunhua

AU - Cao, Guiyuan

AU - Gan, Zhixing

AU - Ou, Qingdong

AU - Chen, Weijian

AU - Bao, Qiaoliang

AU - Jia, Baohua

AU - Wen, Xiaoming

PY - 2019/7/24

Y1 - 2019/7/24

N2 - Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm; the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.

AB - Lead halide perovskites are widely applied in not only photovoltaics but also on-chip light sources and photon detection. To promote the incorporation of perovskite into integrated devices, microscale color patterning flexibility is a very important step. Here, we demonstrate spatially resolved modulation of the fluorescence of nanoplatelets (NPs) by femtosecond direct laser writing (fs-DLW). As the perovskite NP for the fs-DLW pattern is specially designed with a gradual bromide-iodide composition along the depth, the replacement of iodide ions by bromide ions can be activated under a controlled laser pulse and fluorescence is thus modulated from red to green. The effect of processing depth and NP thickness on fluorescence modulation is systemically investigated. The as-grown thick NP (thickness ≈ 500 nm) mainly exhibits a 690 nm emission from the bottom iodine-rich phase. After halide substitution induced by fs-DLW, a new fluorescence peak appears in the wavelength range of 540-600 nm; the peak position and intensity are controlled by the DLW conditions. The fluorescent color is spatially modulated from red to green, enabling microscale-resolved multicolor emission. Compared with other currently available techniques, microscale color patterning via fs-DLW is a straightforward mask-free one-step operation, yielding high spatial resolution and enabling three-dimensional patterning by the multiple-photon method. We demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.

KW - direct laser writing

KW - femtosecond laser fabrication

KW - fluorescence

KW - gradient band gap

KW - mixed-halide perovskites

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DO - 10.1021/acsami.9b07708

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JF - ACS Applied Materials and Interfaces

SN - 1944-8244

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