A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission

Bin Liu; Jinyi Lin; Feng Liu; Mengna Yu; Xinwen Zhang; Ruidong Xia; Tao Yang; Yueting Fang; Linghai Xie; Wei Huang

doi:10.1021/acsami.6b05247

A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission

Bin Liu, Jinyi Lin, Feng Liu, Mengna Yu, Xinwen Zhang, Ruidong Xia, Tao Yang, Yueting Fang, Linghai Xie, Wei Huang

Research output: Contribution to journal › Article › peer-review

78 Scopus citations

Abstract

Bulky conjugated polymers with high crystallinity is the prerequisite for the overall improvement of performance in wide-bandgap semiconductors, including charge transport, photoluminescence quantum yield, processing reliability, and stability. Herein, we report a stable β-phase film of bulky polydiarylfluorene (PODPF) preparing by thermal annealing at ∼220 °C. The β-phase conformation and regular molecular packing are confirmed by UV-vis, photoluminescence (PL), Raman spectra, and grazing incidence X-ray diffraction (GIXD), respectively. Polymer light-emitting diodes (PLEDs) with crystalline and β-phase film serving as the active layer exhibit higher current efficiency of 1.8 cd/A (6.0 V) and more stable electroluminescence over the amorphous one. Surprisingly, mixed conformations in PODPF film produce dually tunable amplified spontaneous emission (ASE) at 463 and 482 nm. Polydiarylfluorenes with quasi-planar conformation will be a promising candidate for the next-generation gain medium toward a broadly tunable lasing and dual-wavelength laser.

Original language	English
Pages (from-to)	21648-21655
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	33
DOIs	https://doi.org/10.1021/acsami.6b05247
State	Published - 24 Aug 2016
Externally published	Yes

Keywords

amplified spontaneous emission
electroluminescence
highly crystalline
polydiarylfluorene
β-phase

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10.1021/acsami.6b05247

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title = "A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission",

abstract = "Bulky conjugated polymers with high crystallinity is the prerequisite for the overall improvement of performance in wide-bandgap semiconductors, including charge transport, photoluminescence quantum yield, processing reliability, and stability. Herein, we report a stable β-phase film of bulky polydiarylfluorene (PODPF) preparing by thermal annealing at ∼220 °C. The β-phase conformation and regular molecular packing are confirmed by UV-vis, photoluminescence (PL), Raman spectra, and grazing incidence X-ray diffraction (GIXD), respectively. Polymer light-emitting diodes (PLEDs) with crystalline and β-phase film serving as the active layer exhibit higher current efficiency of 1.8 cd/A (6.0 V) and more stable electroluminescence over the amorphous one. Surprisingly, mixed conformations in PODPF film produce dually tunable amplified spontaneous emission (ASE) at 463 and 482 nm. Polydiarylfluorenes with quasi-planar conformation will be a promising candidate for the next-generation gain medium toward a broadly tunable lasing and dual-wavelength laser.",

keywords = "amplified spontaneous emission, electroluminescence, highly crystalline, polydiarylfluorene, β-phase",

author = "Bin Liu and Jinyi Lin and Feng Liu and Mengna Yu and Xinwen Zhang and Ruidong Xia and Tao Yang and Yueting Fang and Linghai Xie and Wei Huang",

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T1 - A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission

AU - Liu, Bin

AU - Lin, Jinyi

AU - Liu, Feng

AU - Yu, Mengna

AU - Zhang, Xinwen

AU - Xia, Ruidong

AU - Yang, Tao

AU - Fang, Yueting

AU - Xie, Linghai

AU - Huang, Wei

PY - 2016/8/24

Y1 - 2016/8/24

N2 - Bulky conjugated polymers with high crystallinity is the prerequisite for the overall improvement of performance in wide-bandgap semiconductors, including charge transport, photoluminescence quantum yield, processing reliability, and stability. Herein, we report a stable β-phase film of bulky polydiarylfluorene (PODPF) preparing by thermal annealing at ∼220 °C. The β-phase conformation and regular molecular packing are confirmed by UV-vis, photoluminescence (PL), Raman spectra, and grazing incidence X-ray diffraction (GIXD), respectively. Polymer light-emitting diodes (PLEDs) with crystalline and β-phase film serving as the active layer exhibit higher current efficiency of 1.8 cd/A (6.0 V) and more stable electroluminescence over the amorphous one. Surprisingly, mixed conformations in PODPF film produce dually tunable amplified spontaneous emission (ASE) at 463 and 482 nm. Polydiarylfluorenes with quasi-planar conformation will be a promising candidate for the next-generation gain medium toward a broadly tunable lasing and dual-wavelength laser.

AB - Bulky conjugated polymers with high crystallinity is the prerequisite for the overall improvement of performance in wide-bandgap semiconductors, including charge transport, photoluminescence quantum yield, processing reliability, and stability. Herein, we report a stable β-phase film of bulky polydiarylfluorene (PODPF) preparing by thermal annealing at ∼220 °C. The β-phase conformation and regular molecular packing are confirmed by UV-vis, photoluminescence (PL), Raman spectra, and grazing incidence X-ray diffraction (GIXD), respectively. Polymer light-emitting diodes (PLEDs) with crystalline and β-phase film serving as the active layer exhibit higher current efficiency of 1.8 cd/A (6.0 V) and more stable electroluminescence over the amorphous one. Surprisingly, mixed conformations in PODPF film produce dually tunable amplified spontaneous emission (ASE) at 463 and 482 nm. Polydiarylfluorenes with quasi-planar conformation will be a promising candidate for the next-generation gain medium toward a broadly tunable lasing and dual-wavelength laser.

KW - amplified spontaneous emission

KW - electroluminescence

KW - highly crystalline

KW - polydiarylfluorene

KW - β-phase

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A Highly Crystalline and Wide-Bandgap Polydiarylfluorene with β-Phase Conformation toward Stable Electroluminescence and Dual Amplified Spontaneous Emission

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