Theoretical insight into the deep-blue amplified spontaneous emission of new organic semiconductor molecules

Ma, Lin; Wu, Zhaoxin; Lei, Ting; Yu, Yue; Yuan, Fang; Ning, Shuya; Jiao, Bo; Hou, Xun

doi:10.1016/j.orgel.2014.08.024

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…The small hump is observed in the emission spectra of compounds 9 c and 9 d . This may be attributed to low frequency vibronic sub‐band, which are widely known as hot‐bands . The degree of charge separation increases in the excited state results in high dipole moment.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Aroylbenzoate‐Based Push‐Pull Molecules for OFET Applications

et al. 2019

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Solution-processable organic semiconductors have attracted great attention in recent years, because of their performance and reliability in potential applications. Here, we report the solution processable donor-acceptor (DÀ A) conjugated molecules comprised of aroylbenzoate as acceptor, triarylamine or methoxyphenyl groups as donor and ethynyl spacer. Molecules with triarylamine donor exhibited strong absorption at 350-380 nm. HOMO levels around 5.5 eV ensures low barrier for hole injection. Optimized geometry and charge distribution over the molecules are visualized by density functional theory (DFT). Organic field effect transistors of these molecules are fabricated with bottom gate-top contact configuration. The devices exhibited charge carrier mobility up to 2.16 × 10 À 3 cm 2 V -1 s -1 and ON/OFF of 10 4 with low threshold voltage of À 3.2 V.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Aroylbenzoate‐Based Push‐Pull Molecules for OFET Applications

et al. 2019

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“…We thus compare our results with the ones obtained in two molecules with the same number of phenyl rings but different lateral substituent (the chemical structures are reported in Figure 6). In particular the BMQ-TPD a diphenyl oligomer with two TPA derivatives [39] does not have lateral substituents while the BPCz, a bisfluorene with terminal biphenylcarbazole units [11,48] have four hexyl alkyl chains, moreover these molecules have terminal groups containing nitrogen and phenyl rings as in F4TPA. The ASE thresholds were reported under nanosecond pumping, from net molecular film in the case of BPCz and from polystyrene blend film for the BMQ-TPD.…”

Section: Resultsmentioning

confidence: 99%

“…The introduction of TPA in OLED active materials has been extensively studied both as a unit in the conjugated backbone [32,33] and as a lateral substituent [34], leading in all cases to considerable improvements in the material [35][36][37][38] performances. Regarding materials for light amplification, the effect of TPA moiety has been instead evaluated only as terminal unit of the main backbone [39] and not yet as lateral substituent.…”

Section: Introductionmentioning

confidence: 99%

Deep Blue Light Amplification from a Novel Triphenylamine Functionalized Fluorene Thin Film

et al. 2019

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The development of high performance optically pumped organic lasers operating in the deep blue still remains a big challenge. In this paper, we have investigated the photophysics and the optical gain characteristics of a novel fluorene oligomer functionalized by four triphenylamine (TPA) groups. By ultrafast spectroscopy we found a large gain spectral region from 420 to 500 nm with a maximum gain cross-section of 1.5 × 10−16 cm2 which makes this molecule a good candidate for photonic applications. Amplified Spontaneous Emission measurements (ASE) under 150 fs and 3 ns pump pulses have revealed a narrow emission at 450 nm with a threshold of 5.5 μJcm−2 and 21 μJcm−2 respectively. Our results evidence that this new fluorene molecule is an interesting material for photonic applications, indeed the inclusion of TPA as a lateral substituent leads to a high gain and consequently to a low threshold blue organic ASE.

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“…But, in a particular microcavity, there are specific modes can be stable in the microcavity. Therefore, microcavities are beneficial to modify the spontaneous emission rates of specific modes and the ASE can be obtained in the microcavities (20). Moreover, the formation of ASE is the simultaneous occurrence of both spontaneous and stimulated emission (21).…”

Section: Theory Of Asementioning

confidence: 99%

Amplified spontaneous emission in distributed feedback active microcavities fabricated by the sol–gel dip-coating method

Wang

Zhang

Song

et al. 2016

Journal of Modern Optics

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2016): Amplified spontaneous emission in distributed feedback active microcavities fabricated by the sol-gel dip-coating method, Journal of Modern Optics, a institute of laser and optoelectronics, college of precision instrument and optoelectronic engineering, tianjin university, tianjin, p.r. china; bKey laboratory of optoelectronic information science and technology (Ministry of education), tianjin university, tianjin, p.r. china ABSTRACT Amplified spontaneous emission (ASE) is demonstrated in a distributed feedback (DFB) active microcavity, formed by rhodamine B molecules in a Bragg grating (BG). The BG was fabricated by alternately depositing titanium dioxide and silicon dioxide sol-gel thin films. The reflectance spectrum of BG simulated by the transfer matrix method was consistent with experimental results, demonstrating that the BG had good periodic structures. With rhodamine B molecules embedded, the ASE was observed from the DFB active microcavity in optical pumped conditions. The full-widthhalf-maximum and threshold of ASE were 7.5 nm and 0.2 mJ/pulse. The slope efficiency of 3% was measured. The DFB active microcavity is promising for low-cost ASE.

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Theoretical insight into the deep-blue amplified spontaneous emission of new organic semiconductor molecules

Cited by 19 publications

References 24 publications

Synthesis of Aroylbenzoate‐Based Push‐Pull Molecules for OFET Applications

Synthesis of Aroylbenzoate‐Based Push‐Pull Molecules for OFET Applications

Deep Blue Light Amplification from a Novel Triphenylamine Functionalized Fluorene Thin Film

Amplified spontaneous emission in distributed feedback active microcavities fabricated by the sol–gel dip-coating method

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