Preparation and time-resolved fluorescence study of RGB organic crystals

Fang, Hong‐Hua; Lu, Shengfu; Wang, Lei; Ding, Ran; Wang, Hai‐Yu; Feng, Jing; Chen, Qi‐Dai; Sun, Hong‐Bo

doi:10.1016/j.orgel.2012.10.028

Cited by 19 publications

(1 citation statement)

References 41 publications

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“…(ii) The large overlap between the photoluminescence (PL) spectrum of DPA and the absorption spectra of guest molecules ensures an efficient energy transfer between host and guest ( Fig. 1C ), thereby enabling the modulation of the degree of Förster resonance energy transfer ( 40 ) and emission color by precisely controlling the molecular doping concentration ( Fig. 1, D and E ).…”

Section: Resultsmentioning

confidence: 99%

Molecular doped, color-tunable, high-mobility, emissive, organic semiconductors for light-emitting transistors

Qin

Gao

et al. 2022

Sci. Adv.

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Developing high-mobility emissive organic semiconductors with tunable colors is crucial for organic light-emitting transistors (OLETs), a pivotal component of integrated optoelectronic devices, but remains a great challenge. Here, we demonstrate a series of color-tunable, high-mobility, emissive, organic semiconductors via molecular doping with a high-mobility organic semiconductor, 2,6-diphenylanthracene, as the host. The well-matched molecular structures and sizes with efficient energy transfer between the host and guest enable the intrinsically high charge transport with tunable colors. High mobility with the highest value >2 cm 2 V −1 s −1 and strong emission with photoluminescence quantum yield >15.8% are obtained for these molecular-doped organic semiconductors. Last, a large color gamut for constructed OLETs is up to 59% National Television System Committee standard, meanwhile with an extremely high current density approaching 326.4 kA cm −2 , showing great potential for full-color smart display, organic electrically pumped lasers and other related logic circuitries.

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Section: Resultsmentioning

confidence: 99%

Molecular doped, color-tunable, high-mobility, emissive, organic semiconductors for light-emitting transistors

Qin

Gao

et al. 2022

Sci. Adv.

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Highly Efficient Three Primary Color Organic Single‐Crystal Light‐Emitting Devices with Balanced Carrier Injection and Transport

Ding

Feng

Dong

et al. 2017

Adv Funct Materials

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Organic single crystals have a great potential in the field of organic optoelectronics because of their advantages of high carrier mobility and high thermal stability. However, the application of the organic single crystals in light‐emitting devices (OLEDs) has been limited by single‐layered structure with unbalanced carrier injection and transport. Here, fabrication of a multilayered‐structure crystal‐based OLED constitutes a major step toward balanced carrier injection and transport by introducing an anodic buffer layer and electron transport layer into the device structure. Three primary color single‐crystal‐based OLEDs based on the multilayered structure and molecular doping exhibit a maximum luminance and current efficiency of 820 cd cm−2 and 0.9 cd A−1, respectively, which are the highest performance to date for organic single‐crystal‐based OLEDs. This work paves the way toward high‐performance organic optoelectronic devices based on the organic single crystals.

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Molecular Self‐Doping Controls Luminescence of Pure Organic Single Crystals

Parashchuk

Mannanov

Konstantinov

et al. 2018

Adv Funct Materials

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Organic optoelectronics calls for materials combining bright luminescence and efficient charge transport. The former is readily achieved in isolated molecules, while the latter requires strong molecular aggregation, which usually quenches luminescence. This hurdle is generally resolved by doping the host material with highly luminescent molecules collecting the excitation energy from the host. Here, a novel concept of molecular self-doping is introduced in which a higher luminescent dopant emerges as a minute-amount byproduct during the host material synthesis. As a one-stage process, self-doping is more advantageous than widely used external doping. The concept is proved on thiophene-phenylene cooligomers (TPCO) consisting of four (host) and six (dopant) conjugated rings. It is shown that <1% self-doping doubles the photoluminescence in the TPCO single crystals, while not affecting much their charge transport properties. The Monte-Carlo modeling of photoluminescence dynamics reveals that host-dopant energy transfer is controlled by both excitonic transport in the host and host-dopant Förster resonant energy transfer. The self-doping concept is further broadened to a variety of conjugated oligomers synthesized via Suzuki, Kumada, and Stille crosscoupling reactions. It is concluded that self-doping combined with improved excitonic transport and host-dopant energy transfer is a promising route to highly luminescent semiconducting organic single crystals for optoelectronics.

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Preparation and time-resolved fluorescence study of RGB organic crystals

Cited by 19 publications

References 41 publications

Molecular doped, color-tunable, high-mobility, emissive, organic semiconductors for light-emitting transistors

Molecular doped, color-tunable, high-mobility, emissive, organic semiconductors for light-emitting transistors

Highly Efficient Three Primary Color Organic Single‐Crystal Light‐Emitting Devices with Balanced Carrier Injection and Transport

Molecular Self‐Doping Controls Luminescence of Pure Organic Single Crystals

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