Anthracene Crystals Under Intensive Optical Pumping

Avanesjan, O. S.; Benderskiĭ, V. A.; Brikenstein, V. Kh.; Broude, V. L.; Korshunov, L. I.; Lavrushko, A. G.; Tartakovskii, I. I.

doi:10.1080/15421407408083197

Cited by 55 publications

(39 citation statements)

References 7 publications

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“…As an example, in single crystals of anthracene the hole and electron mobilities 9 are approximately 1 cm 2 V Ϫ1 s Ϫ1 and the crystal photoluminescence ͑PL͒ quantum yield at room temperature is almost unity. Both electroluminescence 9 and optically induced lasing 10 have been demonstrated in anthracene single crystals. The possibility to process oligomers into high-purity thin films by vacuum deposition allows the desired geometry for device application to be realized.…”

Section: Department Of Polymer Chemistry and Materials Science Centrementioning

confidence: 99%

Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

Brouwer

Krasnikov

Pham

et al. 1998

Applied Physics Letters

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The influence of the morphology on the light emission properties of vacuum-deposited polycrystalline oligo(p-phenylene vinylene) thin films under intense laser excitation was studied. The morphology of the thin films was varied by annealing just below the first melting point (crystal-mesophase transition) and by crystallization from the isotropic melt. Amplified spontaneous emission occurred within the individual domains and was only observed when the domain size was increased by thermal treatment. The amplified spontaneous emission threshold for the melt-crystallized thin films was found to be comparable to that for conjugated polymer thin films.

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Section: Department Of Polymer Chemistry and Materials Science Centrementioning

confidence: 99%

Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

Brouwer

Krasnikov

Pham

et al. 1998

Applied Physics Letters

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“…In 1974, Avanesjan et al [12] observed the phenomena of optically pumped laser in anthracene crystals. Later, some organic crystals with high quality and large dimension were successfully obtained, along with the gradually mature technology of growing organic single-crystals; then the crystals were used in testing for some important physical phenomena.…”

mentioning

confidence: 98%

Progress on the optoelectronic functional organic crystals

Wang

Xie

et al. 2007

SCI CHINA SER B

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Organic crystals constructed by pi-conjugated molecules have been paid great attention to in the field of organic optoelectronic materials. The superiorities of these organic crystal materials, such as high thermal stability, highly ordered structure, and high carrier mobility over the amorphous thin film materials, make them attractive candidates for optoelectronic devices. Single crystal with definite structure provides a model to investigate the basic interactions between the molecules (supramolecular interaction), and the relationship between molecular stacking modes and optoelectronic performance (luminescence and carrier mobility). Through modulating molecular arrangement in organic crystal, the luminescence efficiency of organic crystal has exceeded 80% and carrier mobility has been up to the level of 10 cm 2 ·V −1 ·s −1 . Amplified stimulated emission phenomena have been observed in many crystals. In this paper, we will emphatically introduce the progress in optoelectronic functional organic crystals and some correlative principle.organic crystals, luminescence, mobility, laser, field effect In the past twenty years, great progress has been made in the field of organic optoelectronic functional materials, such as light-emitting diodes (LEDs) [1 -3] , optically pumped lasers [4,5] , and field-effect transistors (FETs) [6][7][8] . Amorphous semiconductor materials have been extensively investigated because of their operational convenience, since the first high efficiency organic light-emitting diode (OLED) [9] was fabricated by Tang et al. using the vacuum deposition method, and the first organic field-effect transistor (OFET) [10] was fabricated by Tsumura et al. using polythiophene thin film. However, many defects (impurity and structural defects) existing in amorphous materials lead to very low carrier mobility, and then sharply influence the performance of organic semiconductor devices. On the contrary, organic crystals usually present higher mobility, attributed to the very low content of impurity and highly ordered molecule arrangement, as well as highly thermal stability. In recent years, organic single-crystal materials and devices have become a novel investigative hotspot.Scientists have begun to pay attention to the optoelectronic behavior of organic crystals since the 1960s.In the year of 1963, electroluminescence was firstly observed in anthracene single-crystals [11] . In 1974, Avanesjan et al. [12] observed the phenomena of optically pumped laser in anthracene crystals. Later, some organic crystals with high quality and large dimension were successfully obtained, along with the gradually mature technology of growing organic single-crystals; then the crystals were used in testing for some important physical phenomena. For example, the phenomena of amplified spontaneous emission (ASE) were observed in different organic crystals [13][14][15] , which make it possible to realize the electrically pumped laser. Electrically pumped laser requires that the materials must possess high carrier mo-

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“…8 This advantage is due to the inherent long-range structural ordering of these single crystals. Furthermore, there are several examples of stimulated emission, including amplified spontaneous emission [9][10][11][12][13][14] ͑ASE͒, from molecular single crystals. These excellent photonic and electronic features imply the possibility of current-injection lasing.…”

mentioning

confidence: 99%

Photopumped laser oscillation and charge-injected luminescence from organic semiconductor single crystals of a thiophene/phenylene co-oligomer

Ichikawa

Nakamura

Inoue

et al. 2005

Applied Physics Letters

116

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We have demonstrated that single crystals of a thiophene/phenylene co-oligomer ͓␣ , -bis-biphenyl-4-yl-terthiophene ͑BP3T͔͒ show interesting photonic aspects: ͑1͒ the self-waveguided amplified spontaneous light emissions with a comparable low threshold of 8 J/cm 2 to other optimized organic solid-state laser systems, and ͑2͒ the laser oscillation based on the optical self-confinement effect in the crystals. We have also presented electroluminescence from the crystals based on bipolar injection and the crystals' tolerance for intense current driving. These achievements strongly imply that BP3T crystals are a promising candidate for organic laser diodes. © 2005 American Institute of Physics. ͓DOI: 10.1063/1.2138361͔The achievement of long-lasting, bright electroluminescence with high efficiency in both polymeric 1 and lowmolecular-weight organic materials 2 has inspired the development of a new class of laser diodes ͑LDs͒. Within this development, optically induced solid-state organic lasers have been proposed and fabricated based on thin films by methods such as solution casting and vacuum deposition with a wide range of related organic semiconductors. [3][4][5][6][7] As a counterpart of these research streams, crystalline molecular materials also get much attention as promising candidates for organic LDs demanding high-density electric pumping for population inversion. Organic molecular single crystals exhibit superior charge-carrier transport properties to amorphous and polymeric organic semiconductors.8 This advantage is due to the inherent long-range structural ordering of these single crystals. Furthermore, there are several examples of stimulated emission, including amplified spontaneous emission 9-14 ͑ASE͒, from molecular single crystals. These excellent photonic and electronic features imply the possibility of current-injection lasing. However, chargeinjected luminescence from organic single crystals with high stimulated emission properties has not yet been reported. We have achieved optically induced laser oscillation and chargeinjected luminescence from a molecular single crystal. This breakthrough opens up a new research path toward developing organic LDs.The synthesis of a thiophene/phenylene co-oligomer, ␣ , -bis-biphenyl-terthiophene ͑BP3T͒ used can be seen in our previous work. 15 The procedures of the crystal growth were also described in detail elsewhere. 16 The charged pressure of the N 2 +H 2 ͑10 mol %͒ growth gas was −18.6 kPa ͑a differential pressure from the atmosphere͒ at room temperature. The temperature of the growth cylinder was maintained at 360°C at the material-loaded position ͑bottom͒ and 300°C at the growth position ͑top͒ during crystal growth ͑about 150 h͒. The melting temperature of BP3T is 388°C. The source materials of the crystals were highly purified by sublimation in advance. A N 2 -gas laser that generated a light pulse of 500 ps duration at 337 nm was used as an excitation light source for the gain-narrowing experiment. The detailed experimental setup was described in our p...

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Anthracene Crystals Under Intensive Optical Pumping

Cited by 55 publications

References 7 publications

Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

Progress on the optoelectronic functional organic crystals

Photopumped laser oscillation and charge-injected luminescence from organic semiconductor single crystals of a thiophene/phenylene co-oligomer

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