Impact of triplet absorption and triplet-singlet annihilation on the dynamics of optically pumped organic solid-state lasers

Lehnhardt, Marcus; Riedl, Thomas; Weimann, T.; Kowalsky, Wolfgang

doi:10.1103/physrevb.81.165206

Cited by 79 publications

(66 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grivas and M. Pollnau: Organic solid-state integrated amplifiers and lasers (STA) [150,[152][153][154][155], which involves energy transfer from a singlet to a triplet exciton. The latter is excited to a higherlying triplet state and then relaxes quickly to the first excited triplet state.…”

Section: Laser and Photonics Reviewsmentioning

confidence: 99%

Organic solid‐state integrated amplifiers and lasers

Grivas

Pollnau

2012

Laser & Photonics Reviews

212

202

View full text Add to dashboard Cite

Solid-state organic amplifiers and lasers are attractive for hybrid integration due to their compatibility with different material platforms, straightforward processing, and possibility to optimize easily their optical and electronic properties by molecular engineering. Advances in the gain medium design and synthesis in combination with new resonator architectures led to tremendous improvements in temporal and spectral properties, lifetime stability, gains produced and operating threshold powers, which triggered interest in their use for a broad range of integrated photonic applications. In this contribution, the current state-of-the-art in the field of organic solid-state amplifiers and lasers is reviewed from the aspects of fabrication technology, gain materials, and device performance. Furthermore, examples of the progress of this technology from a laboratory curiosity to one that demonstrates practical integrated photonic applications are highlighted. An outlook is also provided on research areas and applications that are likely to shape further developments of this technology. (Figure reprinted from [296],

show abstract

Section: Laser and Photonics Reviewsmentioning

confidence: 99%

Organic solid‐state integrated amplifiers and lasers

Grivas

Pollnau

2012

Laser & Photonics Reviews

212

202

View full text Add to dashboard Cite

show abstract

“…As active material solutions we used the conjugated polymers poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(1,4-benzo-{2,1',3}-thiadiazole)] (F8 0.9 BT 0.1 , ADS133YE, American Dye Source, Inc.) and poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1',3}-thia-diazole)] (F8BT, ADS233YE, American Dye Source, Inc.) dissolved in toluene at concentrations of 30 mg/ml for the green emission and a blend of F8 0.9 BT 0.1 or F8BT and the conjugated polymer poly[2-methoxy-5-(2-ethylhexyl-oxy)-1,4-phenylene-vinylene (MEH-PPV, American Dye Source, Inc.) dissolved in toluene at a concentration of 20 mg/ml (85:15 wt%) for the red emission [30]. As laser material emitting in the blue spectral region, we dissolved poly(9-vinylcarbazole) (PVK, Sigma Aldrich), 4,4'-di(N-carbazolyl)biphenyl (CBP, Sigma Aldrich) and 4,4'-bis[(Ncarbazole)styryl]biphenyl (BSB-Cz, own synthesis) in toluene at a concentration of 32 mg/ml (55:37.5:7.5 wt%).…”

Section: Device Design and Fabrication Processesmentioning

confidence: 99%

Continuously tunable solution-processed organic semiconductor DFB lasers pumped by laser diode

Klinkhammer¹,

Liu²,

Huska³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

Abstract:The fabrication and characterization of continuously tunable, solution-processed distributed feedback (DFB) lasers in the visible regime is reported. Continuous thin film thickness gradients were achieved by means of horizontal dipping of several conjugated polymer and blended small molecule solutions on cm-scale surface gratings of different periods. We report optically pumped continuously tunable laser emission of 13 nm in the blue, 16 nm in the green and 19 nm in the red spectral region on a single chip respectively. Tuning behavior can be described with the Bragg-equation and the measured thickness profile. The laser threshold is low enough that inexpensive laser diodes can be used as pump sources. Weimann, J. Wang, and P. Hinze, "Laser threshold reduction in an all-spiro guest-host system," Appl. Phys. Lett. 85(10), 1659-1661 (2004

show abstract

“…However, the rate of TTA may, depending on the nature of the materials, exceed the rate of TPA both in OSSL and OLED. [34][35][36] Due to the lack of experimental data on the TPA of this material and the dominant role of TTA in OSSL as evidenced from the existing literature, 35,36 we did not conduct any additional ab initio investigations of TPA.…”

mentioning

confidence: 99%

Unraveling the Microscopic Origin of Triplet Lasing from Organic Solids

Paul

Banerjee

Paul

et al. 2018

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

We present a heuristic mechanism for the origin of the unusual triplet lasing from (E)-3-(((4-nitrophenyl)imino)methyl)-2H-thiochroman-4-olate·BF.We demonstrate that whereas the moderate lifetime (1.03 μs) of the first triplet state (T) prohibits triplet-triplet annihilation, the relatively faster S → T intersystem crossing and the 10 times smaller reverse intersystem crossing effectively help achieve population inversion in the T state. Furthermore, the triplet lasing wavelength (675 nm) for the tetramer does not overlap with the triplet-triplet absorptions wavelength, indicating that the spin-forbidden emission cross section is very large. Additionally, the almost complete absence of a vibrational progression in the vibronic phosphorescence spectrum of the monomer plays an important role in ensuring efficient triplet-state lasing from this organic material. Our results show that controlling the triplet-state lifetimes combined with lowering of the triplet-triplet absorption in the emission region and small vibronic coupling will be the key steps when designing novel organic triplet-lasing materials.

show abstract

Impact of triplet absorption and triplet-singlet annihilation on the dynamics of optically pumped organic solid-state lasers

Cited by 79 publications

References 35 publications

Organic solid‐state integrated amplifiers and lasers

Organic solid‐state integrated amplifiers and lasers

Continuously tunable solution-processed organic semiconductor DFB lasers pumped by laser diode

Unraveling the Microscopic Origin of Triplet Lasing from Organic Solids

Contact Info

Product

Resources

About