Possibility of laser emission from excimers and exciplexes of aromatic compounds

Krashakov, S. A.; Uzhinov, B. M.

doi:10.1070/qe1982v012n11abeh006184

Cited by 2 publications

(2 citation statements)

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“…This has been attributed to the partial forbiddance of the radiative transitions from the excited to the ground state, which leads to long lifetimes of the excited states, a small fluorescence rate, and a small cross-section of stimulated emission. [14][15][16] However, this situation can be changed if the organic heterojunctions are modified by plasmonic nanostructures, which is the main motivation for the experimental work presented here.…”

Section: Introductionmentioning

confidence: 99%

Stimulated emission within the exciplex band by plasmonic-nanostructured polymeric heterojunctions

Wang

Liu

2015

Nanoscale

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Organic heterojunctions have been extensively employed in the design of light-emitting diodes, photovoltaic devices, and thin-film field-effect transistors, which can be achieved by constructing a bilayer or a multi-layered thin-film deposition, or by blending two or more organic semiconductors with different charge-transport performances. Charge transfer excited states or exciplex may form on the heterointerfaces. Efficient light-emitting diodes have been demonstrated using exciplex emission. However, lasing or stimulated emission processes have not been observed with exciplex formation at organic heterojunctions. In this work, we demonstrate strong coherent interaction between photons and exciplex formation in the blends of poly-9,9'-dioctylfluorene-co-bis-N,N'-(4-butylphenyl)-bis-N,N'-phenyl-l,4-phenylenediamine (PFB) and poly-9,9'-dioctylfluorene-co-benzothiadiazole (F8BT), leading to transient stimulated exciplex emission. The responsible mechanisms involve plasmonic local-field enhancement and plasmonic feedback in a three-dimensional gold-nanoparticle matrix.

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Section: Introductionmentioning

confidence: 99%

Stimulated emission within the exciplex band by plasmonic-nanostructured polymeric heterojunctions

Wang

Liu

2015

Nanoscale

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“…13 The radiative transition in exciplexes is partially forbidden, therefore, the generation of laser radiation by the products of electron phototransfer reactions and, consequently, photochemical lasers based on these reactions are hardly probable. 14 The radiative transition in excited products of numerous proton phototransfer reactions is permitted. 15 These excited products are the potential generators of the laser radiation.…”

Section: Introductionmentioning

confidence: 99%