Novel organic LED structures based on a highly conductive polymeric photonic crystal electrode

Petti, Lucia; Rippa, Massimo; Capasso, Rossella; Nenna, Giuseppe; Mauro, Anna De Girolamo Del; Maglione, Maria Grazia; Minarini, Carla

doi:10.1088/0957-4484/24/31/315206

Cited by 17 publications

(14 citation statements)

References 32 publications

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“…Yield: 4.96 g (84 %). 1 H NMR (C 6 D 6 ) d: 7.41 (dd, 6H , 4 J 119Sn-1H = 6.3 Hz, 5 J 119Sn-1H = 3.1 Hz, o-C 6 H 5 ), 7.10 (dd, 9H, 3 J 119Sn-1H = 4.8 Hz, 3 J 117Sn-1H = 1.8 Hz,, m,p-C 6 H 5 ), 6.91 (s, 1H, 1 J 119Sn-1H = 1934 Hz, 1 J 117Sn-1H = 1848 Hz, -SnH), ppm; 119 Sn { 1 H} NMR (C 6 D 6 ): d -162.8 ppm. This data is in good agreement with reported literature values [40].…”

Section: Preparation Of Triphenylstannane (F)mentioning

confidence: 99%

“…Yield: 5.03 g (87 %). 1 Compound 6 was prepared in a manner similar to that used for compound 1 above using C (0.25 mmol, 0.67 g) and H (0.50 mmol 0.94 g). Light yellow coloured solid.…”

Section: Preparation Of (Diethylamino)trimethylstannane (H)mentioning

confidence: 99%

“…Yield: 1.85 g (94 %). 1 H NMR (C 6 D 6 ) d: 7.57 (m, 4H, -Sn(o-C 6 H 5 )), 7.02 (m, 6H, -Sn(m,p-C 6 H 5 )), 1.41 (t, 3 J 119Sn-1H = 3 Hz, 18H, -Sn(CH 3 ) 3 ) ppm; 13 …”

Section: Preparation Of (Diethylamino)trimethylstannane (H)mentioning

confidence: 99%

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Linear Oligostannanes: A Synthetic and TD-DFT Study

Harrypersad

Liao

Khan

et al. 2015

J Inorg Organomet Polym

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A series of model linear tristannanes [(( 1 R) 3-Sn) 2 ( 2 R) 2 Sn (1: 1 R = 2 R = n-Bu, 2: 1 R = Ph, 2 R = n-Bu, 3: 1 R = Me, 2 R = n-Bu, 4: 1 R = n-Bu, 2 R = Ph, 5: 1 R = Me, 2 R = Ph, 6: 1 R = n-Bu, 2 R = Me, 7: 1 R = Ph, 2 R = Me)] were prepared by condensation reactions of one equivalent of a dialkyl or diaryl tin diamide or dihydride and two equivalents of a trialkyl or triaryl tin hydride or amide respectively, and characterized by NMR ( 1 H, 13 C, 119 Sn) and UV-Vis spectroscopy, and elemental analysis. An LSDA/SDD level of DFT and TD-DFT for trimers 1-7 predicts significant structural differences as a function and nature of the substituents bound to tin and calculated electronic transitions for these compounds in fair relative agreement with experimental results. Calculated electronic spectra obtained from equivalent DFT studies of the sequentially lengthened oligomers Ph 3 Sn[t-Bu 2 Sn] n SnPh 3 (8-11 where n = 1-4) previously prepared by Dräger are in good agreement with the reported experimental UVVisible spectroscopic and X-ray diffraction data which show a red shift of the r-r* absorption transition (k max ) and bond lengthening and bond angle widening of the central tin atoms as the oligostannane is extended. TD-DFT studies of the alkoxy terminated di(n-butyl) oligostannanes 12a-m (CH 3 CH 2 OCH 2 CH 2 [Sn(n-Bu) 2 ] n CH 2 CH 2 OCH 2 CH 3 ); n = 3-15) indicate lower limiting energy gaps as the polymer chain size is increased. The calculated data deviates significantly from results found experimentally by Sita and suggests that even smaller energy gaps are possible if the polymer (13) resides in an all trans configuration. TD-DFT studies at the LSDA/SDD level were also carried out on a model polystannane 16 (H[SnH 2 ] n H, n = 1-40) to investigate the impact of Sn catenation on the intrinsic band gap of the material and compared to both the Si and Ge analogues 14 and 15 (H[MH 2 ] n H, M = Si, Ge: n = 1-40). The modelling of the polymetallanes reveals the expected limiting energy gap of the r-r* transition in a trans-planar configuration with Sn (2.681 eV) \ Ge (3.096 eV) \ Si (3.719 eV) in good agreement with previous studies by Takeda. Finally, comparison of the TD-DFT calculated data for model alternating oligostannanes (17)(18)(19) with the UV-Vis spectroscopic data for alternating polystannanes (20-22) recently prepared by polycondensation is made.

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Section: Preparation Of Triphenylstannane (F)mentioning

confidence: 99%

“…Yield: 5.03 g (87 %). 1 Compound 6 was prepared in a manner similar to that used for compound 1 above using C (0.25 mmol, 0.67 g) and H (0.50 mmol 0.94 g). Light yellow coloured solid.…”

Section: Preparation Of (Diethylamino)trimethylstannane (H)mentioning

confidence: 99%

See 1 more Smart Citation

Linear Oligostannanes: A Synthetic and TD-DFT Study

Harrypersad

Liao

Khan

et al. 2015

J Inorg Organomet Polym

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“…Photonic crystals are widely used in optoelectronic applications to control light propagation in light emitting diodes [1,2], as anti-reflecting coatings, diffraction gratings and back reflectors in solar cells [3][4][5], resonators in lasers [6,7], and active materials in sensors [8][9][10]. Notwithstanding many top-down and bottom-up fabrication techniques are available [11,12], concurrent high resolution, low cost, and fast production yield over large areas are hardly achievable with standard lithographic methods.…”

Section: Introductionmentioning

confidence: 99%

Nanoimprint Lithography: Toward Functional Photonic Crystals

Lova

Soci

2015

Organic and Hybrid Photonic Crystals

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In this chapter we review the use of nanoimprint lithography and its derivative soft-lithography techniques for the fabrication of functional photonic crystals. Nanoimprint is a viable, scalable, and cost-effective solution for large area patterning. While initially it relied primarily on pattern transfer from a rigid mold to a thermally softened polymer by embossing, in the last two decades the process evolved rapidly, giving rise to new technologies that allow direct imprint of functional materials such as conjugated polymers, metals, biological matter, and metal oxides. These advancements generated increasing interest in the use of nanoimprint lithography for the fabrication of photonic structures for light management in optoelectronic devices. After describing standard nanoimprint lithography and its derivative soft-lithography methods, we briefly discuss nanoimprint capabilities and prospects in photonic applications. In particular we review recent implementations of imprinted photonic structures for light management in organic light emitting diodes, solar cells, solid state lasers and sensors.

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“…Many approaches, including using high-refractiveindex substrates [3,7], microlense arrays [8,9], photonic crystals [10], and plasmonic nanostructures [11], have been studied to enhance g out . Meanwhile, the conventional structure of OLEDs naturally behaves as a weak microcavity because the dimension of their functional layers is similar to the wavelength of the emitting photons.…”

Section: Introductionmentioning

confidence: 99%