Prof. Linda A. Peteanu Profile

Prof. Linda A. Peteanu

Professor at Carnegie Mellon Univ

SPIE Involvement:

Conference Program Committee | Author | Student Chapter Advisor | Science Fair Judge

Publications (23)

Proceedings Article | 30 September 2024 Presentation

Solvent-driven helix-coil transitions in chiral conjugated polymers

Linda Peteanu, Megan Rice, Erin Smith, Soren Westrey, Yuyang Shang, Dhruv Sharma, Seth Goldberg, Kevin J. Noonan, Mircea Cotlet, Tomasz Kowalewski

Proceedings Volume PC13127, PC1312707 (2024) https://doi.org/10.1117/12.3028490

KEYWORDS: Polymers, Solid state electronics, Optical properties, Microscopy, Luminescence, Light absorption, Fluorescence, Emissivity, Electrooptics, Electrooptical modeling

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Proceedings Article | 5 October 2023 Presentation

Using the solvation environment to drive the self assembly of conjugated polymers

Linda Peteanu, Stephanie Kramer, Megan Rice, Kevin J. Noonan

Proceedings Volume PC12650, PC126500R (2023) https://doi.org/10.1117/12.2677943

KEYWORDS: Polymers, Emissivity, Quenching, Thin films, Thin film devices, Solid state electronics, Organic optoelectronics, Microscopy

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Proceedings Article | 1 October 2023 Presentation

Solvent-driven helix-coil transitions in emissive chiral conjugated polymers

Linda Peteanu, Megan Rice, Erin Smith, Soren Westrey, Yuyang Shang, Seth Goldberg, Manami Kawakami, Kevin J. Noonan, Tomasz Kowalewski

Proceedings Volume PC12659, PC126590B (2023) https://doi.org/10.1117/12.2677108

KEYWORDS: Polymers, Emissivity, Solid state electronics, Optical properties, Microscopy, Luminescence, Light absorption, Electro optics, Electro optical modeling, Electrical properties

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Proceedings Article | 3 October 2022 Presentation

Solvent-driven helix-coil transitions in chiral conjugated polymers

Linda Peteanu, Megan Rice, Stephanie Kramer, Manami Kawakami, Kevin J. Noonan, Tomasz Kowalewski

Proceedings Volume PC12199, PC121990B (2022) https://doi.org/10.1117/12.2635251

KEYWORDS: Polymers, Luminescence, Absorption, Solid state physics, Microscopy, Magnetic sensors, Dielectrics, Dichroic materials

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Proceedings Article | 5 August 2021 Presentation

Detection, identification, and analysis of multi-emitter polymer systems

Stephanie Kramer, Linda Peteanu

Proceedings Volume 11799, 1179913 (2021) https://doi.org/10.1117/12.2594251

KEYWORDS: Polymers, Luminescence, Fluorescence correlation spectroscopy, Absorption, Solid state physics, Optoelectronics, Diffusion

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Proceedings Article | 2 August 2021 Presentation

The increased photostability of polymers in ambient oxygen via plasmonic enhanced fluorescence

Seth Goldberg, Linda Peteanu

Proceedings Volume 11797, 117971H (2021) https://doi.org/10.1117/12.2594762

KEYWORDS: Polymers, Luminescence, Plasmonics, Oxygen, Metals, Plasmons, Optoelectronic devices, Glasses, Thin films, Solar cells

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Proceedings Article | 2 August 2021 Presentation

Local polarity effects on TADF dynamics as probed by single molecule fluorescence

Linda Peteanu, Rajarshi Chakraborty, Eric Fossum

Proceedings Volume 11808, 118080J (2021) https://doi.org/10.1117/12.2594946

KEYWORDS: Molecules, Luminescence, Lens design, Pollution control, Organic light emitting diodes, Matrices, Light sources and illumination, Excitons, Environmental sensing, Dielectrics

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Proceedings Article | 20 August 2020 Presentation

Photodegradation studies of semi-conductive polymers using plasmonics

Seth Goldberg, Linda Peteanu

Proceedings Volume 11464, 114640N (2020) https://doi.org/10.1117/12.2568757

KEYWORDS: Polymers, Plasmonics, Plasmons, Nanoparticles, Manufacturing, Oxygen, Metals, Luminescence, Optoelectronics, Mechanical engineering

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Proceedings Article | 20 August 2020 Presentation

Photophysical properties of novel photostable helical polyfurans

Stephanie Kramer, Anthony Varni, Kevin J. Noonan, Tomasz Kowalewski, Linda Peteanu

Proceedings Volume 11464, 114640D (2020) https://doi.org/10.1117/12.2567292

KEYWORDS: Optoelectronics, Oxygen, Polymers

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Proceedings Article | 10 September 2019 Presentation

Tuning the photo-physics of molecules for opto-electronic applications using plasmonic and dielectric effects (Conference Presentation)

Linda Peteanu

Proceedings Volume 11093, 110930N (2019) https://doi.org/10.1117/12.2530409

KEYWORDS: Molecules, Optoelectronics, Plasmonics, Dielectrics, Gold, Organic semiconductors, Solid state lighting, Flexible displays, Oxygen, Thin films

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Proceedings Article | 9 September 2019 Presentation + Paper

Effect of local environment on aggregate electronic properties of P3HT

Stephanie Kramer, Linda Peteanu

Proceedings Volume 11084, 110840N (2019) https://doi.org/10.1117/12.2528994

KEYWORDS: Polymers, Absorption, Solid state electronics, Luminescence, Molecules, Molecular aggregates, Optical filters, Fluorescence lifetime imaging, Microscopy, Optoelectronic devices

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Proceedings Article | 17 September 2018 Presentation

Mechanism of ligand-controlled emission in silicon quantum dots (Conference Presentation)

Linda Peteanu, Woong So, Qi Li, Rongchao Jin

Proceedings Volume 10724, 1072419 (2018) https://doi.org/10.1117/12.2321662

KEYWORDS: Quantum dot light emitting diodes, Silicon, Quantum dots, Quantum efficiency, Luminescence, Light emitting diodes, Biosensing, Sensing systems

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Proceedings Article | 17 September 2018 Presentation

P3HT thin film single-molecule and aggregate fluorescence microscopy studies (Conference Presentation)

Stephanie Kramer, Linda Peteanu

Proceedings Volume 10724, 107240Y (2018) https://doi.org/10.1117/12.2320622

KEYWORDS: Thin films, Luminescence, Microscopy, Polymers, Solid state electronics, Light sources and illumination, Organic electronics, Quantum efficiency, Oxygen, Molecules

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Proceedings Article | 29 September 2017 Presentation

Mechanisms underlying emission quenching in conjugated polymers: the role of inter-chain interactions (Conference Presentation)

Linda Peteanu, Eric Wu, Matthew Sfeir

Proceedings Volume 10348, 103480G (2017) https://doi.org/10.1117/12.2272793

KEYWORDS: Polymers, Thin films, Energy transfer, Solar energy, Photovoltaics, Fluorescence correlation spectroscopy, Dynamic light scattering, Diffusion, Molecules, Molecular aggregates

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Proceedings Article | 24 August 2017 Paper

Effects of plasmonic metal films on the emission properties of organic films

Sikandar Abbas, Linda Peteanu

Proceedings Volume 10348, 103481M (2017) https://doi.org/10.1117/12.2274306

KEYWORDS: Gold, Metals, Luminescence, Plasmonics, Polymers, Interfaces, Fluorescence lifetime imaging, Electrodes, Photochemistry, Reflection

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Proceedings Article | 24 August 2017 Paper

Mechanism of fluorescent silicon nanoparticles

Woong Young So, Qi Li, Rongchao Jin, Linda Peteanu

Proceedings Volume 10348, 103481J (2017) https://doi.org/10.1117/12.2273432

KEYWORDS: Silicon, Nanoparticles, Atmospheric particles, Luminescence, Quantum efficiency, Spectroscopy, Absorption, Metals, Americium, System on a chip

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Proceedings Article | 12 October 2016 Presentation + Paper

Effects of plasmonic substrates on the photo-stability of organic polymer

Sikandar Abbas, Linda Peteanu

Proceedings Volume 9923, 992311 (2016) https://doi.org/10.1117/12.2238261

KEYWORDS: Metals, Interfaces, Gold, Luminescence, Polymers, Plasmonics, Microscopy, Organic light emitting diodes, Electrodes, Polymer thin films

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Proceedings Article | 26 September 2016 Paper

The role of local environment on the electronic properties of a novel blue-emitting donor-acceptor compound

Christian Legaspi, Regan Stubbs, David Yaron, Linda Peteanu, Abraham Kemboi, Jesse Picker, Eric Fossum

Proceedings Volume 9923, 99231K (2016) https://doi.org/10.1117/12.2238217

KEYWORDS: Organic light emitting diodes, Matrices, Polymers, Solid state electronics, Lawrencium, Chemistry, Molecules, Lens design, Luminescence, Motion models

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Proceedings Article | 5 September 2015 Paper

Effect of metal films on the photostabilities of emissive organic layers as probed by fluorescence microscopy

Sikandar Abbas, Linda Peteanu

Proceedings Volume 9564, 95640Z (2015) https://doi.org/10.1117/12.2188530

KEYWORDS: Gold, Polymers, Oxygen, Luminescence, Thin films, Glasses, Metals, Microscopy, Organic light emitting diodes, Electroluminescence

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Proceedings Article | 20 August 2015 Presentation + Paper

Dynamic features of rod-shaped Au nanoclusters

Woong Young So, Anindita Das, Shuxin Wang, Shuo Zhao, Hee Young Byun, Dana Lee, Santosh Kumar, Rongchao Jin, Linda Peteanu

Proceedings Volume 9549, 95491D (2015) https://doi.org/10.1117/12.2185773

KEYWORDS: Gold, Luminescence, Chemical species, Molecules, Chemistry, Quantum efficiency, Spherical lenses, Silver, Polymers, Nanorods

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Proceedings Article | 20 August 2015 Paper

Modeling electric field-induced quenching in conjugated polymers and oligomers

Christian Legaspi, Linda Peteanu, David Yaron

Proceedings Volume 9549, 95490D (2015) https://doi.org/10.1117/12.2188620

KEYWORDS: Polymers, Excitons, Systems modeling, Quenching (fluorescence), Dielectrics, Organic light emitting diodes, Molecules, Luminescence, Chemistry, Statistical modeling

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The phenomenon of electric field-induced emission quenching is important in organic light-emitting diodes because operating conditions involve large electric fields. Past experimental work on light-emitting polymers and oligomers showed that field-induced quenching (FIQ) efficiencies are higher in non-rigid molecules such as poly(pphenylene vinylene) or PPV, than in similar, more planar molecules. Based on this relationship, we previously proposed that the applied field enhances internal conversion decay channels. Our further studies built on this idea by examining FIQ in PPV oligomers of varying length using computational methods. Calculations performed at the INDO/S-CI level showed the presence of free electron-hole pair (FEHP) states which are stabilized by the uniform external electric field. These FEHP states undergo an avoided crossing with the fluorescent 1B_u bound exciton state at sufficiently high field magnitudes. The magnitude of the electronic coupling between the FEHP and 1B_u state, determined from these avoided crossings, is found to be a function of the field at which these states cross. This function is universal in that it applies to all FEHP states in PPV. This includes FEHP states on different length oligomers and the multiple FEHP states on a given length oligomer. Combining this universal function with simple models for the surrounding dielectric medium and effects of disorder allowed Marcus theory to be used to develop a model of FIQ. The resulting model yields reasonable quantitative agreement with FIQ magnitudes, dependence on oligomer length, and threshold field strengths at which quenching is observed. Here, the universal curve, relating electronic coupling to the field at which the FEHP and 1B_u states cross, is examined for planar, ordered oligomers of polyfluorene and ladder-type poly(p-phenylene). The dependence is similar to PPV, suggesting that this curve is universal not just across states, but also across this family of conjugated polymers. Given that the electronic couplings are similar, the observed differences in FIQ may be attributed to other factors, including especially the reduced degree of structural disorder present for these more rigid systems.

Proceedings Article | 20 August 2015 Paper

Electronic and optical properties of novel carbazole-based donor-acceptor compounds for applications in blue-emitting organic light-emitting diodes

Christian Legaspi, Regan Stubbs, David Yaron, Linda Peteanu, Matthew Sfeir, Abraham Kemboi, Jesse Picker, Eric Fossum

Proceedings Volume 9549, 95491M (2015) https://doi.org/10.1117/12.2188634

KEYWORDS: Organic light emitting diodes, Absorption, Optical properties, Oscillators, Polymers, Luminescence, Quantum efficiency, Dielectrics, Spectroscopy, Absorption spectroscopy

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Proceedings Article | 9 September 2014 Paper

The optical properties of conjugated materials and their aggregates: towards imaging of films and devices

Linda Peteanu, Jiyun Hong, SuKyung Jeon, Janice Kim, Diane Devi, Jurjen Wildeman, Matthew Sfeir, James Werner, Andrew Shreve

Proceedings Volume 9165, 91650L (2014) https://doi.org/10.1117/12.2063460

KEYWORDS: Fluorescence lifetime imaging, Polymers, Microscopy, Luminescence, Picosecond phenomena, Gold, Optical properties, Chromophores, Solar energy, Nanomaterials

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