Prof. Felipe A. Larrain Profile

Prof. Felipe A. Larrain

at Georgia Institute of Technology

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Author

Publications (6)

Proceedings Article | 3 October 2022 Presentation

Elastomeric photodetectors enabled by bulk heterojunction with skin-like mechanical properties (Conference Presentation)

Canek Fuentes-Hernández, Youngrak Park, Kyungjin Kim, Wen-Fang Chou, Felipe Larrain, Samuel Graham, Olivier Pierron, Bernard Kippelen

Proceedings Volume PC12210, PC1221009 (2022) https://doi.org/10.1117/12.2632816

KEYWORDS: Photodetectors, Heterojunctions, Semiconductors, Polymers, Optoelectronic devices, Intelligence systems, Transistors, Tissues, Thin films, Skin

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Proceedings Article | 5 March 2021 Presentation

Organic photodetectors reach silicon-level performance

Bernard Kippelen, Canek Fuentes-Hernandez, Oliver Moreno, Wen-Fang Chou, Yi-Chien Chang, Victor Rodriguez Toro, Youngrak Park, Felipe Larrain

Proceedings Volume 11709, 117090C (2021) https://doi.org/10.1117/12.2585823

KEYWORDS: Silicon, Photodetectors, Photodiodes, Biometrics, Visible radiation, Polymers, Organic electronics, Optical sensing, Ionizing radiation, Imaging systems

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Proceedings Article | 20 August 2020 Presentation

Low-noise large-area organic photodiodes

Canek Fuentes-Hernández, Wen-Fang Chou, Victor Rodriguez-Toro, Youngrak Park, Yi-Chien Chang, Felipe Larrain, Bernard Kippelen

Proceedings Volume 11475, 114750N (2020) https://doi.org/10.1117/12.2567668

KEYWORDS: Photodiodes, Biometrics, Silicon, Optical sensing, Ionizing radiation, Photodetectors, Polymers, Heterojunctions, Visible radiation, Custom fabrication

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Proceedings Article | 19 September 2017 Presentation

Recent advances in OLEDs on unconventional substrates (Conference Presentation)

Bernard Kippelen, Xiaoqing Zhang, Canek Fuentes-Hernandez, Felipe Larrain

Proceedings Volume 10362, 1036218 (2017) https://doi.org/10.1117/12.2274304

KEYWORDS: Organic light emitting diodes, Light sources, Electronics, Organic semiconductors, Flexible displays, Manufacturing, Semiconductors, Electronic components, Glasses, Shape memory polymers

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Proceedings Article | 7 November 2016 Presentation

Organic photovoltaic devices with a single layer geometry (Conference Presentation)

Vladimir Kolesov, Canek Fuentes-Hernandez, Naoya Aizawa, Felipe Larrain, Wen-Fang Chou, Alberto Perrotta, Samuel Graham, Bernard Kippelen

Proceedings Volume 9942, 99420U (2016) https://doi.org/10.1117/12.2235869

KEYWORDS: Organic photovoltaics, Polymers, Solar energy, Photovoltaics, Heterojunctions, Coating, Diffusion, Molecules, Sun, Current controlled current source

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Proceedings Article | 3 November 2016 Presentation

Recent advances in organic photodiodes (Conference Presentation)

Bernard Kippelen, Talha Khan, Canek Fuentes-Hernandez, Larissa Diniz, Julia Lukens, Felipe Larrain

Proceedings Volume 9939, 99390L (2016) https://doi.org/10.1117/12.2238199

KEYWORDS: Sensors, Photodiodes, Photodetectors, Photons, CMOS technology, Silicon, Photography, Astronomy, Quantum information, Medical imaging

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Although the detection of photons is ubiquitous, man-made photon detectors still limits the effectiveness of applications such as light/laser detection, photography, astronomy, quantum information science, medical imaging, microscopy, communications, and others. The performance of the technologically most advanced detectors based on CMOS semiconductor technology has improved during the last decades but at the detriment of increased complexity, higher cost, limited portability and compactness, and limited area. On the other hand, nature has produced a relatively simple detector with remarkable properties: the human eye. The exploration of new paradigms in photon detection using new material platforms might therefore provide a path to further challenge the frontiers of applications enabled by light. In this talk, we will report on the realization of solution-processed organic semiconductor visible spectrum photodetectors with a high specific detectivity above 1014 Jones, at least an order of magnitude larger than values found in photodiodes based on silicon. These detectors demonstrate a sub-pA current under reverse bias in the dark, making them suitable for detecting very low levels of light. The small dark current under reverse bias allows the characterization of these devices over 9 orders of magnitude of increasing light irradiance. The detectors are based on the device structure: tin-doped indium oxide / ethoxylated polyethylenimine / poly(3-hexylthiophene) : indene C60 bisadduct / molybdenum oxide / silver and present a path toward fabrication on flexible substrates. We will show that these detectors can operate over a large dynamic range in the self-powered photovoltaic mode where the light produces a photovoltage that can be measured directly without any external bias source. We believe that large-area flexible photodetectors with detectivity values comparable to or better than those displayed by silicon-based photodiodes will enable a wide variety of applications from the detection of radiation to non-planar imaging arrays.

Showing 5 of 6 publications

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