Pyry Kivisaari

Electro-Optical Coupling in Double Diode Structures

Nicklas Anttu, Vilgailė Dagytė, Benoît Behaghel, Ivan Radevici, Toufik Sadi, Pyry Kivisaari, Jani Oksanen 2023 Physical Review Applied

Back-Contacted Carrier Injection for Scalable GaN Light Emitters

Iurii Kim, Christoffer Kauppinen, Ivan Radevici, Pyry Kivisaari, Jani Oksanen 2022 Physica Status Solidi (A) Applications and Materials Science

Resonance effects in the radiation transfer of thin-film intracavity devices

Pyry Kivisaari, Jani Oksanen 2022 Applied Physics Letters

Interplay of Photons and Charge Carriers in Thin-Film Devices

Pyry Kivisaari, Mikko Partanen, Toufik Sadi, Jani Oksanen 2021 Physical Review Applied

Geometry Tailoring of Emission from Semiconductor Nanowires and Nanocones

Nicklas Anttu, Henrik Mäntynen, Anastasiia Sorokina, Pyry Kivisaari, Toufik Sadi, Harri Lipsanen 2020 Photonics

Silicon-integrated iii-v light emitters and absorbers using bipolar diffusion

Pyry Kivisaari 2020 Physical Review Applied

Tailored emission to boost open-circuit voltage in solar cells

Nicklas Anttu, Pyry Kivisaari, Yang Chen 2019 Journal of Physics Communications

Simulation of photon transport in resonant double-diode structures

Pyry Kivisaari, Mikko Partanen, Toufik Sadi, Jani Oksanen 2019 Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIII

Towards fully self-consistent optoelectronic simulation of planar devices

Pyry Kivisaari, Toufik Sadi, Mikko Partanen, Jani Oksanen 2019 Optical and Quantum Electronics

Effect of interface recombination on the efficiency of intracavity double diode structures

Toufik Sadi, Ivan Radevici, Pyry Kivisaari, Alberto Casado, Jani Oksanen 2019 Optical and Quantum Electronics

Efficient Fully-Coupled Electro-Optical Simulation Framework for Large-Area Planar Device

Toufik Sadi, Alberto Casado, Ivan Radevici, Pyry Kivisaari, Jani Oksanen 2019 19th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2019

Electroluminescent Cooling in III-V Intracavity Diodes

Toufik Sadi, Ivan Radevici, Pyry Kivisaari, Jani Oksanen 2019 IEEE Transactions on Electron Devices

Emission enhancement, light extraction and carrier dynamics in InGaAs/GaAs nanowire arrays

Pyry Kivisaari, Yang Chen, Nicklas Anttu 2018 NANO FUTURES

Energy Transport in Lossy Resonators by Optical Admittance Methods

Pyry Kivisaari, Mikko Partanen, Jani Oksanen 2018 31st Annual Conference of the IEEE Photonics Society, IPC 2018

Interference-exact radiative transfer simulations

Pyry Kivisaari, Toufik Sadi, Jani Oksanen 2018 18th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2018

Optical admittance method for light-matter interaction in lossy planar resonators

Pyry Kivisaari, Mikko Partanen, Jani Oksanen 2018 Physical Review E

Electroluminescent Cooling in III-V Intracavity Diodes

Toufik Sadi, Ivan Radevici, Pyry Kivisaari, Jani Oksanen 2018 IEEE Transactions on Electron Devices

Electroluminescent cooling in intracavity light emitters

Toufik Sadi, Pyry Kivisaari, Jonna Tiira, Ivan Radevici, Tuomas Haggren, Jani Oksanen 2018 Optical and Quantum Electronics

Electroluminescent cooling using double diode structures

Toufik Sadi, Ivan Radevici, Pyry Kivisaari, Alberto Casado, Jani Oksanen 2018 18th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2018

Optimized efficiency in InP nanowire solar cells with accurate 1D analysis

Yang Chen, Pyry Kivisaari, Mats-Erik Pistol, Nicklas Anttu 2017 Nanotechnology

Diffusion-Driven Charge Transport in Light Emitting Devices

Iurii Kim, Pyry Kivisaari, Jani Oksanen, Sami Suihkonen 2017 Materials

Elimination of Lateral Resistance and Current Crowding in Large-Area LEDs by Composition Grading and Diffusion-Driven Charge Transport

Pyry Kivisaari, Iurii Kim, Sami Suihkonen, Jani Oksanen 2017 Advanced Electronic Materials

Elimination of resistive losses in large-area LEDs by new diffusion-driven devices

Pyry Kivisaari, Iurii Kim, Sami Suihkonen, Jani Oksanen 2017 Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI

On the Monte Carlo Description of Hot Carrier Effects and Device Characteristics of III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jingrui Li, Patrick Rinke, Jani Oksanen 2017 Advanced Electronic Materials

Optimization of Current Injection in AlGaInP Core'Shell Nanowire Light-Emitting Diodes

Pyry Kivisaari, Alexander Berg, Mohammad Amin Karimi, Kristian Storm, Steven Limpert, Jani Oksanen, Lars Samuelson, Haiskan Pettersson, Magnus T. Borgström 2017 Nano Letters

Modeling of charge and photon transport in coupled intracavity light emitters

Toufik Sadi, Pyry Kivisaari, Jonna Tiira, Ivan Radevici, Tuomas Haggren, Jani Oksanen 2017 2017 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)

Intracavity double diode structures with GaInP barrier layers for thermophotonic cooling

Jonna Tiira, Ivan Radevici, Tuomas Haggren, Teemu Hakkarainen, Pyry Kivisaari, Jari Lyytikäinen, Arto Aho, Antti Tukiainen, Mircea Guina, Jani Oksanen 2017 Optical and Electronic Cooling of Solids II

Conduction Band Offset and Polarization Effects in InAs Nanowire Polytype Junctions

I-Ju Chen, Sebastian Lehmann, Malin Nilsson, Pyry Kivisaari, Heiner Linke, Kimberly A. Dick, Claes Thelander 2016 Nano Letters

Optimization of the short-circuit current in an InP nanowire array solar cell through opto-electronic modeling

Yang Chen, Pyry Kivisaari, Mats-Erik Pistol, Nicklas Anttu 2016 Nanotechnology

Monte Carlo study of non-quasiequilibrium carrier dynamics in III–N LEDs

Pyry Kivisaari, Toufik Sadi, Jani Oksanen, Jukka Tulkki 2016 Optical and Quantum Electronics

Incorporation and effects of impurities in different growth zones within basic ammonothermal GaN

Sakari Sintonen, Pyry Kivisaari, Siddha Pimputkar, Sami Suihkonen, Tobias Schulz, James S. Speck, Shuji Nakamura 2016 Journal of Crystal Growth

Two-Photon Absorption in GaAs1-x-yPyNx Intermediate-Band Solar Cells

Henri Jussila, Pyry Kivisaari, Jori Lemettinen, Tooru Tanaka, Markku Sopanen 2015 Physical Review Applied

Bipolar Monte Carlo simulation of electrons and holes in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jani Oksanen, Jukka Tulkki 2015 Gallium Nitride Materials and Devices X, San Francisco, February 09-12, 2015

Bipolar Monte Carlo simulation of hot carriers in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jingrui Li, Vihar Georgiev, Jani Oksanen, Patrick Rinke, Jukka Tulkki 2015 Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD

Bipolar Monte Carlo simulation of hot carriers in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jingrui Li, Vihar Georgiev, Jani Oksanen, Patrick Rinke, Jukka Tulkki 2015 2015 International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2015

Diffusion-driven current transport to near-surface nanostructures

Pyry Kivisaari, Lauri Riuttanen, Sami Suihkonen, Jani Oksanen 2015 Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD

Monte Carlo simulation of hot carrier transport in III-N LEDs

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki, Toufik Sadi 2015 JOURNAL OF COMPUTATIONAL ELECTRONICS

Diffusion injection in a buried multiquantum well light-emitting diode structure

Lauri Riuttanen, Pyry Kivisaari, Olli Svensk, Jani Oksanen, Sami Suihkonen 2015 IEEE Transactions on Electron Devices

Electrical injection to contactless near-surface InGaN quantum well

Lauri Riuttanen, Pyry Kivisaari, Olli Svensk, Jani Oksanen, Sami Suihkonen 2015 Applied Physics Letters

Vertical excitation profile in diffusion injected multi-quantum well light emitting diode structure

Lauri Riuttanen, Pyry Kivisaari, Olli Svensk, Teemu Vasara, Pertti Myllys, Jani Oksanen, Sami Suihkonen 2015 Gallium Nitride Materials and Devices X

Microscopic simulation of hot electron transport in III-N light-emitting diodes

Toufik Sadi, Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2015 Optical and Quantum Electronics

From computational models to improved light-emitting diodes and new devices

Pyry Kivisaari 2014

Monte Carlo-drift-diffusion simulation of electron current transport in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jani Oksanen, Jukka Tulkki 2014 Conference on Physics and Simulation of Optoelectronic Devices XXII, San Francisco, CA, 3-6 February 2014

Monte Carlo simulation of hot electron transport in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jani Oksanen, Jukka Tulkki 2014 Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD

Diffusion injected multi-quantum well light-emitting diode structure

Lauri Riuttanen, Pyry Kivisaari, Henri Nykänen, Olli Svensk, Sami Suihkonen, Jani Oksanen, Jukka Tulkki, Markku Sopanen 2014 Applied Physics Letters

On the correlation of the Auger generated hot electron emission and efficiency droop in III-N light-emitting diodes

Toufik Sadi, Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2014 Applied Physics Letters

University marketized: higher education as a primus motor for growth?

Merkebu Degefa, Nina Heiska, Helena Jin, Anssi Käki, Aqdas Malik, Arsham Mazaheri, Pyry Kivisaari 2013 BIT BANG 5: Changing Global Landscapes - Role of Policy Making and Innovation Capability

Coupled Monte Carlo-drift-diffusion simulation of transport in III-N LEDs

Pyry Kivisaari, Toufik Sadi, Jani Oksanen, Jukka Tulkki 2013 16th IEEE International Workshop on Computational Electronics (IWCE), Nara, Japan, 4-7 June 2013

Current injection to free-standing III-N nanowires by bipolar diffusion

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2013 Applied Physics Letters

Diffusion-assisted current spreading for III-Nitride light-emitting applications

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2013 Photonics West, Physics and Simulation of Optoelectronic Devices XXI,San Francisco, California, USAFebruary 02, 2013

Polarization doping and the efficiency of III-nitride optoelectronic devices

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2013 Applied Physics Letters

Recombination lifetime in InGaN/GaN based light emitting diodes at low current densities by differential carrier lifetime analysis

Lauri Riuttanen, Pyry Kivisaari, Nikolai Mäntyoja, Jani Oksanen, Muhammad Ali, Sami Suihkonen, Markku Sopanen 2013 PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS

Effects of direct lateral Current Injection on the Performance, Overall Efficiency and Emission Distribution in GaN LED structures: a 2D Computational Study

Pyry Kivisaari, Jani Oksanen, Jukka Tulkki 2011 2011 MRS Spring Meeting, San Francisco, California, USA, April 25 - 29, 2011

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