Plenary Event
Organic Photonics + Electronics Plenary
23 August 2022 • 9:15 AM - 11:50 AM PDT | Conv. Ctr. Room 6A
Session Chair: Ifor D. W. Samuel, Univ. of St. Andrews (United Kingdom)
9:15 AM - 9:20 AM: Welcome and Opening Remarks
9:20 AM - 9:50 AM: Thin-film solution-processed multijunction solar cells
René A.J. Janssen, Technische Univ. Eindhoven (Netherlands)
Power conversion efficiencies of organic and metal halide perovskite solar cells are closing the gap to crystalline silicon. A unique property of these materials is their widely tunable optical bandgap. By combining different bandgap materials in multijunction solar cells thermalization and transmission losses can be reduced. Recent progress on tandem, triple, and quadruple junction solar cell based on organic and perovskite semiconductors will be presented. Efficiency records for these thin films solar cells presently exceed 25% and while 30%-efficient cells seem within reach, developing cells towards efficiencies of 35% based on cheap materials and affordable technologies is a tremendous challenge and defines a target for future research.
René Janssen is a university professor in chemistry and physics at the Eindhoven University of Technology. His current research is focused on developing, understanding, and applying novel molecular semiconductor materials. This work combines synthesis, optical spectroscopy, electrochemistry, and morphological studies with the design, fabrication, and characterization of optoelectronic devices.
9:50 AM - 10:00 AM: Q&A
Coffee Break 10:00 AM - 10:30 AM
10:30 AM - 11:00 AM: Can solution-processed organic thin-film transistors enable ubiquitous electronics?
Oana D. Jurchescu, Wake Forest Univ. (United States)
Organic semiconductor devices are expected to become present in many sectors of our lives due to their low-cost, lightweight, versatility and ease of molding into any shape. Their solution processing offers exciting opportunities of incorporating electronics in unconventional technologies that could augment traditional applications. The organic thin-film transistors have been used for decades both as active circuit elements and testbeds for material development. Their performance depends on the organic semiconductor film morphology, quality of the various device interfaces and the device architecture. In this presentation I will discuss the lessons we learned as a field about device design and processing, and the limitations we currently face in optimizing charge injection and transport.
Oana D. Jurchescu is a Baker Professor of Physics at Wake Forest University in Winston-Salem, NC, USA and a fellow of the Royal Society of Chemistry. She received her PhD in 2006 from University of Groningen, the Netherlands, and then was a postdoctoral researcher at the National Institute of Standards and Technology in Gaithersburg, MD. Her expertise is in charge transport in organic and organic/inorganic hybrid semiconductors, device physics and semiconductor processing. Read more about Dr. Jurchescu in her interview with SPIE here.
11:00 AM - 11:10 AM: Q&A
11:10 AM - 11:40 AM: Designing room temperature quantum materials through quantum analog of vibration isolation
Kenan Gundogdu, North Carolina State Univ. (United States)
As the demand for quantum approaches in computing, communication and cryptology is increasing, the need for discovering new “quantum materials” is at an unprecedented level. While for most applications the required quantum properties are known, the designer rules for producing these materials are not clear and quantum materials functioning at room temperature is almost non-existent. Quantum coherence, i.e., the phase stability of a superposition state, is the fundamental requirement for quantum applications. Similarly, macroscopic quantum phenomena such as superconductivity superfluorescence and Bose-Einstein condensation, require a collectively coherent phase in an ensemble. Because quantum phase is extremely fragile under thermal excitations, these phenomena and their utilization in quantum technologies is limited to cryogenic conditions. Based on our recent discovery of room temperature superfluorescence in hybrid perovskites, we believe that it is possible to protect the quantum phase of a quantum system by isolating it from ambient thermal interactions by using a mechanism similar to vibrational isolation in classical mechanical systems. We call this process Quantum Analog of Vibration Isolation-“QAVI”. In this presentation, I will introduce QAVI using our recent experimental results on room temperature superfluorescence in hybrid perovskite thin films, and my perspective for designing quantum materials at high temperatures.
Professor Kenan Gundogdu received his Ph.D. in 2004 from the University of Iowa. He continued his postdoctoral studies at the University of Iowa between 2004-06 and at the Massachusetts Institute of Technology between 2006-08. Since then he has been a faculty member in the physics department at North Carolina State University. Gundogdu’s research program focuses on the investigation of electronic processes in condensed matter systems such as organic and hybrid materials using ultrafast optical spectroscopy. He specifically focuses on understanding material properties that lead to extended electronic coherence in solids and observation of macroscopic quantum states at practically high temperatures.
11:40 AM - 11:50 AM: Q&A
9:15 AM - 9:20 AM: Welcome and Opening Remarks
9:20 AM - 9:50 AM: Thin-film solution-processed multijunction solar cells
René A.J. Janssen, Technische Univ. Eindhoven (Netherlands)
Power conversion efficiencies of organic and metal halide perovskite solar cells are closing the gap to crystalline silicon. A unique property of these materials is their widely tunable optical bandgap. By combining different bandgap materials in multijunction solar cells thermalization and transmission losses can be reduced. Recent progress on tandem, triple, and quadruple junction solar cell based on organic and perovskite semiconductors will be presented. Efficiency records for these thin films solar cells presently exceed 25% and while 30%-efficient cells seem within reach, developing cells towards efficiencies of 35% based on cheap materials and affordable technologies is a tremendous challenge and defines a target for future research.
René Janssen is a university professor in chemistry and physics at the Eindhoven University of Technology. His current research is focused on developing, understanding, and applying novel molecular semiconductor materials. This work combines synthesis, optical spectroscopy, electrochemistry, and morphological studies with the design, fabrication, and characterization of optoelectronic devices.
9:50 AM - 10:00 AM: Q&A
Coffee Break 10:00 AM - 10:30 AM
10:30 AM - 11:00 AM: Can solution-processed organic thin-film transistors enable ubiquitous electronics?
Oana D. Jurchescu, Wake Forest Univ. (United States)
Organic semiconductor devices are expected to become present in many sectors of our lives due to their low-cost, lightweight, versatility and ease of molding into any shape. Their solution processing offers exciting opportunities of incorporating electronics in unconventional technologies that could augment traditional applications. The organic thin-film transistors have been used for decades both as active circuit elements and testbeds for material development. Their performance depends on the organic semiconductor film morphology, quality of the various device interfaces and the device architecture. In this presentation I will discuss the lessons we learned as a field about device design and processing, and the limitations we currently face in optimizing charge injection and transport.
Oana D. Jurchescu is a Baker Professor of Physics at Wake Forest University in Winston-Salem, NC, USA and a fellow of the Royal Society of Chemistry. She received her PhD in 2006 from University of Groningen, the Netherlands, and then was a postdoctoral researcher at the National Institute of Standards and Technology in Gaithersburg, MD. Her expertise is in charge transport in organic and organic/inorganic hybrid semiconductors, device physics and semiconductor processing. Read more about Dr. Jurchescu in her interview with SPIE here.
11:00 AM - 11:10 AM: Q&A
11:10 AM - 11:40 AM: Designing room temperature quantum materials through quantum analog of vibration isolation
Kenan Gundogdu, North Carolina State Univ. (United States)
As the demand for quantum approaches in computing, communication and cryptology is increasing, the need for discovering new “quantum materials” is at an unprecedented level. While for most applications the required quantum properties are known, the designer rules for producing these materials are not clear and quantum materials functioning at room temperature is almost non-existent. Quantum coherence, i.e., the phase stability of a superposition state, is the fundamental requirement for quantum applications. Similarly, macroscopic quantum phenomena such as superconductivity superfluorescence and Bose-Einstein condensation, require a collectively coherent phase in an ensemble. Because quantum phase is extremely fragile under thermal excitations, these phenomena and their utilization in quantum technologies is limited to cryogenic conditions. Based on our recent discovery of room temperature superfluorescence in hybrid perovskites, we believe that it is possible to protect the quantum phase of a quantum system by isolating it from ambient thermal interactions by using a mechanism similar to vibrational isolation in classical mechanical systems. We call this process Quantum Analog of Vibration Isolation-“QAVI”. In this presentation, I will introduce QAVI using our recent experimental results on room temperature superfluorescence in hybrid perovskite thin films, and my perspective for designing quantum materials at high temperatures.
Professor Kenan Gundogdu received his Ph.D. in 2004 from the University of Iowa. He continued his postdoctoral studies at the University of Iowa between 2004-06 and at the Massachusetts Institute of Technology between 2006-08. Since then he has been a faculty member in the physics department at North Carolina State University. Gundogdu’s research program focuses on the investigation of electronic processes in condensed matter systems such as organic and hybrid materials using ultrafast optical spectroscopy. He specifically focuses on understanding material properties that lead to extended electronic coherence in solids and observation of macroscopic quantum states at practically high temperatures.
11:40 AM - 11:50 AM: Q&A