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Lih Lin

  • Professor

Appointments

Professor, Electrical Engineering
Adjunct Professor, Physics

Biography

Lih Y. Lin joined the Electrical Engineering Department at the University of Washington in 2003. She received her Ph.D. in electrical engineering from UCLA. Then she joined AT&T Labs-Research as a Senior Technical Staff Member, working on micromachined technologies for optical switching and lightwave communication systems. In 2000, she joined Tellium, Inc. as director of Optical Technologies to co-lead their R&D effort on high-port-count MEMS optical crossconnects, where she had a sip of telecom start-up frenzy, was gladly terminated and happily found her next home back in academia. Her current research interests are in quantum dot nanophotonics, nanostructure-enhanced laser tweezers, bio-photonics and optical MEMS/NEMS. She has served on the technical program committee and as chair and co-chair of various technical conferences, and has served as guest editor for several journals in the field of photonics. She has over 80 journal publications, over 170 conference papers, 5 book chapters and 32 US patents. Lin was a recipient of the MIT Technology Review Award and a finalist for the IEEE Eta Kappa Nu Outstanding Young Electrical Engineer Award. Lin is a Fellow of IEEE and a member of the Optical Society of America.

Research Interests

Photonics, optical MEMS/NEMS.

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                    [post_content] => [caption id="attachment_11792" align="alignleft" width="482"] NREL senior scientist Joseph Luther and Dr. Erin Sanehira.[/caption]

A collaboration between researchers at the University of Washington Department of Electrical Engineering (UW EE) and the Department of Energy's National Renewable Energy Laboratory (NREL) yields a new world efficiency record for quantum dot solar cells at 13.4 percent.

Quantum dots are incredibly small electronic materials. Ranging from 3 to 20 nanometers in size, they are about one million times smaller than a raindrop.  Because of their size, they possess advantageous optical properties. These properties make them valuable for photovoltaic use, or the process of converting light to electricity (i.e. material used in solar panels).

Researchers have been looking at quantum dots as a source of solar cells for nearly three decades. Their goal has centered around the concept of solar cell efficiency, which refers to the portion of energy in the form of sunlight that can be converted into electricity via photovoltaics. The initial quantum dot solar cells had an efficiency of 2.9 percent. Over the years, researchers have expanded this efficiency to 12 percent through a better understanding of the connectivity between individual quantum dots, better overall device structures and through the reduction of defects in lead sulfide quantum dots.

[caption id="attachment_2299" align="alignright" width="197"] Professor Lih Lin[/caption]

In a recent article, entitled "Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells," researchers reached a new record of 13.4 percent. The article, which was published in the October 17th issue of Science Advances, details the reason behind the higher efficiency. The latest advancement in quantum dot solar cells utilizes a new material - cesium lead triiodide (CsPbI3).

CsPbI3 produces an exceptionally large voltage at open circuit, meaning that is allows a higher portion of sunlight to reach lower layers when paired with the material's bandgap. Voltage and the material's bandgap are two important factors when achieving higher efficiency in a multijunction solar cell.

Multijunction solar cells use different semiconductor materials, which interface between multiple p-n junctions. In the latest advancement, CsPbI3 can be paired with cheap thin-film perovskite materials. The multijunction approach is often used for space applications, where high efficiency is more critical than the cost to make a solar module. The research team's new finding can achieve a similar high efficiency as demonstrated for space solar cells. Built at lower costs than silicon technology, they are ideal for both terrestrial and space applications.

Former UW EE graduate student Erin Sanehira (Ph.D. '17) received a NASA fellowship to work on the research while a student at UW EE. She is first author on the paper. Her advisor, Professor Lih Lin is a Co-PI on the work. For Sanehira, the work expands the potential applications for quantum dot solar cells - from Earth to space.

“Often, the materials used in space and rooftop applications are totally different," Sanehira said in a recent article. "It is exciting to see possible configurations that could be used for both situations.”

Additional authors on the work include NREL researchers Ashley Marshall, Jeffrey Christians, Steven Harvey, Peter Ciesielski, Lance Wheeler, Philip Schulz, Matthew Beard and Co-PI Joseph Luther.

The NREL research was funded as part of the Center for Advanced Solar Photophysics (CASP) an Energy Frontier Research Center funded by the Office of Basic Energy Sciences with the Office of Science of the Department of Energy.
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                    [post_content] => [caption id="attachment_7922" align="aligncenter" width="472"]Assistant Professor of Mechanical Engineering Nicholas Boechler is PI on the grant. Professors of Electrical Engineering Karl Böhringer and Lih Lin are Co-PIs.  Assistant Professor of Mechanical Engineering Nicholas Boechler is PI on the grant. Professors of Electrical Engineering Karl Böhringer and Lih Lin are Co-PIs.[/caption]

Professor of Electrical Engineering and Biomedical Engineering Karl Böhringer, Professor of Electrical Engineering Lih Lin and Assistant Professor of Mechanical Engineering Nicholas Boechler receive a grant from the National Science Foundation (NSF) for the advancement of three-dimensional (3D) printers with unprecedented nanoscale resolution.

Boechler is the PI on the project, entitled “MRI: Acquisition of a Nanoscribe 3D laser lithography system.” Other Co-PIs include: Assistant Professor of Bioengineering Deok-Ho Kim and Assistant Professor of Aeronautics & Astronautics Marco Salviato.

Three-dimensional printing allows researchers to actualize and test their concepts, bringing life to ideas. Current 3D instruments are limited in their resolution. Most existing devices utilize 15 microns. This is about the size of household dust, a particle that can be seen with the naked eye.

Unfortunately, many experimental device and research concepts require the fabrication of 3D structures with nanoscale features. Nanoscale instruments achieve a resolution 100 times smaller than existing 3D printers, achieving degrees of resolution up to 150 nanometers, or the size of the flu virus.

Researchers will utilize in-plane resolution of 150 nanometers and out-of-plane resolution of 1 micron. This diversity in scope allows for ultra-precise and accurate imaging, which delivers to several fields, including medical and surgical imaging.

The development of a Nanoscribe 3D printer will enable new research and discoveries in engineering and science. Examples given by the authors include “new ultra-light materials that can be tailored for energy absorption” and “new clinical therapies and tissue engineering.”

The opportunities of the Nanoscribe printer are vast, including the support of new educational initiatives. Three-dimensional printing has emerged in STEM education both in K-12 and at the collegiate level. Nanotechnology increases the opportunities for STEM students and the participation of underrepresented students.
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                            [post_content] => [caption id="attachment_11792" align="alignleft" width="482"] NREL senior scientist Joseph Luther and Dr. Erin Sanehira.[/caption]

A collaboration between researchers at the University of Washington Department of Electrical Engineering (UW EE) and the Department of Energy's National Renewable Energy Laboratory (NREL) yields a new world efficiency record for quantum dot solar cells at 13.4 percent.

Quantum dots are incredibly small electronic materials. Ranging from 3 to 20 nanometers in size, they are about one million times smaller than a raindrop.  Because of their size, they possess advantageous optical properties. These properties make them valuable for photovoltaic use, or the process of converting light to electricity (i.e. material used in solar panels).

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[caption id="attachment_2299" align="alignright" width="197"] Professor Lih Lin[/caption]

In a recent article, entitled "Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells," researchers reached a new record of 13.4 percent. The article, which was published in the October 17th issue of Science Advances, details the reason behind the higher efficiency. The latest advancement in quantum dot solar cells utilizes a new material - cesium lead triiodide (CsPbI3).

CsPbI3 produces an exceptionally large voltage at open circuit, meaning that is allows a higher portion of sunlight to reach lower layers when paired with the material's bandgap. Voltage and the material's bandgap are two important factors when achieving higher efficiency in a multijunction solar cell.

Multijunction solar cells use different semiconductor materials, which interface between multiple p-n junctions. In the latest advancement, CsPbI3 can be paired with cheap thin-film perovskite materials. The multijunction approach is often used for space applications, where high efficiency is more critical than the cost to make a solar module. The research team's new finding can achieve a similar high efficiency as demonstrated for space solar cells. Built at lower costs than silicon technology, they are ideal for both terrestrial and space applications.

Former UW EE graduate student Erin Sanehira (Ph.D. '17) received a NASA fellowship to work on the research while a student at UW EE. She is first author on the paper. Her advisor, Professor Lih Lin is a Co-PI on the work. For Sanehira, the work expands the potential applications for quantum dot solar cells - from Earth to space.

“Often, the materials used in space and rooftop applications are totally different," Sanehira said in a recent article. "It is exciting to see possible configurations that could be used for both situations.”

Additional authors on the work include NREL researchers Ashley Marshall, Jeffrey Christians, Steven Harvey, Peter Ciesielski, Lance Wheeler, Philip Schulz, Matthew Beard and Co-PI Joseph Luther.

The NREL research was funded as part of the Center for Advanced Solar Photophysics (CASP) an Energy Frontier Research Center funded by the Office of Basic Energy Sciences with the Office of Science of the Department of Energy.
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                            [post_content] => [caption id="attachment_7922" align="aligncenter" width="472"]Assistant Professor of Mechanical Engineering Nicholas Boechler is PI on the grant. Professors of Electrical Engineering Karl Böhringer and Lih Lin are Co-PIs.  Assistant Professor of Mechanical Engineering Nicholas Boechler is PI on the grant. Professors of Electrical Engineering Karl Böhringer and Lih Lin are Co-PIs.[/caption]

Professor of Electrical Engineering and Biomedical Engineering Karl Böhringer, Professor of Electrical Engineering Lih Lin and Assistant Professor of Mechanical Engineering Nicholas Boechler receive a grant from the National Science Foundation (NSF) for the advancement of three-dimensional (3D) printers with unprecedented nanoscale resolution.

Boechler is the PI on the project, entitled “MRI: Acquisition of a Nanoscribe 3D laser lithography system.” Other Co-PIs include: Assistant Professor of Bioengineering Deok-Ho Kim and Assistant Professor of Aeronautics & Astronautics Marco Salviato.

Three-dimensional printing allows researchers to actualize and test their concepts, bringing life to ideas. Current 3D instruments are limited in their resolution. Most existing devices utilize 15 microns. This is about the size of household dust, a particle that can be seen with the naked eye.

Unfortunately, many experimental device and research concepts require the fabrication of 3D structures with nanoscale features. Nanoscale instruments achieve a resolution 100 times smaller than existing 3D printers, achieving degrees of resolution up to 150 nanometers, or the size of the flu virus.

Researchers will utilize in-plane resolution of 150 nanometers and out-of-plane resolution of 1 micron. This diversity in scope allows for ultra-precise and accurate imaging, which delivers to several fields, including medical and surgical imaging.

The development of a Nanoscribe 3D printer will enable new research and discoveries in engineering and science. Examples given by the authors include “new ultra-light materials that can be tailored for energy absorption” and “new clinical therapies and tissue engineering.”

The opportunities of the Nanoscribe printer are vast, including the support of new educational initiatives. Three-dimensional printing has emerged in STEM education both in K-12 and at the collegiate level. Nanotechnology increases the opportunities for STEM students and the participation of underrepresented students.
                            [post_title] => Professors Receive NSF Grant to Develop a 3D Printer that Aids Research in Nanotechnology
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                    [post_content] => [caption id="attachment_11792" align="alignleft" width="482"] NREL senior scientist Joseph Luther and Dr. Erin Sanehira.[/caption]

A collaboration between researchers at the University of Washington Department of Electrical Engineering (UW EE) and the Department of Energy's National Renewable Energy Laboratory (NREL) yields a new world efficiency record for quantum dot solar cells at 13.4 percent.

Quantum dots are incredibly small electronic materials. Ranging from 3 to 20 nanometers in size, they are about one million times smaller than a raindrop.  Because of their size, they possess advantageous optical properties. These properties make them valuable for photovoltaic use, or the process of converting light to electricity (i.e. material used in solar panels).

Researchers have been looking at quantum dots as a source of solar cells for nearly three decades. Their goal has centered around the concept of solar cell efficiency, which refers to the portion of energy in the form of sunlight that can be converted into electricity via photovoltaics. The initial quantum dot solar cells had an efficiency of 2.9 percent. Over the years, researchers have expanded this efficiency to 12 percent through a better understanding of the connectivity between individual quantum dots, better overall device structures and through the reduction of defects in lead sulfide quantum dots.

[caption id="attachment_2299" align="alignright" width="197"] Professor Lih Lin[/caption]

In a recent article, entitled "Enhanced mobility CsPbI3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells," researchers reached a new record of 13.4 percent. The article, which was published in the October 17th issue of Science Advances, details the reason behind the higher efficiency. The latest advancement in quantum dot solar cells utilizes a new material - cesium lead triiodide (CsPbI3).

CsPbI3 produces an exceptionally large voltage at open circuit, meaning that is allows a higher portion of sunlight to reach lower layers when paired with the material's bandgap. Voltage and the material's bandgap are two important factors when achieving higher efficiency in a multijunction solar cell.

Multijunction solar cells use different semiconductor materials, which interface between multiple p-n junctions. In the latest advancement, CsPbI3 can be paired with cheap thin-film perovskite materials. The multijunction approach is often used for space applications, where high efficiency is more critical than the cost to make a solar module. The research team's new finding can achieve a similar high efficiency as demonstrated for space solar cells. Built at lower costs than silicon technology, they are ideal for both terrestrial and space applications.

Former UW EE graduate student Erin Sanehira (Ph.D. '17) received a NASA fellowship to work on the research while a student at UW EE. She is first author on the paper. Her advisor, Professor Lih Lin is a Co-PI on the work. For Sanehira, the work expands the potential applications for quantum dot solar cells - from Earth to space.

“Often, the materials used in space and rooftop applications are totally different," Sanehira said in a recent article. "It is exciting to see possible configurations that could be used for both situations.”

Additional authors on the work include NREL researchers Ashley Marshall, Jeffrey Christians, Steven Harvey, Peter Ciesielski, Lance Wheeler, Philip Schulz, Matthew Beard and Co-PI Joseph Luther.

The NREL research was funded as part of the Center for Advanced Solar Photophysics (CASP) an Energy Frontier Research Center funded by the Office of Basic Energy Sciences with the Office of Science of the Department of Energy.
                    [post_title] => Researchers achieve quantum dot solar cell world record
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Representative Publications

  • Chia-Jean Wang, Ludan Huang, Babak A. Parviz, and Lih Y. Lin, “Sub-diffraction photon guidance by quantum dot cascades,” Nano Letters 6(11): 2549-2553, 2006.
  • Katherine Lugo, Xiaoyu Miao, Fred Rieke, and Lih Y. Lin, “Remote switching of cellular activity and cell signaling using light in conjunction with quantum dots,” Biomedical Optics Express 3(3), 447-454, 2012.
  • Matthew Strathman, Yunbo Liu, Xingde Li, and Lih Y. Lin, “Dynamic focus-tracking MEMS scanning micromirror with low actuation voltages for endoscopic imaging,” Optics Express 21(20): 23934-23941, 2013.
  • Chang-Ching Tu, Ying-Nien Chou, Hsiang-Chieh Hung, Jingda Wu, Shaoyi Jiang, and Lih Y. Lin, “Fluorescent porous silicon biological probes with high quantum efficiency and stability,” Optics Express 22(24):29996-30003, 2014.
  • Peifeng Jing, Jingda Wu, Gary W. Liu, Ethan G. Keeler, Suzie H. Pun, and Lih Y. Lin, “Photonic Crystal Optical Tweezers with High Efficiency for Live Biological Samples and Viability Characterization,” Scientific Reports 6:19924, 2016.
  • Jingda Wu and Lih Y. Lin, “Ultrathin (< 1 μm) Substrate-Free Flexible Photodetector on Quantum Dot-Nanocellulose Paper,” Scientific Reports 7:43898, 2017.
Lih Lin Headshot
Phone206-543-2168
lylin@uw.edu
Web PageClick Here
Mail
M414 EEB

Associated Labs

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Education

  • Ph.D. Electrical Engineering, 1996
    University of California, Los Angeles
  • M.S. Electrical Engineering, 1993
    University of California, Los Angeles
  • MS, Physics, 1992
    National Taiwan University
  • BS, Physics, 1990
    National Taiwan University