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<span style="font-size: 10.5pt; font-family: Arial, "sans-serif"; color: rgb(31, 73, 125);"> ***** Seminar *****</span><br>
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<b><span style="font-size:16.0pt; color:#1F497D">Department of Electrical and Computer Engineering</span></b><span style="font-size:16.0pt; color:#1F497D"></span></p>
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<b><span style="font-size:16.0pt; color:#1F497D">Materials Engineering Program</span></b></p>
<p class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin:0in 0in 0.0001pt; font-size:12pt; font-family:"Times New Roman","serif"; text-align:center">
<b><span style="font-size:14.0pt; color:#1F497D">Texas Center for Superconductivity at Univ. of Houston<br>
</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">Center for Integrated Bio and Nano Systems</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D"> 10:00 a.m., Feb. 18</span></b><b><span style="font-size:14.0pt; color:#1F497D">, 2022</span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D">CBB 122<br>
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<b><span style="font-size:14.0pt; color:#1F497D"></span></b></p>
<p class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin:0in 0in 0.0001pt; font-size:12pt; font-family:"Times New Roman","serif"">
<b><span style="font-size:14.0pt; color:#1F497D">Join Zoom Meeting</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"; color:#1F497D"></span></p>
<p class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin:0in 0in 0.0001pt; font-size:12pt; font-family:"Times New Roman","serif"">
<b><span style="font-size:14.0pt; color:#1F497D"><a href="https://urldefense.com/v3/__https://zoom.us/j/845619943?pwd=QlZvYUV6M2dxNDkvNWxBd3F2YzdJZz09__;!!LkSTlj0I!RY36v8rc0HmWFLiTTBHvwLA0IazEOlQxdQZC1QwuRSdYLO0ZgFA27Y6PryVryUiq6I-G0w$" target="_blank" rel="noopener noreferrer">https://zoom.us/j/845619943?pwd=QlZvYUV6M2dxNDkvNWxBd3F2YzdJZz09</a></span></b></p>
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<b><span style="font-size:14.0pt; color:#1F497D"> </span></b></p>
<p class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin:0in 0in 0.0001pt; font-size:12pt; font-family:"Times New Roman","serif"">
<b><span style="font-size:14.0pt; color:#1F497D">Meeting ID: 845 619 943</span></b></p>
<p class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin-top: 0px; margin-bottom: 0px;margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin-top:0px; margin-bottom:0px; margin:0in 0in 0.0001pt; font-size:12pt; font-family:"Times New Roman","serif"">
<b><span style="font-size:14.0pt; color:#1F497D">Password: 016104 </span></b></p>
<br>
<div class="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_MsoNormal" align="center" style="margin:0px 0in 0.000133333px; font-size:12pt; font-family:"Times New Roman","serif"; text-align:center">
<b><span style="font-size:20.0pt; color:#1F497D"></span></b><b><span style="font-size:20.0pt; color:#1F497D"></span></b><b><span style="font-size:20.0pt; color:#1F497D">
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<span class="x_x_x_A0" style="font-family:MiloOT-Bold; color:rgb(164,25,44); font-style:italic"><b><span style="font-size:20pt; font-family:"Times New Roman","serif"; font-style:normal; color:rgb(31,73,125); background-color:rgba(0,0,0,0)"> Flexible Electronics
Beyond Mechanical Flexibility: Multifunctional Flexible Semiconductor Materials and Devices for Photonic, Electronic, Energy, and Sensing Applications</span></b></span><span class="x_x_x_A0" style="font-family:MiloOT-Bold; color:rgb(164,25,44); font-style:italic"><b><span style="font-size:20pt; font-family:"Times New Roman","serif"; color:rgb(31,73,125); background-color:rgba(0,0,0,0)">
</span></b></span><span class="x_x_x_A0" style="font-family:MiloOT-Bold; color:rgb(164,25,44); font-style:italic"><b><span style="font-size:19.0pt; font-family:"Calibri",sans-serif; font-style:normal"> </span></b></span></p>
</span></b><b><span style="font-size:20.0pt; color:#1F497D"><strong></strong> </span></b><b><span style="font-size:20.0pt; color:#1F497D"></span></b><b><span style="font-size:20.0pt; color:#1F497D">
</span></b><b><span style="font-size:18.0pt; color:#1F497D"></span></b><br>
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<div><b><span style="font-size:18.0pt; color:#1F497D"> </span>
<span style="font-size:18pt; color:rgb(0,0,0); font-family:"Times New Roman",Times,serif">
</span><span style="font-size:18pt; color:rgb(23,78,134); font-family:"Times New Roman",Times,serif"><strong>
<span class="x_x_x_A4" style="font-family:MiloOT-Bold; color:rgb(34,30,31); font-weight:bold">
<span style="font-size:18pt; font-family:"Times New Roman",Times,serif; color:rgb(23,78,134); background-color:rgba(0,0,0,0)">Jae-Hyun Ryou</span></span>
</strong></span><span style="font-size:18.0pt; color:#1F497D"></span></b></div>
<div><span style="font-family:"Times New Roman",Times,serif; font-size:16pt; color:rgb(23,78,134)">
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<span style="font-size:16pt; font-family:"Times New Roman",Times,serif; color:rgb(23,78,134); background-color:rgba(0,0,0,0)"> Department of Mechanical Engineering</span></p>
<div> Materials Science and Engineering Program</div>
<div> Texas Center for Superconductivity at the University of Houston <br>
</div>
<div> (TcSUH)</div>
<div> Advanced Manufacturing Institute (AMI)</div>
</span><span style="font-family:"Times New Roman",Times,serif; font-size:16pt">
<div><span style="color:rgb(23,78,134)">
<span style="font-size:16pt; background-color:rgba(0,0,0,0)">University of Houston<br>
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</span><b><span style="color:rgb(12,100,192)">Abstract</span></b><span style="font-size:11pt; font-family:"Calibri","sans-serif"; color:rgb(12,100,192)">:</span><span style="color:#1F497D"><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">
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<span style="font-size:12.0pt; font-family:"Times New Roman",serif">Flexible electronics is an emerging and widely explored area.<span style="">
</span>Most research groups in the area focus on fabrication processes to provide mechanical flexibility and their use in bendable and stretchable applications.<span style="">
</span>Also, most semiconductors employed in flexible electronics are non-single-crystalline thin films which compromise the performance of the flexible devices.<span style="">
</span>Instead of the conventional process and application developments in flexible electronics, my group studies new flexible single-crystalline semiconductor materials and fundamental device physics of the flexible devices.<span style="">
</span>For the new flexible materials, we developed nearly single-crystalline semiconductor thin films directly deposited on polycrystalline tape substrates.<span style="">
</span>For the extension of device physics, we focus on the interaction between mechanical force and device characteristics, such as changes in electronic band structures, mobilities of free carriers, and quantum efficiencies of energy conversion.
<span style=""> </span>The presentation will cover various topics of flexible photonic, electronic, energy, and sensing devices.<span style="">
</span>The new functionality of flexible devices, material-related technical issues, and state-of-the-art device technology will be described.
<span style=""> </span>Specifically, research topics to be presented include (1) direct growth of high-quality single-crystal-like semiconductor thin films of GaAs and GaN on low-cost flexible metal tapes, (2) flexible high-performance photovoltaic solar cells
and high-electron-mobility transistors on the metal tapes, (3) active piezoelectric polarization engineering of flexible Group III-nitride heterostructures and their electronic and photonic devices for quantum efficiency improvement and device characteristics
tunability, and (4) flexible piezoelectric energy harvesters and sensors for self-powered wearable healthcare monitoring systems such as power generators, and pulse sensors and eye-movement sensors.
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<span style="font-family:"Times New Roman",serif; color:rgb(12,100,192); background-color:rgba(0,0,0,0)"><b><span style="color:rgb(12,100,192); font-family:"Times New Roman",Times,serif">Short Bio</span></b></span><span style="font-family:"Times New Roman",serif; color:rgb(12,100,192); background-color:rgba(0,0,0,0)">:</span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">
Jae-Hyun Ryou received the B.S. and M.S. degrees in Metallurgical Engineering from Yonsei University, Seoul, Korea, and the Ph.D. degree in Materials Science and Engineering in the area of solid-state materials from the University of Texas at Austin, Austin,
TX.</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="color:rgb(12,100,192)">
</span></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">Before joining the University of Houston, he
</span><span style="font-family:"Georgia",serif; color:rgb(12,100,192)">had several R&D positions in both industry and academia,</span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)"> including Honeywell Technology Center,
Honeywell VCSEL Optical Products, Center for Compound Semiconductors at Georgia Institute of Technology.</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="color:rgb(12,100,192)">
</span></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">With research interests in semiconductor materials, nanostructures, and quantum devices, he has been developing new-concept material structures and devices
for photonic, electronic, energy, and sensing applications through materials/device structure modeling/design, epitaxial materials growth by chemical vapor deposition and physical vapor deposition, and fabrication process innovations.</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="color:rgb(12,100,192)">
</span></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">He has authored or co-authored 6 book chapters of books, >200 technical journal papers, and >280 conference presentations, and holds 12 U.S. patents.</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="color:rgb(12,100,192)">
</span></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">He is a member of the Materials Research Society (MRS) and a senior member of the Institute of Electrical and Electronics Engineers (IEEE) and the Optical
Society of America (OSA).</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"><span style="color:rgb(12,100,192)">
</span></span><span style="font-size:12pt; font-family:"Times New Roman",serif; color:rgb(12,100,192)">He served as an associate editor of Optics Express of the OSA.</span><span style="font-size:12.0pt; font-family:"Times New Roman",serif"> </span></p>
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