SF Bay Area Nanotechnology Council


Archive for the ‘Announcements’ Category

Materials Studies of New High Efficiency Solar Absorbers

Monday, March 21st, 2016

TITLE: Materials Studies of New High Efficiency Perovskite Solar Absorbers

SPEAKER: Dr. Mike Toney, SLAC National Accelerator Laboratory & Stanford UniversityDr.Mike Toney

Tuesday, April 19th, 2016  11:30 AM – 1:00  pm
Texas Instruments (TI) Auditorium E-1
2900 Semiconductor Drive
Santa Clara, CA

Admission FREE ($5 donation requested). Please register here.

Cosponsored by IEEE Santa Clara Valley Photovoltaic Section and IEEE Santa Clara Valley Photonics Society


Organic-inorganic halide perovskite films (e.g., methylammonium lead iodide  xrd3 or CH3NH3PbI3) were first employed as light absorbing layers in photovoltaic (PV) devices in 2009, and produced relatively modest power conversion efficiencies (PCEs) of 3.8%.Since then, the development of perovskite solar cells has been meteoric, with PCEs increasing from 3.8% to over 21% in just over five years.

The combination of high extinction coefficients, long charge carrier diffusion lengths and compatibility with low cost, solution-based fabrication processes gives these materials enormous commercial potential.

A significant appeal of CH3NH3PbI3 is their facile synthesis using solution processes. Typically a low temperature anneal (about 100 °C) is involved in film synthesis with subsequent cooling through the cubic-to-tetragonal phase transition near 65 °C. Since the transition temperature is within the range expected in real world device applications, it is therefore important to understand the structural behavior at this transition and its impact on the device performance.

In order to better understand this phase transition in CH3NH3PbI3 thin films, we have developed the capability for operando synchrotron X-ray diffraction by designing a sample stage for simultaneous, temperature dependent measurement of J-V curves and diffraction. This has allowed us to obtain X-ray diffraction data during the operation of CH3NH3PbI3 devices.

 Here I will present detailed structural characterization of the perovskite crystal structure with increasing temperature, including the tetragonal lattice distortion, octahedral rotations associated with the room temperature tetragonal phase, and thermal (disorder) parameters. The impact of these structural changes on the device J-V characteristics will be described and we comment on potential implications for material and device properties.


Michael Toney is head of the Materials Sciences Division and a distinguished staff scientist at the Stanford Synchrotron Radiation Lightsource (SSRL), part of the SLAC National Accelerator Laboratory. He is a pioneer in the use of X-ray diffraction and small angle scattering for the determination of molecular and mesoscale structure of organic and polymeric thin films and for the determination of atomic structure of electrode-electrolyte interfaces. Toney received his BS from Caltech in 1979 and his PhD from the University of Washington in 1983, both in physics. He spend one year as a postdoc at the Risoe National Lab (now DTU) in Denmark, where he participated in some of the first surface X-ray diffraction experiments. He then began working at IBM Almaden Research in materials sciences. He left IBM in 2003 to join SLAC National Accelerator Laboratory and Stanford, where he starting programs in sustainable energy materials.


  • 11:30 am – Registration & light lunch (pizza & drinks)
  • Noon – Presentation & Questions/Answers
  • 1:00 pm – Adjourn
COST: FREE, but a $5 donation is requested to help cover the cost of lunch

Please register here.

Also, visit our Meetup Group.

Bringing Better Pixels to UHD with Quantum Dots

Thursday, November 19th, 2015


Tuesday, December 15, 2015 151215 Charlie Hotz Nanosys Noon – 1  pm
Texas Instruments (TI) Auditorium E-1
2900 Semiconductor Drive
Santa Clara, CA

This seminar is being cosponsored by the Santa Clara Valley Chapter of the IEEE Vehicular Technology Society.


TITLE: Bringing Better Pixels to UHD with Quantum Dots

SPEAKER: Dr. Charlie Hotz, Vice President of R&D, Nanosys



Advances in Quantum Dot chemistry and synthesis have made them an ideal emitter for backlight units in LCDs, with over 25 retail SKUs using Quantum Dots now available ranging from 7” tablet size up to 85” TV size. The next wave of technology innovation in displays is upon us now with Ultra-High Definition, whose most well-known benefit is an increase in resolution from HD to 4K, but there is much more to this new broadcast specification. High dynamic range (HDR) and wide color gamut (WCG) bring more perceptible benefits to users in terms of an improved viewing experience than improved resolution alone.
The ultra-high color gamut standard adopted for UHD broadcast, known as Rec. 2020, was originally defined for laser-based projectors where the color primaries are on the color locus of the CIE diagram. Due to the deeply saturated color coordinates, Rec. 2020 is beyond the capabilities of OLEDs and conventional LED backlit LCDs. So is the Rec. 2020 color standard reachable for consumer displays or is it only for high-end laser-based projection systems? This presentation will explore the capability of using quantum dots in LCDs to reach the ultra-high color gamut of Rec. 2020.

Dr. Charlie Hotz sets the vision for Nanosys’ design, invention of new products and development of existing products. Dr. Hotz has been with Nanosys for 2 years and has developed the company’s large-scale QD synthesis processes and equipment, including working with all the regulatory bodies such as the EPA and local jurisdictions.

Prior to Nanosys, Dr. Hotz was Vice President, R&D for 6 years at Solexant, a QD based photovoltaics company where he develop the first ever high efficiency QD solar cells.  Dr. Hotz also served as Vice President of R&D for 7 years at Quantum Dot Corporation, where he developed many QD products for diagnostic and biological applications which are still in use today at Thermo-Fischer, who acquired Quantum Dot Corporation.  Charlie has a Ph.D. in Chemistry from Michigan.


  • 11:30 am – Registration & light lunch (pizza & drinks)
  • Noon – Presentation & Questions/Answers
  • 1:00 pm – Adjourn

Please RSVP here by Monday December 14 at 5PM.

November 17 Half-Day Fall Symposium: Biomimetic Nanotechnology

Wednesday, October 21st, 2015

Join us for our 11th Annual Half Day Fall Symposium on Biomimetic Nanotechnology

Tuesday Nov 17, 2015
Registration opens: 12:00 PM
Conference: 1:00 PM – 4:30 PM
Texas Instruments (TI) Auditorium E-1
2900 Semiconductor Drive
Santa Clara, CA


Everywhere in nature, nanoscale features enable macro-scale phenomena.
• How is it that geckos can cling to smooth vertical surfaces and never lose their grip?
• What makes butterfly wings iridescent?
• How do chameleons change their hue?
• What keeps lily pads dry in a rainstorm?
The answer is specialized nanostructures!
Come on Nov. 17 and learn about fascinating examples of biomimicry on the nanoscale.

The symposium will also provide a forum for networking and the exchange of information among local academics, students, scientists, engineers, early stage venture capitalists and entrepreneurs who share an interest in nanotechnology and its biomimetic applications.

Speakers Panel


Nanostructured Interfaces for Therapeutic Delivery–Tejal Desai, UC San Francisco

Lessons from Brain Connectivity for Next Gen 3D NanoICs–Jan Rabaey, UC Berkeley

Nanopore Sequencing of DNA Comes of Age–Hugh Olsen and Miten Jain, UC Santa Cruz

A Chameleon-Inspired Stretchable Electronic Skin–Ho-Hsiu Chou, Stanford University

There will also be a student poster session displaying student research in nanotechnology.

Fees (online registration):
IEEE Members: $25
Non-IEEE Members: $35
Unemployed/Between Jobs: $20
Students (with ID): $15
Save $5 with early registration — by November 10th
Add $10 for Registration at the door

Please register here.
Also, visit our Meetup Group.


12:00 Registration Begins
12:30 Networking and Lunch
1:00 Symposium begins

SFBA Nano Wins Outstanding Chapter Award

Thursday, February 6th, 2014

Gold Ribbon canstockphoto2647524The IEEE Region 6 2014 Outstanding Chapter Award was just awarded to our own IEEE San Francisco Bay Area Nanotechnology Council Chapter. (The highest award for IEEE Chapters.)

Region 6 has 228 IEEE Chapters in 12 States. It is the largest IEEE Region and holds about 60,000 members out of the IEEE worldwide total of 430,000 members.

Many of our current Executive Committee have been helping to build this Chapter for the last 10 years and we are pleased to share this recognition with our event attendees, many of whom have participated over that entire time and also contributed in many ways.

Thank you and congratulations to us all.

Nick Massetti
2014 Chair, Executive Steering Committee