aspuru-list March 2017

aspuru-list@lists.fas.harvard.edu

21 participants
53 discussions

[Aspuru-Guzik Group List] Today, 3pm Div Room, Tony Wu (Postdoc candidate talk)

by Benjamin Sanchez Lengeling

Hi group, Today we have Tony Wu, a postdoc candidate giving a talk at 3 pm, Division room. The talk is has a mix of quantum chemistry, excitonics and materials discovery, hope you can come! His talk title is: *Towards High Efficiency Solar Cell Utilizing Singlet Fission and Triplet-Triplet Annihilation* Abstract: Single bandgap solar cell, such as the conventional silicon solar cell, are bounded by an upper limit of 32% power conversion efficiency (PCE) due to Shockley-Queisser limit. Most of the energy losses comes from non-absorbed lower energy photons and themalization decay loss of higher energy photons. To overcome the Shockley-Queisser PCE limit, down conversion and up conversion mechanisms are some possible methods. We explored the possibility of utilizing singlet fission and triplet-triplet annihilation phenomenon in some organics for energy down conversion and up conversion. We found that internal quantum efficiency for exciton generation reaches 127% for tetracene [1]. For up conversion, the efficiency is about 0.28% [2]. Finally, we would show current progresses toward utilizing singlet fission in silicon solar cell. [1] T. Wu, et al. "Singlet fission efficiency in tetracene-based organic solar cells", APL 2014. [2] T. Wu, et al. "Solid state photon upconversion utilizing thermally activated delayed fluorescence molecules as triplet sensitizer", APL 2015. Ben

7 years, 1 month

[Aspuru-Guzik Group List] Siria Away March 23-27th

by Siria Serrano

Group, Please note that I will be out Thursday, March 23rd to Monday, March 27th and I will not be checking email or work correspondence of any kind while away. Please plan accordingly. All of my planned travel is in the Group's Travel Calendar. Cheers, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 1 month

[Aspuru-Guzik Group List] Pastries in 104A-E

by James Callahan

Afternoon, There are five pastries (may contain nuts) from Flour from an earlier meeting in Mallinckrodt 104A-E by the fridge- first come, first serve! -James

7 years, 1 month

[Aspuru-Guzik Group List] Excitonics Meeting Moved to 2:30 PM Today

by Siria Serrano

Group, Please note that the Excitonics Subgroup Meeting has been moved and will now be taking place *2:30-3:30 PM today*. Best, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 1 month

[Aspuru-Guzik Group List] [Slack is Lying to You] Excitonics Meeting at 1:30 PM NOT 10 AM

by Siria Serrano

Dear all, Excitonics meeting is at *1:30 PM* today not 10 AM. A glitch on the Group calendar feed to Slack has it showing the wrong time. Cheers, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 1 month

[Aspuru-Guzik Group List] FW: Ted Sargent talk

by Catherine M Bourgeois

The Rowland Institute at Harvard presents: Prof. Ted Sargent University Professor, University of Toronto Nanoscale design of materials for the capture and storage of renewable energy Wednesday, March 22, 2016 at 4:00 PM Auditorium, First Floor Host: Haotian Wang Abstract: Tremendous progress in the cost-effective conversion of solar and wind energy into electrical power brings about a new challenge: the massive (seasonal-scale) storage of energy. We focus on using computational materials science, spectroscopies including ultrafast and synchrotron, and advances in materials chemistry, to create new catalysts for CO2 reduction and oxygen evolution. I will discuss recent advances including a new high-activity OER catalyst [1] and a low-overpotential CO2 reduction catalyst based on field-induced reagent concentration [2]. I will also touch on related materials design problems in optoelectronics, including the design of composite organic-inorganic materials for photon-to-electron [3, 4] and electron-to-photon [5, 6] conversion.

7 years, 1 month

[Aspuru-Guzik Group List] ITAMP/HQOC postdoc lunch with Prof. R. Hulet

by Hannes Pichler

Dear postdocs, this Wednesday, March 22nd, we will take this week’s ITAMP/HQOC speaker Randall Hulet out for postdoc lunch at Toscano (52 Brattle St). If you would like to join, please sign up via the following link (limited to 8 people): http://doodle.com/poll/eyuptiv7zpbgmzfy <http://doodle.com/poll/eyuptiv7zpbgmzfy> We will leave from ITAMP at 11:30, but you can also just come straight to the restaurant. Best, Hannes

7 years, 1 month

[Aspuru-Guzik Group List] Postdoc candidate visit: Tony Wu (meeting slots/ talk)

by Benjamin Sanchez Lengeling

Hi group, This wednesday we will have a visiting post doc candidate, Tony Wu from the Marc Baldo group at MIT, he comes from an excitonic device background (organic photovoltaics and OLED) and is interested in materials discovery. *If you want to meet him, I have a few meeting slots available. Also lunch slots.* He will giving a talk on Wednesday, 3-4 pm Division room, titled: *Towards High Efficiency Solar Cell Utilizing Singlet Fission and Triplet-Triplet Annihilation* Abstract: Single bandgap solar cell, such as the conventional silicon solar cell, are bounded by an upper limit of 32% power conversion efficiency (PCE) due to Shockley-Queisser limit. Most of the energy losses comes from non-absorbed lower energy photons and themalization decay loss of higher energy photons. To overcome the Shockley-Queisser PCE limit, down conversion and up conversion mechanisms are some possible methods. We explored the possibility of utilizing singlet fission and triplet-triplet annihilation phenomenon in some organics for energy down conversion and up conversion. We found that internal quantum efficiency for exciton generation reaches 127% for tetracene [1]. For up conversion, the efficiency is about 0.28% [2]. Finally, we would show current progresses toward utilizing singlet fission in silicon solar cell. [1] T. Wu, et al. "Singlet fission efficiency in tetracene-based organic solar cells", APL 2014. [2] T. Wu, et al. "Solid state photon upconversion utilizing thermally activated delayed fluorescence molecules as triplet sensitizer", APL 2015. Hope all is well,

7 years, 1 month

[Aspuru-Guzik Group List] Fwd: Quantum Science Summer School Opportunity

by Alan Aspuru-Guzik

Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M138 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru ---------- Forwarded message ---------- From: Joe Checkelsky <checkelsky(a)mit.edu> Date: Mon, Mar 20, 2017 at 1:56 PM Subject: Fwd: Quantum Science Summer School Opportunity To: "alan(a)aspuru.com" <alan(a)aspuru.com> Dear Alan, I hope this email finds you well. I wanted to send you the electronic version of the flyer we've sent out about the QS3 school this summer. If you would share it with your research group it would be much appreciated! Thanks again for your participation! Best, Joe Begin forwarded message: *From: *qs3 <qs3(a)mit.edu> *Subject: **Quantum Science Summer School Opportunity* *Date: *March 13, 2017 at 3:34:47 PM EDT *To: *colleges_summer_scholars <colleges_summer_scholars(a)mit.edu>, qs3_mailing_list <qs3_mailing_list(a)mit.edu> Greetings! The National Science Foundation and the Department of Energy are sponsoring the Quantum Science Summer School (QS3) program this summer. The program is for graduate students and postdocs in condensed matter, materials, and related fields for the next “quantum revolution.” The aim is to provide students an interactive learning experience with both theoretical and experimental leaders in the field and a connection to a new technology. The 2017 school is focused on Quantum Computing and will be held at Johns Hopkins University. Awards include round-trip travel and attendance expenses. We’d like to ask if you would please post (or forward) the attached flyer where your physics, science and engineering students will see it, or pass it on to an appropriate department for posting. We would be grateful if you would bring it to the attention of your graduate students and postdocs. Students are selected for this highly competitive program based on an application and a recommendation letter. More information about the program and the application to register can be found at QS3.mit.edu <http://qs3.mit.edu/>. If we should update our mailing list with a different person at your school for future mailings about our summer school program, please let us know via email at qs3(a)mit.edu. Thank you for your consideration! Joseph G. Checkelsky Assistant Professor, Department of Physics Massachusetts Institute of Technology Phone: (617) 324-7762 email: checkelsky(a)mit.edu

7 years, 1 month

[Aspuru-Guzik Group List] Lunch with Computational Materials Candidates

by Siria Serrano

Dear Group, As you may already know SEAS is in the midst of recruiting faculty candidates for a Computational Materials position and Alan is part of the selection committee. We have been asked to name a few group members to attend lunch with several of the candidates next week and on April 6th (dates and times below). If you would like to be considered for one of the lunches please email me *directly *with the date(s) and time(s) that works best for you and I will work with SEAS to get people scheduled. March 21st, 1-2PM March 23rd 1-2PM April 6th, 1-2 PM Best regards, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 1 month

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

aspuru-list March 2017