aspuru-list December 2016

aspuru-list@lists.fas.harvard.edu

13 participants
34 discussions

[Aspuru-Guzik Group List] [qip] Looking for a roommate for QIP

by Matthew Coudron

Hi quanta, This is a little late, but I'm also looking for a roommate for QIP. I plan to be around for the whole conference. If there is anyone who's still looking for a roommate, feel free to send me an email and we can coordinate. Best, Matt Coudron _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

7 years, 3 months

[Aspuru-Guzik Group List] FW: Invitation to Attend: Boston Area Excitonics Seminar

by Catherine M Bourgeois

NEW “BOSTON AREA EXCITONICS” Seminar Series: See invitation below. From: Doran Bennett [mailto:bennett.doran@gmail.com] Sent: Tuesday, December 20, 2016 7:10 PM To: Catherine M Bourgeois <cmbourg(a)mit.edu> Subject: Invitation to Attend: Boston Area Excitonics Seminar Dear Excitonics Community of Boston, Christoph Kreisbeck and I are pleased to announce the 'Boston Area Excitonics' seminar series (funded through the Center for Excitonics) will start in the spring of 2017. The general goal is to bring together the many research groups in the Boston area that work on excited state energy transfer - broadly conceived - for an informal set of talks (30-45 minutes in length) primarily to be given by students and post-docs. We hope that this meeting will foster inter-group discussions and collaborations. The first seminar is scheduled for 6pm, Feb. 9th at Harvard (12 Oxford St, Division Room), food will be provided. Subsequent meetings will be held once each month through the academic year. The first speaker of each season will be a faculty member, asked to address both the highlights of their own work and the broad themes for future research they see emerging in their particular sub-space of excitonics. We are lucky to have William Tisdale, the Charles and Hilda Roddey Career Development Professor in Chemical Engineering at MIT, to deliver the inaugural address. If you plan to attend, and we certainly hope you can make time to do so, please note your intention here<https://www.surveymonkey.com/r/GSYFF75>. This will allow us to have a reasonable estimate for the food order. Please feel free to forward this e-mail to anyone who might be interested in attending. We look forward to seeing you in February! Doran and Christoph Doran I. G. Bennett Harvard University, Department of Chemistry CIFAR Postdoctoral Fellow Bio-inspired Light Harvesting Program

7 years, 3 months

[Aspuru-Guzik Group List] Happy Holidays!

by Catherine M Bourgeois

WISHING YOU ALL A WONDERFUL HOLIDAY SEASON! [Image result for happy holidays images funny] CHEERS! Marc and Cathy

7 years, 3 months

[Aspuru-Guzik Group List] Harvard Travel Assist

by Felixander Negron

Good morning, I received some information for the Harvard Travel Assist program and I wanted to pass it along since many of you will be traveling in the near future. Please see information attached or go to the site for more details: https://www.globalsupport.harvard.edu/travel-tools/harvard-travel-assist I will place the membership cards that I received on the table in the war room. Thanks, Felix *Felixander Negron* *Laboratory Administrator * *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-9964** F: **617-496-9411*

7 years, 4 months

[Aspuru-Guzik Group List] FW: Excitonics/Perovskite Seminar: TODAY. Dec 21, 10 AM, 36-462

by Catherine M Bourgeois

TODAY at 10 am! Please post and forward to your groups. CENTER FOR EXCITONICS - PEROVSKITE SEMINAR SERIES PRESENTS: Accelerated testing of organic and perovskite photovoltaics using concentrated sunlight* December 21, 2016 at 10 am in rm: 36-462 Eugene A. Katz Ben-Gurion University of the Negev, Israel/Dept. of Solar Energy and Environmental Physics/ J. Blaustein Institutes for Desert Research, Ilse-Katz Institute for Nanoscale Science and Technology [katz] A significant challenge en route to commercialization of such novel photovoltaic (PV) technologies as organic PV (OPV) and perovskite-based solar cells is the development of devices combining high efficiency and operational stability. While the efficiency can be measured within seconds, the timescale for stability assessment may be of the order of months or years, raising the need for relevant accelerated stability tests. We suggested to use concentrated sunlight for accelerated studies of OPV degradation [1] and demonstrated experimental methodology that allows an independent control of light intensity (up to 4,000 suns) and the sample temperature during the exposure [2]. This allows to study various routs of OPV degradation [3] and to separate light induced mechanisms from those controlled just by the cell temperature. Recently, we used this experimental approach for study of photochemical stability of halide perovskites MAPbX3 films (X = I or Br) [4] and their solid solutions MAPb(I1-xBrx)3 [5]. The relevance of accelerated testing to standard operational conditions of solar cells was confirmed by comparison to degradation experiments under outdoor sunlight exposure. We found that MAPbBr3 films exhibited no degradation, while MAPbI3 and mixed halide films decomposed yielding crystallization of inorganic PbI2 accompanied by degradation of the perovskites' solar light absorption. The rate of such decomposition was found to depend on light intensity, the halide content and the exposure temperature. The crystal coherence length was found to correlate with the stability of the films. 1. T. Tromholt, et al, A. Appl. Phys. Lett. 96, 073501 (2010); A. Manor, E. A. Katz, T. Tromholt and F. C. Krebs. Adv. Energy Mater., 1, 836 (2011). 2. I. Visoly-Fisher, et al, Sol. Energy Mater. Sol. Cells, 134, p. 99-107 (2015). 3. Y. Galagan, et al, Phys. Chem. Chem. Phys., 17, 3891 (2015); 94; E.A. Katz, et al, Sol. Energy Mater. Sol. Cells, 144, 273 (2016).. 4. R. K. Misra, et al, J. Phys. Chem. Lett., 6, 326 (2015). 5. R. K. Misra, et al,. ChemSusChem, 9, 2572 (2016). Eugene A. Katz received his MSc degree in Semiconductor Materials Science in 1982 and Ph. D. in solid state physics in 1990 from the Moscow Institute of Steel and Alloys. He has research experience in field of photovoltaic materials and devices for more than 30 years. The topic of his Ph. D. thesis was "Atomic structure and electronic properties of grain boundaries in polycrystalline silicon solar cells". In 1995, he joined the Ben-Gurion University of the Negev and has been working in the Department for Solar Energy and Environmental Physics ever since (now as a full professor). His research interests include areas of applied solar energy, photovoltaics based on non-traditional semiconductors (fullerenes, nanotubes, conjugated polymers, perovskites), photovoltaic characterization of AIIIBV concentrator solar cells at ultra-high concentration of natural sunlight (up to 10,000 suns) and synthesis of nanomaterials by concentrated sunlight. He has published more than 100 peer-reviewed papers on these topics. In addition, has published a book and articles for broader audiences on the history of science and fullerene-like structures in nanomaterials, living organisms and architecture. *This talk is part of the Perovskites Seminar Series organized by Juan-Pablo Correa-Baena and sponsored by the Center for Excitonics. For more info contact Juan-Pablo: jpcorrea(a)mit.edu<mailto:jpcorrea@mit.edu> The Center For Excitonics Is An Energy Frontier Research Center Funded By The U.S. Department Of Energy, Office Of Science And Office Of Basic Energy Sciences

7 years, 4 months

[Aspuru-Guzik Group List] Excitonics/Perovskite Seminar: TOMORROW. Dec 21, 10 AM, 36-462

by Catherine M Bourgeois

Please post and forward to your groups. CENTER FOR EXCITONICS - PEROVSKITE SEMINAR SERIES PRESENTS: Accelerated testing of organic and perovskite photovoltaics using concentrated sunlight* December 21, 2016 at 10 am in rm: 36-462 Eugene A. Katz Ben-Gurion University of the Negev, Israel/Dept. of Solar Energy and Environmental Physics/ J. Blaustein Institutes for Desert Research, Ilse-Katz Institute for Nanoscale Science and Technology [katz] A significant challenge en route to commercialization of such novel photovoltaic (PV) technologies as organic PV (OPV) and perovskite-based solar cells is the development of devices combining high efficiency and operational stability. While the efficiency can be measured within seconds, the timescale for stability assessment may be of the order of months or years, raising the need for relevant accelerated stability tests. We suggested to use concentrated sunlight for accelerated studies of OPV degradation [1] and demonstrated experimental methodology that allows an independent control of light intensity (up to 4,000 suns) and the sample temperature during the exposure [2]. This allows to study various routs of OPV degradation [3] and to separate light induced mechanisms from those controlled just by the cell temperature. Recently, we used this experimental approach for study of photochemical stability of halide perovskites MAPbX3 films (X = I or Br) [4] and their solid solutions MAPb(I1-xBrx)3 [5]. The relevance of accelerated testing to standard operational conditions of solar cells was confirmed by comparison to degradation experiments under outdoor sunlight exposure. We found that MAPbBr3 films exhibited no degradation, while MAPbI3 and mixed halide films decomposed yielding crystallization of inorganic PbI2 accompanied by degradation of the perovskites' solar light absorption. The rate of such decomposition was found to depend on light intensity, the halide content and the exposure temperature. The crystal coherence length was found to correlate with the stability of the films. 1. T. Tromholt, et al, A. Appl. Phys. Lett. 96, 073501 (2010); A. Manor, E. A. Katz, T. Tromholt and F. C. Krebs. Adv. Energy Mater., 1, 836 (2011). 2. I. Visoly-Fisher, et al, Sol. Energy Mater. Sol. Cells, 134, p. 99-107 (2015). 3. Y. Galagan, et al, Phys. Chem. Chem. Phys., 17, 3891 (2015); 94; E.A. Katz, et al, Sol. Energy Mater. Sol. Cells, 144, 273 (2016).. 4. R. K. Misra, et al, J. Phys. Chem. Lett., 6, 326 (2015). 5. R. K. Misra, et al,. ChemSusChem, 9, 2572 (2016). Eugene A. Katz received his MSc degree in Semiconductor Materials Science in 1982 and Ph. D. in solid state physics in 1990 from the Moscow Institute of Steel and Alloys. He has research experience in field of photovoltaic materials and devices for more than 30 years. The topic of his Ph. D. thesis was "Atomic structure and electronic properties of grain boundaries in polycrystalline silicon solar cells". In 1995, he joined the Ben-Gurion University of the Negev and has been working in the Department for Solar Energy and Environmental Physics ever since (now as a full professor). His research interests include areas of applied solar energy, photovoltaics based on non-traditional semiconductors (fullerenes, nanotubes, conjugated polymers, perovskites), photovoltaic characterization of AIIIBV concentrator solar cells at ultra-high concentration of natural sunlight (up to 10,000 suns) and synthesis of nanomaterials by concentrated sunlight. He has published more than 100 peer-reviewed papers on these topics. In addition, has published a book and articles for broader audiences on the history of science and fullerene-like structures in nanomaterials, living organisms and architecture. *This talk is part of the Perovskites Seminar Series organized by Juan-Pablo Correa-Baena and sponsored by the Center for Excitonics. For more info contact Juan-Pablo: jpcorrea(a)mit.edu<mailto:jpcorrea@mit.edu> The Center For Excitonics Is An Energy Frontier Research Center Funded By The U.S. Department Of Energy, Office Of Science And Office Of Basic Energy Sciences

7 years, 4 months

[Aspuru-Guzik Group List] 7TB Backup space available on frankenstein

by Yun Liu

Hi, Folks, I just want to let you know that a 7.5TB backup space is available on an external hard drive attached to frankenstein in M112. Everyone with an account on frankenstein has access to it. It is currently mounted as two parts: 1. /backup is a 500GB space that is designed to backup the 500GB user data currently stored on frankenstein. It is recommended that everyone makes a subfolder with his own username under /backup and backup his entire home directory to that subfolder (for example, I have a folder /backup/yunl that is backing up my home directory). An example script (backup.sh) for one-click auto backup is attached here: backup.sh #!/bin/bash rsync -anv --delete ~/ /backup/$USER/home &> dryrun.txt rsync -av --delete ~/ /backup/$USER/home &> log.txt & 2. /export is a 7TB space that can be used for storing anything. It is also recommended that you make your own subfolder and throw your data under that subfolder. Note this is not a high performance disks space, therefore please do not try to run calculations that does I/O on those partitions. Happy computing! Yun Liu, Ph.D. Postdoctoral Research Associate Dept. of Chemistry and Chemical Biology Harvard University 12 Oxford Street, Room M111 Cambridge, MA 02138, U.S.A.

7 years, 4 months

[Aspuru-Guzik Group List] [qip] Spring / IAP group meetings

by Aram Harrow

Dear quanta, For the spring, before we get into doodle polls, let me just ask whether 11am or 4pm on Fridays would work again. Can you please let me know if you have conflicts with one or both of those times? Also, if you have thoughts about IAP meetings (pro or con), let me know. In any case we won't meet the week of QIP (Jan 16-20) and I imagine a lot of people will be flying on Fri, Jan 13. But maybe we'll meet in the weeks after QIP. Also, I think it would be nice to do a "QIP preview" in the week before QIP in which we talk about the program. aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

7 years, 4 months

[Aspuru-Guzik Group List] Purchases / Spaces

by Felixander Negron

Good afternoon everyone, I just wanted to send a quick reminder regarding purchases and reimbursements - please make sure to stop by the office in advance and make us aware if you need to make a work-related purchase. Once approved, we will guide you on the best way to make the purchase in order to minimize the waiting period for a reimbursement. Also, please be respectful of your working spaces and make sure to always clean up after yourselves. It is everyone's responsibility to keep our working areas clean and welcoming to our group members and our guests. If there are any questions, please feel free to reach out to me. Thanks, Felix *Felixander Negron* *Laboratory Administrator * *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-9964** F: **617-496-9411*

7 years, 4 months

[Aspuru-Guzik Group List] Materials Sub-Group

by Siria Serrano

Team, If you're in the Materials Sub-Group and/or would like to receive emails for that sub group's meetings please email me directly by the end of the day. 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, 4 months

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aspuru-list December 2016