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Finally!! It seems my “prayers” have been heard! Recent work (of Gratzel, Sargent and Yuan) shows METHYLAMMONIUM-FREE perovskite materials can give excellent single junction devices with more than 26% PCE: doi.org/10.1038/s41586-024-08103-7 Not formate but acetate is one of the essential additives/components! doi.org/10.3390/molecules29020516 doi.org/10.1007/s43630-023-00500-7 rdcu.be/drNEw

Congratulations !! Thank you for Your step by step presentation. Thanks to YOU it is possibile to understand the topic.

Great lecture!

A very elegant description with Lewis diagrams. Thank you.

Thank you sir for your explanation. Can you please share the ppt? Thanks in advance

What would be the Shockley-Queisser limit with monochromatic light and a single junction solar cell tuned to that frequency?

Great video, will have to watch it a few times

🧞 perovskite 💙🌀🇷🇺🌀💙

Dear Professor I am searching postdoc in solar Cells. Please help me to find a research position. Thank u

Thanks from a peer professor! Great video.

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Thank you for this information of biochemistry’s use of photonic light. I use a device to introduce light & frequency to heal. This is a great explanation- because NO2 is the best way to heal inflammation and pain.

Has FRET ever been experimentally evaluated in a medium with an index of refraction less than one? (FTL phase velocity)

Not long ago I saw a demonstration of a simple organic solar cell (fruit juice on TiO) , it got me really thinking. I took some chemistry before switching to computer science, so I knew you needed molecules with lots of conjugate bonds, and spectra in the energy level above the band gap of the semiconductor electrode. So I thought, I'll just get some peryline green from the art store, mix it up with some aniline, maybe some anthraquinone then turn it into a conductive polymer and I might have something better. I was thinking like why hasn't anyone else thought if it... That's an example of the Dunning Kruger effect. Classic. The more I looked into how to do such a solar cell, the more I learned, the more I realized I still need to learn. I am so glad to have found your channel! Very helpful, clearly understandable and very educational thank you very much! Is there a specific video of yours that specificly covers the energy transfer directly into redox reactions? Any intermediate level reading recommendations for my self education? Ideally I would like to design a system for an organic flow battery where the electrolyte gets charged directly by light, therefore removing many conversion steps, charge controllers & other ancillary electronics.. hence greater reliability simplicity and lower cost (given chemical stability) Seeing now how much more is known and how much more research has been done then I initially thought, I still have to ask why hasn't this already been done? What problem hasn't been solved yet?

Regarding solar cells, with solid state electronics I understand the concept of a "band gap", but I believe with organic chemistry is referred to by different terms and measured in different units , something to do with homo and lumo between the excited states in the absorption & emission spectrum overlaps (I've been thinking of covalently coupling chromophores to conductive polymers) So, my question, _What is the equivalent term in biochemistry and what units does it use?_ I only took a year of chemistry before I switched to computer science so take it easy on me please 😉

Great video. I'm still quite confused on the significance of the different acceptors that Miller and Closs used. Im I know they becoming more electron withdrawing does that make the transfer go quicker?. It appears that a few parameters are being investigated

Would it be right to say that the rate constant of dexter's mechanism inversely proportional to the exponent of the distance between the donor and acceptor while for forster's mechanism; the rate constant is inversely proportional to sixth power of the distance

Thank you so much for your explanation!!

Thank you for your detailed presentation!!

If tesla panel can generate 350 watt how much perovskites panel can generate per watt ?🤔🤔

You explained this concisely and brilliantly, cheers

Professor, excellent lecture! Greetings from the University of Minas Gerais in Brazil. I love the UvA, hope to do a PhD there and have the pleasure of seeing you speak in person.

It was covering all the subjects around it as well and also incredibly brief and to the point. I'm so greatful

Hello Sir , nice explanation. I am also working on Perovskites. There are lot of paper who does defect calculation, they are doing chemical potential phase diagram. Can you provide a tutorial for how to plot a phase diagram..

i thought the direct transition from triplet oxygen to singlet oxygen was spin forbidden?

Thank you very much for your explanations!😍

Very Interesting How can we create that photovoltaic or photodetector device that Aalto University researchers made? 132% efficiency?

what was the software that was used to determine those parameters

Amazing

Great presentation! Thank you for sharing. I had read about Fluorine additive helping improve perovskite stability but I had not heard about the theory of strain relaxation to explain it. Its good to know Zinc and Calcium and other elements could be used too. Vert interesting.

Excellent presentation. Thank you. I have a question, in PDT why do you want to enhance the generation of triplet state with less QY. I mean what is the purpose? I am curious.

It has been a great pleasure to help such a brilliant student to share her talent with the whole world! Flabbergasted by such splendour...

Hi Professor. Always a pleasure to see you explaining the complex perovskite chemistry in a simplified way. Thanks for the lecture. I hope you are doing well.

Thank you so much for your nice lecture. I have a question, how we can consider the molecular orbitals of the octahedral part of perovskites? for instance, [PbBr6]-4, the 5d is completely full, so, we need to consider 6d for interaction? if yes, what its molecular orbital will look like? Thank you, professor.

I listened until 2:18 and it was enough. 1. An excited state is not an exciton (as written later accidents); 2. Dexter (not Dextrer) transfer is not double electron exchange. The orbitals are overlapping before the incident photon comes. 3. There are more than 2 theoretical frameworks for nonradiative energy transfer. 4. Forster and Dexter are not singlet and triplet energy transfer..

omg so relevant for clarice quantum biology

i have been looking for a detailed video on FRET for a very long time! Great to finally have one!!

Great talk

What is the possible commercial values of doping concentration in methyl ammonium tin triiodide perovskite solar cells?

Dear Rene', if I may i have further questions. 1) in this video you focus on that orthogonality is critical for ISC but we need to satisfied another criterion that is the proximity of the energy of the T1 and the C.T orthogonal state, is that right? 2) can in that case of C.T state and T1 state be in equilibrium? or maby C.T state that is singlet and C.T that is triplet? best regards, Yinon.

Cheers!

The requirement for the orthogonality of the D-A groups does not exist in the exited state?(the process is fro LE(1) to CT(1) ) so why focus on the angles in the ground state? best regards, Yinon.

How to understand in ur absorption spectra charge transfer band is there?

Thank You Sir, for sharing such a valuable information video.

I was studying this topic by myself and just found this video. Thank you very much professor, it was very helpfull.

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Interesting!!

Prof René M. Williams your talks are so amazing! thank you!!

Great lecture!!!