Rasmus Svejstrup Nielsen
@nielsen_rs
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Very happy to see our latest work in which we demonstrate the first monolithic selenium/silicon tandem solar cell published in PRX Energy!
journals.aps.org
Experiment and device simulation are combined to explore a monolithically integrated selenium/silicon tandem solar cell, offering insights toward positioning tandem solar cells as strong contenders...
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The experimental parts of the study are supported by @Carlsbergfondet (Grant No. CF24-0200) and @GrundforskFond (Grant No. 0217-00333B).
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Not all defects are killers! 🔬 Our combined theory-experiment study shows an intrinsic point defect tolerance in trigonal selenium, suggesting interface and extended defects to limit performance. Selenium is still in the game for tandem and indoor PV! ☀️⚡
pubs.rsc.org
Selenium has reemerged as a promising absorber material for tandem and indoor photovoltaic (PV) devices due to its elemental simplicity, unique structural features, and wide band gap. However,...
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RT @Kavanagh_Sean_: Our work on the intrinsic & extrinsic (dopant) defect chemistry of trigonal Selenium, for indoor and tandem PV solar ce….
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RT @PhysRevB: PRB Editors' Suggestion: Variable-temperature and carrier-resolved #PhotoHallMeasurements of high-performance #selenium #Thin….
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Supported by @Carlsbergfondet (Grant No. CF24-0200) and @GrundforskFond (Grant No. 0217-00333B).
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Determining "simple" material properties is not a simple task! We combine carrier-resolved photo-Hall measurements with other advanced characterization techniques and device simulations to resolve reported discrepancies in selenium thin films! 🔬 ☀️ ⚡.
journals.aps.org
Selenium is a promising absorber material for the next generation of solar cells, but unlocking its full potential requires a deeper understanding of both the minority and majority charge carriers....
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RT @PRX_Energy: Copper chalcopyrites, including CIGS, are promising for more efficient thin film #solar cells. This review consolidates rec….
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For photoelectrochemical CO reduction using Cu cubes, adding an ultra-thin layer of TaOx atop the renowned TiO2 protection layer boosts ethylene selectivity (24% Faradaic efficiency), and suppresses unwanted HER! Check out our latest work led by @kath_nau!
pubs.acs.org
Tantalum oxide (TaOx) and amorphous titanium dioxide (TiO2) are employed as protection materials for commercial GaInP/GaAs/Ge triple-junction solar cells to facilitate the unbiased photoelectrochem...
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Proud to be part of another great work led by @FilRomeggio! Here, we demonstrate the synthesis of phase pure δ-Ni5Ga3 thin films and nanoparticles using magnetron sputtering WITHOUT substrate heating! The result is a highly active and selective methanol catalyst! 😎🔥.
Another paper on Ni5Ga3 is out in @ACS_Omega!📚 .We deposit thin-films mapping the structure zone dependence as in the Thornton model, and then we anneal them to form nanoparticles!⚛️.Check out the full open-access study here: #Research #Science #Thinfilms.
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RT @scanlond81: PLEASE RETWEET: Come and spend 3.5 years in our group using DFT and AI/ML to find and characterise new wide band gap oxides….
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RT @Kavanagh_Sean_: Intrinsic & extrinsic defect chemistry of trigonal Selenium, incl metastable states & non-radiative recombination. Comb….
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RT @FilRomeggio: Check out our latest research paper, titled “Magnetron Sputtering of Pure δ-Ni5Ga3 Thin Films for CO2 Hydrogenation”, is n….
pubs.acs.org
Previous studies have identified δ-Ni5Ga3 as a promising catalyst for the hydrogenation of CO2 to methanol at atmospheric pressure. Given its recent discovery, the current understanding of this...
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Andrea is a brilliant and super nice guy - if you're looking for a challenging/fun/cool Ph.D. project, this is definitely the place to go!!! 🔬.
Open #PhDposition at @DTUtweet 🚨 We are looking for a PhD student who will synthesize and characterize new thin-film materials that may beat the current state of the art for on-chip quantum communication! Link to apply below. Deadline August 25th.
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I'm super excited to announce that I've received the Internationalisation Fellowship grant from @Carlsbergfondet for my project "HIGHLIGHT"! ☀️ Therefore, I'm starting as a postdoc in @dimi_mira's group at EMPA in Switzerland only a month from today! 🇨🇭🇨🇭🇨🇭 Let's go! 🎸😎🔥
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RT @nielsen_rs: Very happy to see our latest work in which we demonstrate the first monolithic selenium/silicon tandem solar cell published….
journals.aps.org
Experiment and device simulation are combined to explore a monolithically integrated selenium/silicon tandem solar cell, offering insights toward positioning tandem solar cells as strong contenders...
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We recently developed a closed-space annealing strategy that increases grain size, enhances crystallinity and improves carrier collection in selenium thin-film #photovoltaic devices. By a LOT! 💥💥💥. Check it out here! 😎 @ACS_AMI @ACS_AEM.
pubs.acs.org
Elemental selenium is an interesting candidate for the top cell in tandem solar cells due to its wide bandgap of EG ≈ 1.95 eV as well as its monatomic simplicity. To realize high-efficiency selenium...
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Did you miss #S24MRS? 😰😰 . Not to worry, as you can now catch my conference presentation on monolithic selenium/silicon tandem solar cells on youtube!
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🌟 Excited to have been a part of the vibrant atmosphere at the 2024 MRS Spring Meeting & Exhibit in Seattle! 🌟 . A big thank you to the organizers, speakers, exhibitors, and attendees for making this event such a success! I'm already looking forward to next year! 💥. #S24MRS
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