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Sum Lab

@SumLab_NTU

Femtosecond Dynamics Lab led by @TzeChienSUM | @NTUSg | Ultrafast Spectroscopy #Perovskites

 Singapore
personal.ntu.edu.sg/tzechien/spms/
Joined July 2022
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Today, we welcome our alumnus Dr. Sankaran Ramesh (NTU PhD 2023) back to the lab. He begins his independent career as Assistant Professor at IIT Kharagpur, leading research in ultrafast spectroscopy and light–matter interactions. Proud to see his journey continue! #Alumni #NTUsg – at West Region, Singapore
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
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Sum Lab retweeted
Sum Lab (@SumLab_NTU) profile picture
Sum Lab@SumLab_NTUMar 28
Room-temperature polaritonics is here 🔥 Our work shows ultrafast coherent exciton–polaritons in layered perovskites with giant LT splitting—unlocking slow light & next-gen photonics. Proud to share this in Nature Photonics! rdcu.be/faauS
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Room-temperature polaritonics is here 🔥 Our work shows ultrafast coherent exciton–polaritons in layered perovskites with giant LT splitting—unlocking slow light & next-gen photonics. Proud to share this in Nature Photonics! rdcu.be/faauS
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Thrilled to share that our Chemical Science article, “Direct determination of multiphoton absorption cross-sections by transient absorption spectroscopy,” has been selected for the 2025 Chemical Science Most Popular Physical Chemistry Collection 🎉 🔗 pubs.rsc.org/doi/D5SC03392F
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🎓 Huge congratulations to Dr. Rui Cai and Dr. Tomoki Furuhashi on receiving their PhD degrees today! Your hard work, dedication, and perseverance have truly paid off. Wishing you both continued success in your journeys ahead! 👏🎉 #PhDGraduation #NewDoctors
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
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🎓 Huge congratulations to Dr. Rui Cai and Dr. Tomoki Furuhashi on receiving their PhD degrees today! Your hard work, dedication, and perseverance have truly paid off. Wishing you both continued success in your journeys ahead! 👏🎉 #PhDGraduation #NewDoctors
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
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💧Bright perovskite quantum dots that love water? Yes, really! Our latest @AdvMater paper reports ultra-stable, mono-disperse aqueous perovskite quantum emitters with >80% PLQY & single-photon emission at ≈0.1 nM. 🔗 doi.org/10.1002/adma.2025003… @SumLab_NTU #QuantumDots #Perovskites – at West Region, Singapore
Aqueous Colloidal Perovskite Quantum Emitters

Aqueous Colloidal Perovskite Quantum Emitters

Facile structural transformation-induced in situ core-shell self-assembly for constructing mono-dispersed aqueous colloidal perovskite nanocrystals, exhibiting unprecedented aqueous solution single...

advanced.onlinelibrary.wiley.com
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Congratulations, Dr. Tomoki Furuhashi, on successfully defending your thesis! Your perseverance and dedication have truly paid off. Wishing you an exciting and successful journey ahead in all your future endeavors! 👏🏻👏🏻🎉🎉🍾🍾🙌🙌
Image from Sum Lab (@SumLab_NTU)
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Congratulations to Dr. Cai Rui on successfully defending your thesis today! Your hard work and dedication have paid off - here’s to a bright future ahead!👏🏻👏🏻🎉🎉🍾🍾🙌🙌
Image from Sum Lab (@SumLab_NTU)
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🎉 Our heartiest congratulations to Dr. Wang Yue on earning her PhD! 🥳 Your dedication and hard work have truly paid off. Here’s to new adventures and groundbreaking discoveries ahead! 👩‍🎓✨#NTUsg
Image from Sum Lab (@SumLab_NTU)
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The organic and inorganic sublattices in 2D halide perovskites are not electronically isolated but show both electronic and mechanical couplings. Check out our latest work @NatureComms by @JamesFu09318317 @SumLab_NTU nature.com/articles/s41467-0…

Organic and inorganic sublattice coupling in two-dimensional lead halide perovskites

Nature Communications - By resonant pumping the organic cation in 2D perovskite, Fu et al. report the electronic and mechanical couplings between the organic and inorganic sublattices, evidenced by...

nature.com
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One more Chapter for my PhD thesis🤗. We used chirped pulses to precisely modulate the exciton spectrum, via the biexciton mediated optical Stark effect in 2D halide perovikites. @SumLab_NTU @NanoLetters Check it 👇 pubs.acs.org/doi/10.1021/acs…
Floquet Engineering of Excitons in Two-Dimensional Halide Perovskites via Biexciton States

Floquet Engineering of Excitons in Two-Dimensional Halide Perovskites via Biexciton States

Abstract. Layered two-dimensional halide perovskites (2DHPs) exhibit exciting non-equilibrium properties that allow the manipulation of energy levels throu

pubs.acs.org
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Sum Lab retweeted
ACS Nano (@acsnano) profile picture
ACS Nano@acsnano18 Apr 2024
Researchers led by @TzeChienSUM @NTUsg synthesized weakly confined HOIP #QuantumDots at room temperature which exhibit superior #singlephoton purity with nearly blinking-free behavior. #perovskites #excitons Read the full text here 👉 go.acs.org/8Yn
TOC image from the article

ALT TOC image from the article

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🔬Delving into Cooling Bottlenecks in Perovskite Nanocrystals! Our work reveals how quantum confinement influences carrier cooling rates—size, composition, and interactions play key roles. Key insights for hot carrier extraction and beyond. @SumLab_NTU pubs.acs.org/doi/10.1021/jac…
Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals

Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals

Abstract. Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficien

pubs.acs.org
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Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals | Journal of the American Chemical Society @NTUsg @TzeChienSUM #Exciton #Cooling #Bottlenecks #Halide #Perovskites #Nanocrystals pubs.acs.org/doi/10.1021/jac…
Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals

Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals

Abstract. Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficien

pubs.acs.org
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Discover the vital role of organic spacers in layered halide perovskites and their impact on Auger recombination. Dive into our latest article in Advanced Optical Materials. onlinelibrary.wiley.com/doi/… #Perovskites #Research
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Would carrier multiplication manifest in an actual perovskite solar cell device? Check out our latest work @NatureComms by @Yue009_NTU @SumLab_NTU nature.com/articles/s41467-0…
Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Nature Communications - While there has been evidence of strong carrier multiplication effects in halide perovskites, studies in actual solar cells are lacking. Here, the authors demonstrate such...

nature.com
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Wang et al. @Yue009_NTU @SumLab_NTU demonstrate strong #carrier multiplication effect in halide #perovskites with low threshold of 2Eg and high #efficiency of 99.4%, realizing unbiased internal quantum efficiency up to 160% #Devices #GettingApplied nature.com/articles/s41467-0…
Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Nature Communications - While there has been evidence of strong carrier multiplication effects in halide perovskites, studies in actual solar cells are lacking. Here, the authors demonstrate such...

nature.com
Yue Wang (@Yue009_NTU) profile pictureYue Wang@Yue009_NTU10 Oct 2023
Would carrier multiplication manifest in an actual perovskite solar cell device? Check out our latest work @NatureComms by @Yue009_NTU @SumLab_NTU nature.com/articles/s41467-0…
Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Carrier multiplication in perovskite solar cells with internal quantum efficiency exceeding 100%

Nature Communications - While there has been evidence of strong carrier multiplication effects in halide perovskites, studies in actual solar cells are lacking. Here, the authors demonstrate such...

nature.com
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Heartiest Congratulations Dr Melvin Lim - @JWMelvinLim – at West Region, Singapore
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
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NTU Femtolab gathering at #ICMAT2023! A warm homecoming back to SG to all our alumni - Professor Chen Shi, Professor Li Mingjie and Professor Ankur Solanki! – at Central Region, Singapore
Image from Sum Lab (@SumLab_NTU)
Image from Sum Lab (@SumLab_NTU)
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