Sum Tze Chien

Appointment: Director, Institute of Advanced Studies
Professor, School of Physical & Mathematical Sciences - Division of Physics & Applied Physics
Associate Dean (Research), College of Science

Research topics:

Ultrafast optical spectroscopy and time-integrated optical spectroscopy of emergent nanoscale and light harvesting material systems:

• Investigating light matter interactions
• Energy and charge transfer mechanisms
• Probing carrier and quasi-particle dynamics

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1 to 10 of 46 Results

Replication data for: Topological Feature Engineering for Machine Learning Based Halide Perovskite Materials Design Dec 1, 2022 - Xu Qiang Anand, D Vijay; Xu, Qiang; Wee, Junjie; Xia, Kelin; Sum, Tze Chien, 2022, "Replication data for: Topological Feature Engineering for Machine Learning Based Halide Perovskite Materials Design", https://doi.org/10.21979/N9/CVJWZ9, DR-NTU (Data), V1 Accelerated materials development with machine learning (ML) assisted screening and high throughput experimentation for new photovoltaic materials holds the key to addressing our grand energy challenges. Data-driven ML is envisaged as a decisive enabler for new perovskite materia...
Replication Data for: Strain propagation in layered two-dimensional halide perovskites Sep 19, 2022 - Fu Jianhui Fu, Jianhui, 2022, "Replication Data for: Strain propagation in layered two-dimensional halide perovskites", https://doi.org/10.21979/N9/5BKLHK, DR-NTU (Data), V1 Replication Data for: Strain propagation in layered two-dimensional halide perovskites published in Science Advances
Replication Data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy Sep 17, 2022 - Feng Minjun Feng, Minjun; Ye, Senyun; Guo, Yuanyuan; Sum, Tze Chien, 2022, "Replication Data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy", https://doi.org/10.21979/N9/8JDYHO, DR-NTU (Data), V1 Raw data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy
Replication Data for: Electric Field Modulation of 2D Perovskite Excitonics Aug 2, 2022 - Zhang Qiannan Zhang, Qiannan; Krisnanda, Tanjung; Giovanni, David; Dini, Kevin; Ye, Senyun; Feng, Minjun; Liew, Timothy C. H.; Sum, Tze Chien, 2022, "Replication Data for: Electric Field Modulation of 2D Perovskite Excitonics", https://doi.org/10.21979/N9/DSOXRO, DR-NTU (Data), V1 Raw data for Electric Field Modulation of 2D Perovskite Excitonics
Replication Data for: Water-stable Perovskite Quantum Dots-Based FRET Nanosensor for the Detection of Rhodamine 6G in Water, Food, and Biological Samples Jun 6, 2022 - Chan Kok Ken Chan, Kok Ken, 2022, "Replication Data for: Water-stable Perovskite Quantum Dots-Based FRET Nanosensor for the Detection of Rhodamine 6G in Water, Food, and Biological Samples", https://doi.org/10.21979/N9/8ZURD3, DR-NTU (Data), V1, UNF:6:DBhvRwxxlwI1iwvRkAnN1A== [fileUNF] The practical application of perovskite quantum dots (QDs) for sensing in the aqueous phase has been restricted by their poor resistance to moisture and oxygen due to their highly ionic characteristic. In this work, we employed silica and phospholipid co-encapsulated water-stable...
Replication Data for: Tailoring the Energy Manifold of Quasi-2D Perovskites for Efficient Carrier Extraction Jan 28, 2022 - Ramesh Sankaran Ramesh, Sankaran, 2022, "Replication Data for: Tailoring the Energy Manifold of Quasi-2D Perovskites for Efficient Carrier Extraction", https://doi.org/10.21979/N9/YXVNNF, DR-NTU (Data), V1 Harvesting the excess energy from absorbed above bandgap photons is a promising approach to overcome the detailed balance limit for higher solar cell efficiencies. However, this remains very challenging for 2D layered halide perovskites as the fast excess energy loss competes eff...
Replication Data for: Spotlight on Hot Carriers in Halide Perovskite Luminescence Jan 24, 2022 - Lim Jia Wei Melvin Lim, Jia Wei Melvin, 2022, "Replication Data for: Spotlight on Hot Carriers in Halide Perovskite Luminescence", https://doi.org/10.21979/N9/PMBK22, DR-NTU (Data), V1 Harnessing hot carriers’ (HC) excess energy is an attractive approach to surpass the Shockley-Queisser limit. Halide perovskites possess desirable slow HC cooling properties for developing next-generation solar cells. Their HC cooling properties on the ultrafast timescale are wel...
Replication Data for: Spacer Cation Alloying in Ruddlesden–Popper Perovskites for Efficient Red Light-Emitting Diodes with Precisely Tunable Wavelengths Oct 13, 2021 - Ramesh Sankaran Ramesh, Sankaran, 2021, "Replication Data for: Spacer Cation Alloying in Ruddlesden–Popper Perovskites for Efficient Red Light-Emitting Diodes with Precisely Tunable Wavelengths", https://doi.org/10.21979/N9/ORJLUR, DR-NTU (Data), V1 Perovskite light-emitting diodes (PeLEDs) have recently shown significant progress with external quantum efficiencies (EQEs) exceeding 20%. However, PeLEDs with pure-red (620−660 nm) light emission, an essential part for full-color displays, remain a great challenge. Herein, a ge...
Replication Data for: Effect of Alloying on the Dynamics of Coherent Acoustic Phonons in Bismuth Double Perovskite Single Crystals Mar 18, 2021 - Zhang Qiannan Lin, Xihong; Wu, Bo; Ning, Weihua; Feng, Minjun; Xu, Qiang; Gao, Feng; Sum, Tze Chien; Zhou, Guofu, 2021, "Replication Data for: Effect of Alloying on the Dynamics of Coherent Acoustic Phonons in Bismuth Double Perovskite Single Crystals", https://doi.org/10.21979/N9/VATLX2, DR-NTU (Data), V1 The bismuth double perovskite Cs2AgBiBr6 has been regarded as a potential candidate for lead-free perovskite photovoltaics. A detailed study on the coherent acoustic phonon dynamics in the pure, Sb- and Tl-alloyed Cs2AgBiBr6 single crystals is performed to understand the effects...
Replication Data for: Room Temperature Light-Mediated Long-Range Coupling of Excitons in Perovskites Mar 18, 2021 - Zhang Qiannan Krisnanda, Tanjung; Zhang, Qiannan; Dini, Kevin; Giovanni, David; Liew, Timothy C. H.; Sum, Tze Chien, 2021, "Replication Data for: Room Temperature Light-Mediated Long-Range Coupling of Excitons in Perovskites", https://doi.org/10.21979/N9/HEOAE7, DR-NTU (Data), V1 Perovskites have been the focus of attention due to their multitude of outstanding optoelectronic properties and structural versatility. Two-dimensional halide perovskite such as (C6H5C2H4NH3)2PbI4, or simply PEPI, forms natural multiple quantum wells with enhanced lightmatter in...

Replication data for: Topological Feature Engineering for Machine Learning Based Halide Perovskite Materials Design

Dec 1, 2022 - Xu Qiang

Anand, D Vijay; Xu, Qiang; Wee, Junjie; Xia, Kelin; Sum, Tze Chien, 2022, "Replication data for: Topological Feature Engineering for Machine Learning Based Halide Perovskite Materials Design", https://doi.org/10.21979/N9/CVJWZ9, DR-NTU (Data), V1

Accelerated materials development with machine learning (ML) assisted screening and high throughput experimentation for new photovoltaic materials holds the key to addressing our grand energy challenges. Data-driven ML is envisaged as a decisive enabler for new perovskite materia...

Replication Data for: Strain propagation in layered two-dimensional halide perovskites

Sep 19, 2022 - Fu Jianhui

Fu, Jianhui, 2022, "Replication Data for: Strain propagation in layered two-dimensional halide perovskites", https://doi.org/10.21979/N9/5BKLHK, DR-NTU (Data), V1

Replication Data for: Strain propagation in layered two-dimensional halide perovskites published in Science Advances

Replication Data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy

Sep 17, 2022 - Feng Minjun

Feng, Minjun; Ye, Senyun; Guo, Yuanyuan; Sum, Tze Chien, 2022, "Replication Data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy", https://doi.org/10.21979/N9/8JDYHO, DR-NTU (Data), V1

Raw data for: Intrinsic Carrier Diffusion in Perovskite Thin Films undressed by Transient Reflectance Spectroscopy

Replication Data for: Electric Field Modulation of 2D Perovskite Excitonics

Aug 2, 2022 - Zhang Qiannan

Zhang, Qiannan; Krisnanda, Tanjung; Giovanni, David; Dini, Kevin; Ye, Senyun; Feng, Minjun; Liew, Timothy C. H.; Sum, Tze Chien, 2022, "Replication Data for: Electric Field Modulation of 2D Perovskite Excitonics", https://doi.org/10.21979/N9/DSOXRO, DR-NTU (Data), V1

Raw data for Electric Field Modulation of 2D Perovskite Excitonics

Replication Data for: Water-stable Perovskite Quantum Dots-Based FRET Nanosensor for the Detection of Rhodamine 6G in Water, Food, and Biological Samples

Jun 6, 2022 - Chan Kok Ken

Chan, Kok Ken, 2022, "Replication Data for: Water-stable Perovskite Quantum Dots-Based FRET Nanosensor for the Detection of Rhodamine 6G in Water, Food, and Biological Samples", https://doi.org/10.21979/N9/8ZURD3, DR-NTU (Data), V1, UNF:6:DBhvRwxxlwI1iwvRkAnN1A== [fileUNF]

The practical application of perovskite quantum dots (QDs) for sensing in the aqueous phase has been restricted by their poor resistance to moisture and oxygen due to their highly ionic characteristic. In this work, we employed silica and phospholipid co-encapsulated water-stable...

Replication Data for: Tailoring the Energy Manifold of Quasi-2D Perovskites for Efficient Carrier Extraction

Jan 28, 2022 - Ramesh Sankaran

Ramesh, Sankaran, 2022, "Replication Data for: Tailoring the Energy Manifold of Quasi-2D Perovskites for Efficient Carrier Extraction", https://doi.org/10.21979/N9/YXVNNF, DR-NTU (Data), V1

Harvesting the excess energy from absorbed above bandgap photons is a promising approach to overcome the detailed balance limit for higher solar cell efficiencies. However, this remains very challenging for 2D layered halide perovskites as the fast excess energy loss competes eff...

Replication Data for: Spotlight on Hot Carriers in Halide Perovskite Luminescence

Jan 24, 2022 - Lim Jia Wei Melvin

Lim, Jia Wei Melvin, 2022, "Replication Data for: Spotlight on Hot Carriers in Halide Perovskite Luminescence", https://doi.org/10.21979/N9/PMBK22, DR-NTU (Data), V1

Harnessing hot carriers’ (HC) excess energy is an attractive approach to surpass the Shockley-Queisser limit. Halide perovskites possess desirable slow HC cooling properties for developing next-generation solar cells. Their HC cooling properties on the ultrafast timescale are wel...

Replication Data for: Spacer Cation Alloying in Ruddlesden–Popper Perovskites for Efficient Red Light-Emitting Diodes with Precisely Tunable Wavelengths

Oct 13, 2021 - Ramesh Sankaran

Ramesh, Sankaran, 2021, "Replication Data for: Spacer Cation Alloying in Ruddlesden–Popper Perovskites for Efficient Red Light-Emitting Diodes with Precisely Tunable Wavelengths", https://doi.org/10.21979/N9/ORJLUR, DR-NTU (Data), V1

Perovskite light-emitting diodes (PeLEDs) have recently shown significant progress with external quantum efficiencies (EQEs) exceeding 20%. However, PeLEDs with pure-red (620−660 nm) light emission, an essential part for full-color displays, remain a great challenge. Herein, a ge...

Replication Data for: Effect of Alloying on the Dynamics of Coherent Acoustic Phonons in Bismuth Double Perovskite Single Crystals

Mar 18, 2021 - Zhang Qiannan

Lin, Xihong; Wu, Bo; Ning, Weihua; Feng, Minjun; Xu, Qiang; Gao, Feng; Sum, Tze Chien; Zhou, Guofu, 2021, "Replication Data for: Effect of Alloying on the Dynamics of Coherent Acoustic Phonons in Bismuth Double Perovskite Single Crystals", https://doi.org/10.21979/N9/VATLX2, DR-NTU (Data), V1

The bismuth double perovskite Cs2AgBiBr6 has been regarded as a potential candidate for lead-free perovskite photovoltaics. A detailed study on the coherent acoustic phonon dynamics in the pure, Sb- and Tl-alloyed Cs2AgBiBr6 single crystals is performed to understand the effects...

Replication Data for: Room Temperature Light-Mediated Long-Range Coupling of Excitons in Perovskites

Mar 18, 2021 - Zhang Qiannan

Krisnanda, Tanjung; Zhang, Qiannan; Dini, Kevin; Giovanni, David; Liew, Timothy C. H.; Sum, Tze Chien, 2021, "Replication Data for: Room Temperature Light-Mediated Long-Range Coupling of Excitons in Perovskites", https://doi.org/10.21979/N9/HEOAE7, DR-NTU (Data), V1

Perovskites have been the focus of attention due to their multitude of outstanding optoelectronic properties and structural versatility. Two-dimensional halide perovskite such as (C6H5C2H4NH3)2PbI4, or simply PEPI, forms natural multiple quantum wells with enhanced lightmatter in...

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