SUM Tze Chien

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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21 to 30 of 57 Results

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: Origins of the Long-Range Exciton Diffusion in Perovskite Nanocrystal Films: Photon Recycling vs Exciton Hopping Feb 25, 2021 - David Giovanni Giovanni, David; Righetto, Marcello; Zhang, Qiannan; Lim, Jia Wei Melvin; Ramesh, Sankaran; Sum, Tze Chien, 2021, "Replication Data for: Origins of the Long-Range Exciton Diffusion in Perovskite Nanocrystal Films: Photon Recycling vs Exciton Hopping", https://doi.org/10.21979/N9/6QTW2E, DR-NTU (Data), V1 The outstanding optoelectronic performance of lead halide perovskites lies in their exceptional carrier diffusion properties. As the perovskite material dimensionality is reduced to exploit the quantum confinement effects, the disruption to the perovskite lattice, often with insu...
Replication Data for: The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites Feb 25, 2021 - Zhang Qiannan Walukiewicz, Wladek; Wang, Shu; Wu, Xinchun; Li, Rundong; Sherburne, Matthew P.; Wu, Bo; Sum, Tze Chien; Ager, Joel W.; Asta, Mark D., 2021, "Replication Data for: The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites", https://doi.org/10.21979/N9/9LBMRG, DR-NTU (Data), V1 The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the remarkable performance of perovskites as photovoltaic materials. It is shown that the amphoteric defect...
Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite Feb 18, 2021 - FU Jianhui Fu, Jianhui, 2021, "Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite", https://doi.org/10.21979/N9/LTPBM2, DR-NTU (Data), V1 Replication data for the paper including the raw data, processed data and figures. DOI: Sci. Adv. 2021; 7 : eabd3160
Replication Data for: Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites Feb 16, 2021 - FU Jianhui Fu, Jianhui; Li, Mingjie; Solanki, Ankur; Xu, Qiang; Lekina, Yulia; Ramesh, Sankaran; Shen, Ze Xiang; Sum, Tze Chien, 2021, "Replication Data for: Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites", https://doi.org/10.21979/N9/D8BMV2, DR-NTU (Data), V1 Replication data for this paper published in Adv. Mater. including raw data, processed data and figures. DOI:10.1002/adma.202006233
Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites Dec 19, 2020 - RAMESH Sankaran Ramesh, Sankaran, 2020, "Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites", https://doi.org/10.21979/N9/OIYOW1, DR-NTU (Data), V2 Abstract: Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel inter-well energy funnelling phenomenon, whi...
Replication Data for: Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites Oct 4, 2020 Fu, Jianhui, 2020, "Replication Data for: Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites", https://doi.org/10.21979/N9/WJFNG2, DR-NTU (Data), V1 Halide perovskites possess enormous potential for various optoelectronic applications. Presently, a clear understanding of the interplay between the lattice and electronic effects is still elusive. Specifically, the weakly absorbing tail states and dual emission from perovskites...
Replication Data for: Hot Carriers Perspective on the Nature of Traps in Perovskites Oct 4, 2020 - Marcello Righetto Righetto, Marcello; Giovanni, David; Lim,Swee Sien; Lim, Melvin Jia Wei; Zhang, Qiannan; Ramesh, Sankaran; Tay, Eugene Yong Kang; Sum, Tze Chien, 2020, "Replication Data for: Hot Carriers Perspective on the Nature of Traps in Perovskites", https://doi.org/10.21979/N9/EGH6UI, DR-NTU (Data), V1, UNF:6:Ud8rdQUE51iNRiEebr7UUg== [fileUNF] The defects in lead halide perovskites are usually regarded benign to their optoelectronic properties but it remains a question to what extent. Here Righetto et al. quantify how hot carriers experience increased trapping rates at the defects, making them less benign and develop a...
Replication Data for: Halide Perovskite Nanocrystals for Multiphoton Applications Sep 9, 2020 - HE Huajun He, Huajun; Sum, Tze Chien, 2020, "Replication Data for: Halide Perovskite Nanocrystals for Multiphoton Applications", https://doi.org/10.21979/N9/OOTXQG, DR-NTU (Data), V1 Halide perovskite nanocrystals (NCs) are a unique class of NCs with novel properties distinct from traditional semiconductor NCs. These exceptional properties of defect tolerance, large absorption coefficients, high brightness, and narrow emission linewidths stem from their atypi...
Replication Data for: Resolving Spectral Mismatch Errors for Perovskite Solar Cells in Commercial Class AAA Solar Simulators May 27, 2020 - YE Senyun Ye, Senyun; Chen, Bingbing; Cheng, Yuanhang; Feng, Minjun; Rao, Haixia; Lam, Yeng Ming; Sum, Tze Chien, 2020, "Replication Data for: Resolving Spectral Mismatch Errors for Perovskite Solar Cells in Commercial Class AAA Solar Simulators", https://doi.org/10.21979/N9/WLK78G, DR-NTU (Data), V1 In this Viewpoint article, the spectral mismatch errors of three commercial Class AAA solar simulators used for typical perovskite solar cell (PSC) characterization are evaluated. Our findings indicate that the spectral mismatch of the specific solar simulators can result in meas...

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: Origins of the Long-Range Exciton Diffusion in Perovskite Nanocrystal Films: Photon Recycling vs Exciton Hopping

Feb 25, 2021 - David Giovanni

Giovanni, David; Righetto, Marcello; Zhang, Qiannan; Lim, Jia Wei Melvin; Ramesh, Sankaran; Sum, Tze Chien, 2021, "Replication Data for: Origins of the Long-Range Exciton Diffusion in Perovskite Nanocrystal Films: Photon Recycling vs Exciton Hopping", https://doi.org/10.21979/N9/6QTW2E, DR-NTU (Data), V1

The outstanding optoelectronic performance of lead halide perovskites lies in their exceptional carrier diffusion properties. As the perovskite material dimensionality is reduced to exploit the quantum confinement effects, the disruption to the perovskite lattice, often with insu...

Replication Data for: The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites

Feb 25, 2021 - Zhang Qiannan

Walukiewicz, Wladek; Wang, Shu; Wu, Xinchun; Li, Rundong; Sherburne, Matthew P.; Wu, Bo; Sum, Tze Chien; Ager, Joel W.; Asta, Mark D., 2021, "Replication Data for: The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites", https://doi.org/10.21979/N9/9LBMRG, DR-NTU (Data), V1

The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the remarkable performance of perovskites as photovoltaic materials. It is shown that the amphoteric defect...

Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite

Feb 18, 2021 - FU Jianhui

Fu, Jianhui, 2021, "Replication Data for: Strong Self-trapping by Deformation Potential Limits Photovoltaic Performance in Bismuth Double Perovskite", https://doi.org/10.21979/N9/LTPBM2, DR-NTU (Data), V1

Replication data for the paper including the raw data, processed data and figures. DOI: Sci. Adv. 2021; 7 : eabd3160

Replication Data for: Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites

Feb 16, 2021 - FU Jianhui

Fu, Jianhui; Li, Mingjie; Solanki, Ankur; Xu, Qiang; Lekina, Yulia; Ramesh, Sankaran; Shen, Ze Xiang; Sum, Tze Chien, 2021, "Replication Data for: Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites", https://doi.org/10.21979/N9/D8BMV2, DR-NTU (Data), V1

Replication data for this paper published in Adv. Mater. including raw data, processed data and figures. DOI:10.1002/adma.202006233

Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites

Dec 19, 2020 - RAMESH Sankaran

Ramesh, Sankaran, 2020, "Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites", https://doi.org/10.21979/N9/OIYOW1, DR-NTU (Data), V2

Abstract: Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel inter-well energy funnelling phenomenon, whi...

Replication Data for: Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites

Oct 4, 2020

Fu, Jianhui, 2020, "Replication Data for: Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites", https://doi.org/10.21979/N9/WJFNG2, DR-NTU (Data), V1

Halide perovskites possess enormous potential for various optoelectronic applications. Presently, a clear understanding of the interplay between the lattice and electronic effects is still elusive. Specifically, the weakly absorbing tail states and dual emission from perovskites...

Replication Data for: Hot Carriers Perspective on the Nature of Traps in Perovskites

Oct 4, 2020 - Marcello Righetto

Righetto, Marcello; Giovanni, David; Lim,Swee Sien; Lim, Melvin Jia Wei; Zhang, Qiannan; Ramesh, Sankaran; Tay, Eugene Yong Kang; Sum, Tze Chien, 2020, "Replication Data for: Hot Carriers Perspective on the Nature of Traps in Perovskites", https://doi.org/10.21979/N9/EGH6UI, DR-NTU (Data), V1, UNF:6:Ud8rdQUE51iNRiEebr7UUg== [fileUNF]

The defects in lead halide perovskites are usually regarded benign to their optoelectronic properties but it remains a question to what extent. Here Righetto et al. quantify how hot carriers experience increased trapping rates at the defects, making them less benign and develop a...

Replication Data for: Halide Perovskite Nanocrystals for Multiphoton Applications

Sep 9, 2020 - HE Huajun

He, Huajun; Sum, Tze Chien, 2020, "Replication Data for: Halide Perovskite Nanocrystals for Multiphoton Applications", https://doi.org/10.21979/N9/OOTXQG, DR-NTU (Data), V1

Halide perovskite nanocrystals (NCs) are a unique class of NCs with novel properties distinct from traditional semiconductor NCs. These exceptional properties of defect tolerance, large absorption coefficients, high brightness, and narrow emission linewidths stem from their atypi...

Replication Data for: Resolving Spectral Mismatch Errors for Perovskite Solar Cells in Commercial Class AAA Solar Simulators

May 27, 2020 - YE Senyun

Ye, Senyun; Chen, Bingbing; Cheng, Yuanhang; Feng, Minjun; Rao, Haixia; Lam, Yeng Ming; Sum, Tze Chien, 2020, "Replication Data for: Resolving Spectral Mismatch Errors for Perovskite Solar Cells in Commercial Class AAA Solar Simulators", https://doi.org/10.21979/N9/WLK78G, DR-NTU (Data), V1

In this Viewpoint article, the spectral mismatch errors of three commercial Class AAA solar simulators used for typical perovskite solar cell (PSC) characterization are evaluated. Our findings indicate that the spectral mismatch of the specific solar simulators can result in meas...

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