Publications

Preprints

2026

  1. Helicity-Resolved Spatiotemporal Mapping of Chiral Plexcitons in Helicoids
    Jeong Hyun Han†, Sankaran Ramesh†, Jaeyeon Jo, Pavel Chabera, Ryeong Myeong Kim, and 6 more authors
    † These authors contributed equally to this work.
    arXiv preprint arXiv:2606.09097, 2026
    arXiv

2025

  1. Phonon-Mediated Chirality Transfer from Organic Cation to Inorganic lattice in Hybrid Perovskites
    Sankaran Ramesh, Prasenjit Mandal, Rafael Araujo, Jakob Thyr, Pratik Bhagwat, and 4 more authors
    arXiv preprint arXiv:2507.10036, 2025
    arXiv

Journal Publications

2026

  1. Dimensionality-dependent electronic and vibrational dynamics in low-dimensional organic-inorganic tin halides
    Yanmei He, Xinyi Cai, Rafael B Araujo, Yibo Wang, Sankaran Ramesh, and 5 more authors
    Nature Communications, 2026
    DOI

2025

  1. Coherent Phonons, Localization, and Slow Polaron Formation in Lead-Free Gold Perovskite
    Sankaran Ramesh, Yonghong Wang, Pavel Chabera, Rafael Araujo, Mustafa Aboulsaad, and 3 more authors
    Advanced Optical Materials, 2025
    DOI

2024

  1. Unveiling the impact of organic spacer cations on auger recombination in layered halide perovskites
    Tomoki Furuhashi, Anil Kanwat, Sankaran Ramesh, Nripan Mathews, and Tze Chien Sum
    Advanced Optical Materials, 2024
    DOI PDF

2023

  1. Carriers, quasi-particles, and collective excitations in halide perovskites
    Jianhui Fu, Sankaran Ramesh, Jia Wei Melvin Lim, and Tze Chien Sum
    Chemical reviews, 2023
    DOI
  2. Spacer cation engineering in Ruddlesden-Popper perovskites for efficient red light-emitting diodes with recommendation 2020 color coordinates
    Jian Qing, Sankaran Ramesh, Xiao-Ke Liu, Heyong Wang, Hongling Yu, and 5 more authors
    Applied Surface Science, 2023
    DOI
  3. Enhancing two-dimensional electronic spectroscopy for layered halide perovskites
    Sankaran Ramesh, Minjun Feng, Tomoki Furuhashi, and Tze Chien Sum
    ACS Photonics, 2023
    DOI PDF

2022

  1. Defect passivation using a phosphonic acid surface modifier for efficient RP perovskite blue-light-emitting diodes
    Jayanta Kumar Mishra, Natalia Yantara, Anil Kanwat, Tomoki Furuhashi, Sankaran Ramesh, and 6 more authors
    ACS applied materials & interfaces, 2022
    DOI
  2. Tailoring the energy manifold of quasi-two-dimensional perovskites for efficient carrier extraction
    Sankaran Ramesh, David Giovanni, Marcello Righetto, Senyun Ye, Elisa Fresch, and 4 more authors
    Advanced Energy Materials, 2022
    DOI PDF

2021

  1. Origins of the long-range exciton diffusion in perovskite nanocrystal films: photon recycling vs exciton hopping
    David Giovanni, Marcello Righetto, Qiannan Zhang, Jia Wei Melvin Lim, Sankaran Ramesh, and 1 more author
    Light: Science & Applications, 2021
    DOI
  2. Electronic states modulation by coherent optical phonons in 2D halide perovskites
    Jianhui Fu, Mingjie Li, Ankur Solanki, Qiang Xu, Yulia Lekina, and 3 more authors
    Advanced Materials, 2021
    DOI PDF
  3. Spacer cation alloying in ruddlesden–popper perovskites for efficient red light-emitting diodes with precisely tunable wavelengths
    Jian Qing, Sankaran Ramesh, Qiang Xu, Xiao-Ke Liu, Heyong Wang, and 5 more authors
    Advanced Materials, 2021
    DOI

2020

  1. Excitons in 2D perovskites for ultrafast terahertz photonic devices
    Abhishek Kumar, Ankur Solanki, Manukumara Manjappa, Sankaran Ramesh, Yogesh Kumar Srivastava, and 3 more authors
    Science Advances, 2020
    DOI
  2. Hot carriers perspective on the nature of traps in perovskites
    Marcello Righetto, Swee Sien Lim, David Giovanni, Jia Wei Melvin Lim, Qiannan Zhang, and 3 more authors
    Nature Communications, 2020
    DOI
  3. Inducing formation of a corrugated, white-light emitting 2D lead-bromide perovskite via subtle changes in templating cation
    Benny Febriansyah, David Giovanni, Sankaran Ramesh, Teck Ming Koh, Yongxin Li, and 3 more authors
    Journal of Materials Chemistry C, 2020
    DOI PDF
  4. The physics of interlayer exciton delocalization in Ruddlesden–Popper lead halide perovskites
    David Giovanni†, Sankaran Ramesh†, Marcello Righetto, Jia Wei Melvin Lim, Qiannan Zhang, and 5 more authors
    † These authors contributed equally to this work.
    Nano Letters, 2020
    DOI

2017

  1. Thermodynamic stability of LuRhO3 in a photoelectrochemical cell
    KT Jacob and Sankaran Ramesh
    Journal of Alloys and Compounds, 2017
    DOI