About

Peijun Guo is a Professor of Chemical and Environmental Engineering at Yale University. His research focuses on the growth and synthesis of nanostructured materials with enhanced light-matter interactions for applications in energy conversion, optoelectronics, and information science. He employs ultrafast optical spectroscopy to temporally and spatially resolve the flow of energy in functional materials and heterostructures, as well as optical manipulation and control of excited and nonequilibrium states in emerging materials. Guo holds a Ph.D. and M.Sc. from Northwestern University and a B.Sc. from Tsinghua University. His notable awards include the ACS PRF Doctoral New Investigator Award and the AFOSR Young Investigator Program Award in 2022, among others.

Research topics

• Materials science
• Chemistry
• Physics
• Crystallography
• Inorganic chemistry
• Nanotechnology
• Condensed matter physics
• Optoelectronics
• Chemical physics
• Computer Science
• Optics
• Engineering
• Composite material
• Organic chemistry
• Nuclear magnetic resonance
• Electrical engineering

Selected publications

• Emergent layer stacking arrangements in c-axis confined MoTe2

  Nature Communications · 2023 · 46 citations

  • Materials science
  • Condensed matter physics
  • Nanotechnology

  flakes. More broadly, this work suggests c-axis confinement as a method to influence layer stacking in other 2D materials.

  DOI

• Design Principles for Enhancing Photoluminescence Quantum Yield in Hybrid Manganese Bromides

  Journal of the American Chemical Society · 2020 · 377 citations

  • Chemistry
  • Crystallography
  • Inorganic chemistry

  , where a PLQY of 70.8% for a powder sample and 98% for a large single crystal sample is achieved. Our study reveals a generalized method for improving PLQYs in hybrid manganese bromides and is readily extended to designing all varieties of highly emissive hybrid materials.

  DOI

• Pencil–paper on-skin electronics

  Proceedings of the National Academy of Sciences · 2020 · 178 citations

  • Computer Science
  • Nanotechnology
  • Computer Science

  ) can generate a sustained voltage of up to 480 mV for over 2 h from ambient humidity. Furthermore, a self-powered on-skin iontophoretic transdermal drug-delivery system is developed as an on-skin chemical intervention example. In addition, pencil-paper-based antennas, two-dimensional (2D) and three-dimensional (3D) circuits with light-emitting diodes (LEDs) and batteries, reconfigurable assembly and biodegradable electronics (based on water-soluble papers) are explored.

  DOI

• Direct Observation of Bandgap Oscillations Induced by Optical Phonons in Hybrid Lead Iodide Perovskites

  Advanced Functional Materials · 2020 · 31 citations

  1st authorCorresponding
  • Materials science
  • Chemical physics
  • Condensed matter physics

  Abstract Hybrid organic–inorganic perovskites such as methylammonium lead iodide have emerged as promising semiconductors for energy‐relevant applications. The interactions between charge carriers and lattice vibrations, giving rise to polarons, have been invoked to explain some of their extraordinary optoelectronic properties. Here, time‐resolved optical spectroscopy is performed, with off‐resonant pumping and electronic probing, to examine several representative lead iodide perovskites. The temporal oscillations of electronic bandgaps induced by coherent lattice vibrations are reported, which is attributed to antiphase octahedral rotations that dominate in the examined 3D and 2D hybrid perovskites. The off‐resonant pumping scheme permits a simplified observation of changes in the bandgap owing to the A g vibrational mode, which is qualitatively different from vibrational modes of other symmetries and without increased complexity of photogenerated electronic charges. The work demonstrates a strong correlation between the lead–iodide octahedral framework and electronic transitions, and provides further insights into the manipulation of coherent optical phonons and related properties in hybrid perovskites on ultrafast timescales.

  DOI

Recent grants

• Alternative transducer and optical pumping scheme for nanoscale thermal metrology and imaging

  NSF · $403k · 2023–2026

• Collaborative Research: Metasurface-Enabled Broadband Circular Dichroism Spectroscopy and Imaging

  NSF · $343k · 2023–2026

• Repurposing low-dimensional hybrid perovskites for the detection of low-energy photons

  NSF · $600k · 2023–2027

Frequent coauthors

• Richard D. Schaller

  93 shared

• Claudine Katan

  École Nationale Supérieure de Chimie de Rennes

  63 shared

• Jacky Even

  Fonctions Optiques pour les Technologies de l’information

  59 shared

• Mercouri G. Kanatzidis

  Northwestern University

  45 shared

• Mikaël Képénékian

  Centre National de la Recherche Scientifique

  45 shared

• Constantinos C. Stoumpos

  43 shared

• Robert P. H. Chang

  Northwestern University

  23 shared

• Shunran Li

  Yale University

  23 shared

Labs

• Peijun Guo Research GroupPI

Education

• PhD, Materials Science and Engineering

  Northwestern University

  2016

• M. Sc., Materials Science and Engineering

  Northwestern University

  2011

• BSc, Materials Science and Engineering

  Tsinghua University

  2009

Awards & honors

• ACS PRF Doctoral New Investigator (2022)
• AFOSR Young Investigator Program (YIP) Award (2022)
• Enrico Fermi Named Fellowship of Argonne National Laboratory…
• Graduate Student Gold Award, MRS Fall Meeting (2016)
• SPIE Optics and Photonics Education Scholarship (2016)

Similar researchers at Yale University

• Mark Gersteinh-217
• Liangbing Huh-172
• Akiko Iwasakih-145
• Alan Kazdinh-142
• Douglas L. Rothmanh-125