• Publications
  • Influence
High-efficiency solution-processed perovskite solar cells with millimeter-scale grains
Large-crystal perovskite films The performance of organic-inorganic hybrid perovskite planar solar cells has steadily improved. One outstanding issue is that grain boundaries and defects inExpand
  • 2,124
  • 18
  • PDF
High-efficiency two-dimensional Ruddlesden–Popper perovskite solar cells
Three-dimensional organic–inorganic perovskites have emerged as one of the most promising thin-film solar cell materials owing to their remarkable photophysical properties, which have led to powerExpand
  • 1,237
  • 10
  • PDF
Type-II core/shell CdS/ZnSe nanocrystals: synthesis, electronic structures, and spectroscopic properties.
We report a two-step synthesis of highly luminescent CdS/ZnSe core/shell nanocrystals (emission quantum yields up to 50%) that can produce efficient spatial separation of electrons and holes betweenExpand
  • 320
  • 6
  • PDF
Third and fourth optical transitions in semiconducting carbon nanotubes.
We have studied the optical transition energies of single-wall carbon nanotubes over broad diameter (0.7-2.3 nm) and energy (1.26-2.71 eV) ranges, using their radial breathing mode Raman spectra. WeExpand
  • 233
  • 6
  • PDF
Spectrally resolved dynamics of energy transfer in quantum-dot assemblies: towards engineered energy flows in artificial materials.
We report on the dynamics of resonant energy transfer in monodisperse, mixed-size, and energy-gradient (layered) assemblies of CdSe nanocrystal quantum dots. Time-resolved and spectrally resolvedExpand
  • 518
  • 4
  • PDF
Bacteriochlorophyll and Carotenoid Excitonic Couplings in the LH2 System of Purple Bacteria
An effective Frenkel-exciton Hamiltonian for the entire LH2 photosynthetic complex (B800, B850, and carotenoids) from Rhodospirillum molischianum is calculated by combining the crystal structure withExpand
  • 91
  • 4
  • PDF
Density matrix analysis and simulation of electronic excitations in conjugated and aggregated molecules.
Predicting the electronic structure of extended organic molecules constitutes an important fundamental task of modern chemistry. Studies of electronic excitations, charge-transfer, energy-transfer,Expand
  • 372
  • 3
  • PDF
Light-induced lattice expansion leads to high-efficiency perovskite solar cells
Light relaxes hybrid perovskites Ion migration in organic-inorganic perovskite solar cells limits device stability and performance. Tsai et al. found that a cesium-doped lead triiodide perovskiteExpand
  • 219
  • 3
  • PDF
Exciton scattering and localization in branched dendrimeric structures
Abstractπ-conjugated dendrimers are molecular examples of tree-like structures known in physics as Bethe lattices. Electronic excitations in these systems can be spatially delocalized or localizedExpand
  • 77
  • 3
  • PDF
Scanning tunneling microscopy of DNA-wrapped carbon nanotubes.
We employ scanning tunneling microscopy (STM) to reveal the structure of DNA-carbon nanotube complexes with unprecedented spatial resolution and compare our experimental results to molecular dynamicsExpand
  • 109
  • 3
  • PDF