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Photocarrier recombination dynamics in perovskite CH3NH3PbI3 for solar cell applications.
Using time-resolved photoluminescence and transient absorption measurements at room temperature, this work reports excitation-intensity-dependent photocarrier recombination processes in thin films made from the organo-metal halide perovskite semiconductor CH3NH3PbI3 for solar-cell applications, providing clear evidence that the free-carrier model is better than the exciton model for interpreting the optical properties of chiral semiconductors.
Purely organic electroluminescent material realizing 100% conversion from electricity to light
A thermally activated delayed fluorescence material for organic light-emitting diodes is shown, which realizes both approximately 100% photoluminescence quantum yield and Approximately 100% up-conversion of the triplet to singlet excited state.
Near-band-edge optical responses of solution-processed organic–inorganic hybrid perovskite CH3NH3PbI3 on mesoporous TiO2 electrodes
We studied the near-band-edge optical responses of solution-processed CH3NH3PbI3 on mesoporous TiO2 electrodes, which is utilized in mesoscopic heterojunction solar cells. Photoluminescence (PL) and
Toward pi-conjugated molecule bundles: synthesis of a series of B,B',B''-trianthryl-N,N',N''-triarylborazines and the bundle effects on their properties.
Facile structural derivatization at the 10-position of the anthryl moieties of trianthrylborazine was conducted to demonstrate the utility of the borazine skeleton as a core framework for new organic electronic materials.
Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 .
New donor-acceptor triarylboron emitters that show thermally activated delayed fluorescence and high photoluminescence quantum yields of 87-100 % in host matrices are designed and synthesized.
Planarized triarylboranes: stabilization by structural constraint and their plane-to-bowl conversion.
These compounds were stable toward air, water, and amines, despite the absence of steric protection in the vertical direction with respect to the B atoms, and showed characteristic structural, electronic, and photophysical properties.
Reproducible Fabrication of Efficient Perovskite-based Solar Cells: X-ray Crystallographic Studies on the Formation of CH3NH3PbI3 Layers
Lead halide complexes formed during the fabrication of perovskite (CH3NH3PbI3)-based solar cells were examined by single-crystal X-ray diffraction analysis. Based on the observed results, the fabri...
Highly emissive organic solids containing 2,5-diboryl-1,4-phenylene unit.
A series of pi-conjugated systems containing 2,5-bis(dimesitylboryl)-1,4-phenylene as the core unit and electron-donating amino groups at the terminal positions behave like donor-acceptor-donor quadrupolar pi-electron systems and show a large solvatochromism in the fluorescence spectra.
Highly stable perovskite solar cells with an all-carbon hole transport layer.
It is demonstrated that a single-walled carbon nanotubes/graphene oxide buffer layer greatly improves the photovoltaic performance of organo-lead iodide perovskite solar cells and works as an efficient hole transport/electron blocking layer.