Terahertz Conductivity within Colloidal CsPbBr 3 Perovskite Nanocrystals: Remarkably High Carrier Mobilities and Large Diffusion Lengths
Indian Institute of Science Education and Research Pune
Abstract
Colloidal CsPbBr3 perovskite nanocrystals (NCs) have emerged as an excellent light emitting material in last one year. Using time domain and time-resolved THz spectroscopy and density functional theory based calculations, we establish 3-fold free carrier recombination mechanism, namely, nonradiative Auger, bimolecular electron-hole recombination, and inefficient trap-assisted recombination in 11 nm sized colloidal CsPbBr3 NCs. Our results confirm a negligible influence of surface defects in trapping charge carriers, which in turn results into desirable intrinsic transport properties, from the perspective of device applications, such as remarkably high carrier mobility (∼4500 cm(2) V(-1) s(-1)), large diffusion…
Citation impact
- FWCI
- 38.50
- Percentile
- 100%
- References
- 75
Authors
7- GRGurivi Reddy YettapuCorresponding
Indian Institute of Science Education and Research Pune
- DTDebnath Talukdar
Indian Institute of Science Education and Research Pune
- SSSohini Sarkar
Indian Institute of Science Education and Research Pune
- ASAbhishek Swarnkar
Indian Institute of Science Education and Research Pune
- ANAngshuman Nag
Indian Institute of Science Education and Research Pune
Topics & keywords
- Perovskite (structure)
- Photoluminescence
- Materials science
- Quantum yield
- Charge carrier
- Electron mobility
- Chemical physics
- Auger effect