Internal quantum efficiency of radiation in a bulk CH3NH3PbBr3 perovskite crystal quantified by using the omnidirectional photoluminescence spectroscopy
Source abstract
Abstract
The internal quantum efficiency (IQE) of radiation for bulk CH3NH3PbBr3 crystals was quantified by using omnidirectional photoluminescence spectroscopy. The angle-resolved photoluminescence revealed that the emission with photon energies higher than the absorption-edge shows a Lambertian distribution and that the light extraction efficiency is determined by the escaping cone. The IQE value strongly depends on the photo-excitation density (P), and a CH3NH3PbBr3 crystal fabricated under the methylammonium-rich conditions gave the maximum IQE of 62.5% under P = 28 W/cm2. A further increase in P gave rise to the decrease in IQE due to the Auger effects.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Optical properties and cooling technologies in crystalline materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 1 , Aoba, Sendai 980-8577, Japan
Applied Spectroscopy Systems Department, Hamamatsu Photonics K. K. 2 , Higashiku, Hamamatsu 431-3196, Japan
Graduate School of Science, Chiba University 3 , Inage, Chiba 263-8522, Japan
Institute for Chemical Research, Kyoto University 4 , Gokasho, Uji 611-0011, Japan
Funding
Five-star Alliance · Japan Society for the Promotion of Science · Core Research for Evolutional Science and Technology
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