Energy Gap-Refractive Index Relations in Perovskites
نویسندگان
چکیده
منابع مشابه
Energy gap–refractive index relations in semiconductors – An overview
An overview of the understanding of correlations between energy gap and refractive index of semiconductors is presented here. The atomic approach of Moss, the nearly free electron model of Penn, the oscillator concept of Wemple and the optical polarizability approach of Finkenrath are considered in this study. The Ravindra relation is discussed in the context of alternate approaches that have b...
متن کاملA study of energy gap, refractive index and electronic polarizability of ternary chalcopyrite semiconductors
A simple relation between the optical electronegativity, energy gap, refractive index and electronic polarizability is given for ternary chalcopyrite semiconductors. Energy gap has been evaluated from the optical electronegativity whereas refractive index and electronic polarizability values have been evaluated from the energy gap by proposing a linear relation between them. The calculated valu...
متن کاملHot-carrier cooling and photoinduced refractive index changes in organic–inorganic lead halide perovskites
Metal-halide perovskites are at the frontier of optoelectronic research due to solution processability and excellent semiconductor properties. Here we use transient absorption spectroscopy to study hot-carrier distributions in CH3NH3PbI3 and quantify key semiconductor parameters. Above bandgap, non-resonant excitation creates quasi-thermalized carrier distributions within 100 fs. During carrier...
متن کاملNegative Refractive Index Materials
Negative Refractive Index Materials Victor Veselago,1 Leonid Braginsky,2 Valery Shklover,3 and Christian Hafner4 ∗ 1Laboratory of Magnetic Materials, A. M. Prokhorov Institute of General Physics, 38 Vavilov Street, 119991 Moscow, Russia 2Institute of Semiconductors’ Physics, 13 Lavrent’eva Pr., 630090 Novosibirsk, Russia 3Laboratory of Crystallography, ETH Zürich, CH-8093 Zürich, Switzerland 4L...
متن کاملNoise in refractive index enhancement
By utilizing the interference between an absorptive resonance and an amplifying resonance, one can achieve an enhanced refractive index without an increase in absorption to the beam. We analyze noise added to the beam due to spontaneous emission while propagating through such an index enhanced medium. We find that, for a medium with a refractive index of n and of length L, n−1 2 / 0 L noise pho...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Materials
سال: 2020
ISSN: 1996-1944
DOI: 10.3390/ma13081917