Nano-ZnO film preparation at low temperature and the optical indices calculation

Yang, Ailing; Bao, Xichang; Li, Shun-pin; Yang, Renqiang; Wang, Ting; Wang, Yujin; Sun, Lingling

doi:10.1007/s11801-014-4034-6

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…For the four films with different thicknesses, the band gap is same (1.595 eV), which is almost as same as Ref. The refractive index n(λ) and absorption coefficient α(λ) of a thin film are related by Kramers-Kronig equation [21,23],…”

Section: Calculation and Discussionmentioning

confidence: 63%

“…The features of the films were characterized by SEM, XRD, UV-Vis absorption and transmittance spectra. Based on the Kramers-Kronig relation [21][22][23] and the transmittance spectra, the optical and dielectric constants of the CH 3 NH 3 PbI 3 perovskite films were calculated. Our results show that the band gap of the films, absorption coefficient, extinction coefficient, refractive indices, real and imaginary components of the dielectric constant of the CH 3 NH 3 PbI 3 films are basically independent on the thicknesses, which indicate our results are reliable.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Optical and Dielectric Constants of Organic-Inorganic CH3NH3PbI3 Perovskite Thin Films

Yang¹,

Bai²,

Bao³

et al. 2016

J Nanomed Nanotechnol

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CH 3 NH 3 PbI 3 thin films with thicknesses in the region of 230-365 nm were prepared. The films were characterized by scanning electron microscope (SEM), x-ray diffraction (XRD), ultraviolet-visible (UV-Vis) absorption and transmittance spectra. Based on the Kramers-Kronig relation and the transmittance spectra, the optical and dielectric constants of the CH 3 NH 3 PbI 3 thin films were investigated. Our results show that the absorption coefficient, extinction coefficient, refractive indices, real and imaginary components of the dielectric constant of the CH 3 NH 3 PbI 3 films are basically independent on the thicknesses of the films, which indicate our results are reliable. At 500 nm, above parameters of the films are ~ 1.38x10 5 cm -1 , 0.55, 2.70, 7.01, and 3.13, respectively. The band gap is 1.595 eV. The refractive index of CH 3 NH 3 PbI 3 thin films is 2.84 at 633 nm, which imply that CH 3 NH 3 PbI 3 -based solar cells (SCs) are ideal antireflection coatings for silicon SCs and are applicable to be top SC in monolithic silicon-based tandem SCs for beyond the efficiency limit of Si SCs. Our results are meaningful for designing optoelectronic devices related to the perovskite thin-films.

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Section: Calculation and Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%