Structural, optical, electrical and luminescence properties of electron beam evaporated CdSe:In films

Basheer, M. G. Syed Ahamed; Rajni, K S; Vidhya, V.S.; Swaminathan, Viswanathan; Thayumanavan, A.; Murali, K. R.; Jayachandran, M.

doi:10.1002/crat.201000546

Cited by 22 publications

(4 citation statements)

References 18 publications

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“…In Fig. 7b, the Cd 3d 3/2 and Cd 3d 5/2 peaks at 413.0 and 406.3 eV in pure cadmium nitrate were observed 39, 40. These peaks were shifted to 412.5 and 405.8 eV in the presence of chitosan/bentonite.…”

Section: Resultsmentioning

confidence: 83%

Adsorption Mechanism of Bentonite with Dispersed Chitosan for Cadmium Ions

Huang

Xie

et al. 2021

Chem Eng & Technol

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Chitosan was dispersed on bentonite for the preparation of a Cd2+ adsorbent. The adsorption process followed a Freundlich isotherm, and the experimental adsorption capacity was determined. For understanding the adsorption mechanism, the pristine and Cd‐doped adsorbents were analyzed by Fourier transform infrared and X‐ray photoelectron spectroscopy. A red shift of the band corresponding to amino groups was observed, while the Cd 3d binding energy declined. Furthermore, density functional theory calculation results indicated that Cd2+ bonded with amino and hydroxyl groups in chitosan. The zeta potential of the adsorbent was lower than that of the support bentonite, improving the electrostatic affinity for Cd2+. The synergy between electrostatic and coordination interactions contributed to the adsorption capacity.

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Section: Resultsmentioning

confidence: 83%

Adsorption Mechanism of Bentonite with Dispersed Chitosan for Cadmium Ions

Huang

Xie

et al. 2021

Chem Eng & Technol

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“…For samples after 3-, 6-, and 9-day hydrogenation, the peak shifts for that without passivation by 0.18 • , 0.20 • , and 0.34 • , respectively. This result indicates that the incorporation of interstitial hydrogen can gradually increase the lattice distortion and lower the crystalline quality, [40][41][42] which explains the decreasing V OC in the cell device. [33,34] Wavenumber/cm…”

Section: Resultsmentioning

confidence: 92%

Improving the performance of crystalline Si solar cell by high-pressure hydrogenation*

Dai¹,

Zhang²,

Wang³

et al. 2020

Chinese Phys. B

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We report an approach of high-pressure hydrogenation to improve the performance of crystalline Si (c-Si) solar cells. As-received p-type c-Si wafer-based PN junctions were subjected to high-pressure (2.5 MPa) hydrogen atmosphere at 200 °C, followed by evaporating antireflection layers, passivation layers, and front and rear electrodes. The efficiency of the so prepared c-Si solar cell was found to increase evidently after high-pressure hydrogenation, with a maximal enhancement of 10%. The incorporation of hydrogen by Si solar cells was identified, and hydrogen passivation of dangling bonds in Si was confirmed. Compared to the regular approach of hydrogen plasma passivation, the approach of high-pressure hydrogenation reported here needs no post-hydrogenation treatment, and can be more convenient and efficient to use in improving the performances of the c-Si and other solar cells.

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“…CdSe is a promising photovoltaic material due to its direct energy gap and high absorption coefficient for absorbing light very efficiently and converting it into electrical energy. The CdSe compound has interesting properties and is suitable for many potential applications such as in solid-state devices such as solar cells, high-efficiency thin-film transistors, light-emitting diodes, and also gamma-ray detectors, as well as photoanodes in photoelectronchemical cells (PEC) and Electric lighting devices [10][11][12]. Most of theoretical investigations have focused on the properties resulting from the quantum confinement effect [13], in 1996, through photometric measurements on CdSe quantum dots, Ephroso's spherical confinement models and Wang's atomic models were revealed.…”

Section: Introductionmentioning

confidence: 99%

First-principle investigations of structural and optical properties of CdSe

Benkrima,

Belfennache,

Yekhlef

et al. 2023

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Our calculations have been done using the density functional theory (DFT). In fact, we were able to find the optical and structural properties of CdSe compound of cubic phase by using the previously mentioned theory. The pseudo-potential linearised augmented plane wave (PP-LAPW) method is applied to solve the Kuhn-Sham equations. The results are obtained using Generalized Gradient Approximation according to the scheme described by Perdew-Burke-Ernzerhof (GGA-PBE) as a types of exchange-correlation. Convergence of energy and charge has been verified, this is for the study of properties basic state of the compound. It was found that the calculated initial cell constants at equilibrium are very close to previous theoretical and experimental works. The electronic properties of the energy band structure and the total density of states confirmed that the CdSe compound has a direct energy gap estimated at 1.52 eV, which is very close to the previous applied results. The general results of the calculated optical properties including the imaginary part of the dielectric constant, absorption coefficient, reflectivity, optical conductance, refractive index, and extinction coefficient of cubic phase CdSe under the imposed conditions are discussed and compared with previous works. Through our results, new and important optical properties of the compound were highlighted, and then determine the areas of its use in the appropriate technological industries.

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Structural, optical, electrical and luminescence properties of electron beam evaporated CdSe:In films

Cited by 22 publications

References 18 publications

Adsorption Mechanism of Bentonite with Dispersed Chitosan for Cadmium Ions

Adsorption Mechanism of Bentonite with Dispersed Chitosan for Cadmium Ions

Improving the performance of crystalline Si solar cell by high-pressure hydrogenation*

First-principle investigations of structural and optical properties of CdSe

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