Leaves like CdS films were grown on catalyst-free Si(100) and quartz substrates by vapor transport of CdS powder at 850 degrees C. Randomly aligned nanoleaves with different shapes were observed. X-ray diffraction analysis revealed that the leaves like CdS is a single phase nature with hexagonal crystal structure. The optical functions of CdS films have been determined by ellipsometry investigations from 400 - 1100 nm. A two layer model employing the Cauchy dispersion model for the main layer and Bruggeman effective medium approximation (BEMA) for the surface layer was found to be sufficient and reasonable. The obtained optical constants were compared with those obtained by other preparation methods. The transmittance has high values while the reflectance has low values in the wavelength range 450 - 2500 nm. A direct optical band gap value of 2.41 eV and Urbach energy of 2671 meV were obtained.
机构:
Vel Tech Multi Tech, Dept Chem S&H, Madras 600062, Tamil Nadu, India
Alagappa Univ, Sch Chem Sci, Dept Ind Chem, Karaikkudi 630003, Tamil Nadu, IndiaVel Tech Multi Tech, Dept Chem S&H, Madras 600062, Tamil Nadu, India
Sanmugam, Anandhavelu
Vikraman, Dhanasekaran
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Dongguk Univ Seoul, Div Elect & Elect Engn, Seoul 04620, South KoreaVel Tech Multi Tech, Dept Chem S&H, Madras 600062, Tamil Nadu, India
Vikraman, Dhanasekaran
Venkatesan, Sethuraman
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Alagappa Univ, Sch Chem Sci, Dept Ind Chem, Karaikkudi 630003, Tamil Nadu, IndiaVel Tech Multi Tech, Dept Chem S&H, Madras 600062, Tamil Nadu, India
Venkatesan, Sethuraman
Park, Hui Joon
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Ajou Univ, Div Energy Syst Res, Suwon 16499, South Korea
Ajou Univ, Dept Elect & Comp Engn, Suwon 16499, South KoreaVel Tech Multi Tech, Dept Chem S&H, Madras 600062, Tamil Nadu, India
机构:
High Inst Engn & Technol, Dept Basic Sci, Al Arish, North Sinai, EgyptHigh Inst Engn & Technol, Dept Basic Sci, Al Arish, North Sinai, Egypt
Zedan, I. T.
Azab, A. A.
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Natl Res Ctr, Phys Res Div, Dept Solid State Phys, Solid State Elect Lab, Giza 12622, EgyptHigh Inst Engn & Technol, Dept Basic Sci, Al Arish, North Sinai, Egypt
Azab, A. A.
El-Menyawy, E. M.
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Natl Res Ctr, Phys Res Div, Dept Solid State Phys, Solid State Elect Lab, Giza 12622, EgyptHigh Inst Engn & Technol, Dept Basic Sci, Al Arish, North Sinai, Egypt
机构:
Dong Eui Univ, Elect & Elect Mat Engn Major, Div Adv Mat Engn, 176 Eomgwangno, Busan 47340, South KoreaDong Eui Univ, Elect & Elect Mat Engn Major, Div Adv Mat Engn, 176 Eomgwangno, Busan 47340, South Korea