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Selected Communications, Short Notes, and Abstracts
Published in V. B. Dement’ev, A. K. Haghi, V. I. Kodolov, Nanoscience and Nanoengineering, 2019
V. B. Dement’ev, A. K. Haghi, V. I. Kodolov
Nanocrystalline copper selenide (CuSe) with 280 nm-thickness films are synthesized. It was found out that the photocurrent pulse arises in the CuSe filmed under the 1064 nm pulsed nanosecond laser radiation. It is shown that the photocurrent polarity depends on the incidence angle sign and the photocurrent amplitude depends both on the incidence angle sign and incident radiation polarization. The mechanism of the observed phenomenon is suggested1–9.
Temperature dependent electrical and optical properties with higher photosensitivity of Cu2Se absorber thin films for photo voltaic application
Published in Inorganic and Nano-Metal Chemistry, 2021
J. Henry, T. Daniel, V. Balasubramanian, K. Mohanraj, G. Sivakumar
Copper selenide is a p-type material which finds application in solar cells[1] owing to its band gap energy 1.2–2.3 eV.[2] Also it is used in optical filters, window materials, super ionic conductors and highly conducting semi-transparent and semiconductors.[3] It is an excellent cathode material for sodium ion batteries[4] and used in microwave shielding coatings.[5] The compound shows many phases and structural forms: stoichiometric α-Cu2Se, Cu3Se2, CuSe and CuSe2 and non-stoichiometric form Cu2-xSe.[6] Their thermal stability depends on respective stoichiometric forms.[7] The Cu2Se is an ideal candidate due to its excellent photoelectrical properties.[8]
Electrical and optical properties of Sb-doped Cu2Se thin films deposited by chemical bath deposition
Published in Phase Transitions, 2020
J. Henry, T. Daniel, V. Balasubramanian, K. Mohanraj, G. Sivakumar
In recent years the transition-metal chalcogenides have gained tremendous interest due to their potential application in solar cell, thermoelectric power converter, optical filters, etc [1–4]. CdS and CdTe are mostly used for solar cell applications and optical devices and show higher efficiency; however, the toxicity of these material limits their use in practical and industrial uses. During the past decades, copper selenide (Cu2Se) has attained a major role in photovoltaic applications [2,3] due to its wide band gap ranging from 1.2 to 2.3 eV [1,3]. Cu2Se is a p-type semiconductor. Govindraju et al., [5] employed Cu2Se nanoparticles in hybrid solarcells and obtained 1.02% photoconversion efficiency (PCE) [5]. Eskandari and Ahmadi [6] used Cu2Se as a counter electrode for quantum dot-sensitized solar cells (QDSSCs) and obtained 2.28% PCE [6]. The obtained efficiency is very low for commercial application; hence it is necessary to improve it. This can be done by tuning the optical properties of the Cu2Se by doping.