Search Results - "Roy, U N"

Growth and interface study of 2 in diameter CdZnTe by THM technique by Roy, U.N., Weiler, S., Stein, J.

“…Growth interface of large diameter CdZnTe ingots grown from Te solution by travelling heater method have been studied. Both macroscopic and microscopic…”
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Growth and characterization of detector-grade CdMnTe by the vertical Bridgman technique by Roy, U. N., Okobiah, O. K., Camarda, G. S., Cui, Y., Gul, R., Hossain, A., Yang, G., Egarievwe, S. U., James, R. B.

“…We grew Cd1-xMnxTe crystals with a nominal Mn concentration of 5% by the vertical Bridgman growth technique. The compositional variation along the length of…”
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Impact of Rural-urban Labour Migration on Education of Children: A Case Study of Left behind and Accompanied Migrant Children in India by Roy, Archana K, Singh, Pappu, Roy, U N

“…In developing countries, seasonal labour migration from rural to urban or from backward to developed region is a household livelihood strategy to cope with…”
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Charge-transport properties of as-grown Cd1-xZnxTe1-ySey by the traveling heater method by Roy, U. N., Camarda, G. S., Cui, Y., Gul, R., Yang, G., James, R. B.

“…In this article, we report on the charge-transport characteristics of a new quaternary material Cd1-xZnxTe1-ySey (CZTS) grown by the Traveling Heater Method…”
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Topographic Evaluation of the Effect of Passivation in Improving the Performance of CdZnTe Detectors by Hossain, A., Dowdy, A., Bolotnikov, A. E., Camarda, G. S., Cui, Y., Roy, U. N., Tappero, R., Tong, X., Yang, G., James, R. B.

“…Surface passivation reportedly is an effective technique for controlling surface leakage current and its related electronic noise. Several chemical agents have…”
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Assessment of a new ZnO:Al contact to CdZnTe for X- and gamma-ray detector applications by Roy, U. N., Camarda, G. S., Cui, Y., Gul, R., Hossain, A., Yang, G., Mundle, R. M., Pradhan, A. K., James, R. B.

“…The large mismatch of the coefficients of thermal expansion (CTE) between the metal contact and CdZnTe exerts thermal stress at the metal/CZT interface, which…”
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Size and distribution of Te inclusions in THM as-grown CZT wafers: The effect of the rate of crystal cooling by Roy, U.N., Weiler, S., Stein, J., Hossain, A., Camarda, G.S., Bolotnikov, A.E., James, R.B.

“…The concentration and size distribution of Te inclusions/precipitates in CZT are key factors in a device's performance. High concentrations can degrade the…”
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Zinc mapping in THM grown detector grade CZT by Roy, U.N., Weiler, S., Stein, J., Cui, Y., Groza, M., Buliga, V., Burger, A.

“…We have employed photoluminescence mapping at room temperature of detector grade CZT grown by modified Traveling Heater Method (THM) technique and estimated…”
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Photocurrent response of B12As2 crystals to blue light, and its temperature- dependent electrical characterizations by Gul, R., Cui, Y., Bolotnikov, A. E., Camarda, G. S., Egarievwe, S. U., Hossain, A., Roy, U. N., Yang, G., Edgar, J. H., Nwagwu, U., James, R. B.

“…With the global shortage of 3He gas, researchers worldwide are looking for alternative materials for detecting neutrons. Among the candidate materials,…”
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Role of selenium addition to CdZnTe matrix for room-temperature radiation detector applications by Roy, U. N., Camarda, G. S., Cui, Y., Gul, R., Hossain, A., Yang, G., Zazvorka, J., Dedic, V., Franc, J., James, R. B.

“…Because of its ideal band gap, high density and high electron mobility-lifetime product, cadmium zinc telluride (CdZnTe or CZT) is currently the best…”
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New scintillator materials (K 2CeBr 5 and Cs 2CeBr 5) by Hawrami, R., Batra, A.K, Aggarwal, M.D, Roy, U.N., Groza, M., Cui, Y., Burger, A., Cherepy, Nerine, Niedermayr, Thomas, Payne, Stephen A.

“…Cesium cerium bromide (Cs 2CeBr 5) and potassium cerium bromide (K 2CeBr 5) are new scintillator materials for X-ray and gamma ray detector applications…”
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Evaluation of crystalline quality of traveling heater method (THM) grown Cd0.9Zn0.1Te0.98Se0.02 crystals by Roy, U. N., Baker, J. N., Camarda, G. S., Cui, Y., Yang, G., James, R. B.

“…Because of its excellent opto-electronic properties, CdZnTe (CZT) has been the material of choice for x- and gamma-ray detectors operable at room temperature…”
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Investigation of Deep Levels in CdZnTeSe Crystal and Their Effect on the Internal Electric Field of CdZnTeSe Gamma-Ray Detector by Rejhon, M., Dedic, V., Beran, L., Roy, U. N., Franc, J., James, R. B.

“…A study of deep levels in CdZnTeSe radiation-detection materials is presented. The approach relies on electrical methods that combine time and temperature…”
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Concentration of extended defects in CdZnTe single crystals: Effects of cooling rate after growth by Xu, L., Jie, W., Bolotnikov, A.E., Roy, U.N., Stein, J., Hossain, A., Camarda, G.S., Kim, K-H., Yang, G., Gul, R., Cui, Y., Xu, Y., Wang, T., Zha, G., James, R.B.

“…We analyzed two CZT crystals cut from as-grown CdZnTe (CZT) ingots, the only difference between them being the rate of cooling after the crystal growth…”
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Ferromagnetism in nanocrystalline epitaxial Co:TiO2 thin films by Pradhan, A. K., Hunter, D., Dadson, J. B., Williams, T. M., Zhang, Kai, Lord, K., Lasley, B., Rakhimov, R. R., Zhang, Jun, Sellmyer, D. J., Roy, U. N., Cui, Y., Burger, A., Hopkins, C., Pearson, N., Wilkerson, A. L.

“…We report on the observation of remarkable room-temperature ferromagnetism in nanocrystalline epitaxial Co:TiO2 films grown on sapphire (0001) substrates by a…”
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Growth of aligned ZnO nanorods by Pradhan, A K, Williams, T M, Zhang, K, Hunter, D, Dadson, J B, Lord, K, Roy, U N, Cui, Y, Burger, A

“…Growth of high-density and aligned ZnO nanorods on ZnO film substrate has been demonstrated using vapor-transport of thermally evaporated Zn metal powders…”
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Magnetic and spectroscopic characteristics of ZnMnO system by Pradhan, A.K., Hunter, D., Zhang, Kai, Dadson, J.B., Mohanty, S., Williams, T.M., Lord, K., Rakhimov, R.R., Roy, U.N., Cui, Y., Burger, A., Zhang, Jun, Sellmyer, D.J.

“…We report on the observation of room-temperature ferromagnetism in epitaxial (Zn,Mn)O films grown by a pulsed-laser deposition technique using high-density…”
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Surface plasmon excitation via Au nanoparticles in n-CdSe∕p-Si heterojunction diodes by Konda, R. B., Mundle, R., Mustafa, H., Bamiduro, O., Pradhan, A. K., Roy, U. N., Cui, Y., Burger, A.

“…We report on the significant enhancement of photocurrent in pn heterojunction diode, consisting of n-CdSe∕p-Si substrates, in situ deposited with Au…”
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Novel ZnO:Al contacts to CdZnTe for X- and gamma-ray detectors by Roy, U. N., Mundle, R. M., Camarda, G. S., Cui, Y., Gul, R., Hossain, A., Yang, G., Pradhan, A. K., James, R. B.

“…CdZnTe (CZT) has made a significant impact as a material for room-temperature nuclear-radiation detectors due to its potential impact in applications related…”
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Study of annealing-induced changes in CdS thin films using X-ray diffraction and Raman spectroscopy by Mishra, Shramana, Ingale, Alka, Roy, U.N., Gupta, Ajay

“…We have investigated as grown and annealed (300 °C, 400 °C and 500 °C) thin films of CdS grown on GaAs (001) by chemical bath deposition. X-ray diffraction…”
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