Search Results - "LEVI, D. H"

The role of drift, diffusion, and recombination in time-resolved photoluminescence of CdTe solar cells determined through numerical simulation by Kanevce, A., Levi, D. H., Kuciauskas, D.

“…Time‐resolved photoluminescence (TRPL) measurements are one of the key metrics available to determine the minority‐carrier lifetime in the absorber layer of…”
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Effect of emitter deposition temperature on surface passivation in hot-wire chemical vapor deposited silicon heterojunction solar cells by Wang, T.H., Iwaniczko, E., Page, M.R., Levi, D.H., Yan, Y., Branz, H.M., Wang, Q.

“…Low substrate temperature (< 150 °C) during initiation of amorphous silicon emitter deposition by hot-wire chemical vapor deposition is found to be crucial for…”
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Effect of Cu deficiency on the optical properties and electronic structure of CuInSe2 and CuIn0.8Ga0.2Se2 determined by spectroscopic ellipsometry by Han, Sung-Ho, Hermann, Allen M., Hasoon, F. S., Al-Thani, H. A., Levi, D. H.

“…Spectroscopic ellipsometry measurements of CuInSe2 (CIS) and CuIn0.8Ga0.2Se2 (CIGS) reveal that there are important differences in electronic properties…”
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Effects of CdCl2 treatment on the recrystallization and electro-optical properties of CdTe thin films by Moutinho, H. R., Al-Jassim, M. M., Levi, D. H., Dippo, P. C., Kazmerski, L. L.

“…The effects of CdCl2 processing on the physical and electro-optical properties of CdTe were evaluated for thin films produced by physical vapor deposition and…”
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Investigation of induced recrystallization and stress in close-spaced sublimated and radio-frequency magnetron sputtered CdTe thin films by Moutinho, H. R., Dhere, R. G., Al-Jassim, M. M., Levi, D. H., Kazmerski, L. L.

“…We have induced recrystallization of small grain CdTe thin films deposited at low temperatures by close-spaced sublimation (CSS), using a standard CdCl 2…”
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In-situ studies of the growth of amorphous and nanocrystalline silicon using real time spectroscopic ellipsometry by Levi, D.H., Nelson, B.P., Iwanizcko, E., Teplin, C.W.

“…Real-time spectroscopic ellipsometry (RTSE) has been used to characterize the optical and structural properties of hot-wire CVD (HWCVD) deposited amorphous and…”
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Approach toward high efficiency CdTe/CdS heterojunction solar cells by Chou, H.C., Rohatgi, A., Jokerst, N.M., Kamra, S., Stock, S.R., Lowrie, S.L., Ahrenkiel, R.K., Levi, D.H.

“…CdTe solar cells were fabricated by depositing MOCVD grown CdTe films on CdS/SnO 2/glass substrates with varying Te:Cd mole ratios in the growth ambient. Cells…”
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Microsecond lifetimes and low interface recombination velocities in moderately doped n-GaAs thin films by LUSH, G. B, MELLOCH, M. R, LUNDSTROM, M. S, LEVI, D. H, AHRENKIEL, R. K, MACMILLAN, H. F

“…We have observed lifetimes greater than 1 μs in moderately doped, thin film, n-GaAs/Al0.3Ga0.7As double heterostructure membranes formed by etching away the…”
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Real-time spectroscopic ellipsometry studies of the growth of amorphous and epitaxial silicon for photovoltaic applications by Levi, D. H., Teplin, C. W., Iwaniczko, E., Yan, Y., Wang, T. H., Branz, H. M.

“…In situ monitoring of material properties during thin-film deposition provides researchers with a valuable tool for maximizing solar cell performance, while…”
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Back contact effects on junction photoluminescence in CdTe/CdS solar cells by Levi, D.H., Woods, L.M., Albin, D.S., Gessert, T.A., Niles, D.W., Swartziender, A., Rose, D.H., Ahrenkiel, R.K., Sheldon, P.

“…Studies of junction photoluminescence in CdTe/CdS solar cells reveal that back-contact application produces a dramatic qualitative change in the junction PL…”
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Enterococcus faecalis sustained infection induces macrophage pro‐resolution polarization by Polak, David, Yaya, Alin, Levy, Dan Henry, Metzger, Zvi, Abramovitz, Itzhak

“…Aim To investigate macrophage function in the presence of sustained infection with Enterococcus faecalis, a prevalent root canal resident in asymptomatic…”
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Defect characterization by admittance spectroscopy techniques based on temperature-rate duality by Li, J V, Yanfa Yan, Ptak, A J, Repins, I L, Levi, D H

“…The behavior of charge trapping and detrapping by deep levels depends on both temperature and the rate at which the measurement (e.g., admittance spectroscopy)…”
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Coordinated electrical characterization system for photovoltaic devices by Li, J V, Tynan, J, Hao-Chih Yuan, Qi Wang, Albin, D S, Xiaonan Li, Levi, D H

“…We report the development of a coordinated electrical characterization station integrating the data collection and analysis of a wide variety of DC, AC, and…”
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Photoconductive lifetime of CdS used in thin-film solar cells by Ahrenkiel, R.K., Levi, D.H., Johnston, S., Song, W., Mao, D., Fischer, A.

“…Thin-film CdS is used as a window layer in most of the current thin-film polycrystalline device technologies including absorbers based on cadmium telluride…”
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Hot-carrier cooling in GaAs : quantum wells versus bulk by ROSENWAKS, Y, HANNA, M. C, LEVI, D. H, SZMYD, D. M, AHRENKIEL, R. K, NOZIK, A. J

“…Hot-electron cooling dynamics in photoexcited bulk and quantum-well GaAs structures were determined using time-correlated single-photon counting of…”
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In situ studies of the amorphous to microcrystalline transition of hot-wire chemical vapor deposition Si:H films using real-time spectroscopic ellipsometry by Levi, D. H., Nelson, B. P., Perkins, J. D., Moutinho, H. R.

“…In situ real-time spectroscopic ellipsometry (RTSE) provides detailed information on the evolution of the structural and optical properties of Si:H films…”
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Minority Carrier Lifetime Analysis in the Bulk of Thin-Film Absorbers Using Subbandgap (Two-Photon) Excitation by Kuciauskas, Darius, Kanevce, Ana, Burst, James M., Duenow, Joel N., Dhere, Ramesh, Albin, David S., Levi, Dean H., Ahrenkiel, Richard K.

“…We describe a new time-resolved photoluminescence (TRPL) analysis method for the determination of minority carrier lifetime {\tau}_{B} . This analysis is based…”
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Effective interfaces in silicon heterojunction solar cells by Wang, T.H., Iwaniczko, E., Page, M.R., Levi, D.H., Yan, Y., Yelundur, V., Branz, H.M., Rohatgi, A., Wang, Q.

“…Thin hydrogenated amorphous silicon (a-Si:H) layers deposited by hot-wire chemical vapor deposition (HWCVD) are investigated for use in silicon heterojunction…”
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Spectrally and time resolved photoluminescence analysis of the CdS/CdTe interface in thin-film photovoltaic solar cells by Kuciauskas, Darius, Kanevce, Ana, Duenow, Joel N., Dippo, Pat, Young, Matthew, Li, Jian V., Levi, Dean H., Gessert, Timothy A.

“…Light absorption and charge separation in thin-film polycrystalline cadmium telluride (CdTe) photovoltaic (PV) solar cells largely occur in the vicinity of the…”
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Numerical modeling of the influence of photon recycling on lifetime measurements by Durbin, S.M., Gray, J.L., Ahrenkiel, R.K., Levi, D.H.

“…Accurate determination of minority carrier lifetimes in solar cell devices is important for developing numerical models and making performance predictions. One…”
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