Search Results - "BARNHAM, K. W. J"

Recent results for single-junction and tandem quantum well solar cells by Adams, J. G. J., Browne, B. C., Ballard, I. M., Connolly, J. P., Chan, N. L. A., Ioannides, A., Elder, W., Stavrinou, P. N., Barnham, K. W. J., Ekins-Daukes, N. J.

“…The band gap of the quantum well (QW) solar cell can be adapted to the incident spectral conditions by tailoring the QW depth. The single‐junction…”
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Resolving the energy crisis: nuclear or photovoltaics? by Barnham, K. W. J, Mazzer, M, Clive, B

“…The discussion on future sources of energy is heating up, particularly regarding the roles of nuclear and renewable resources. Using photovoltaics alone, we…”
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Quantum and conversion efficiency calculation of AlGaAs/GaAs multiple quantum well solar cells by Rimada, J. C., Hernandez, L., Connolly, J. P., Barnham, K. W. J.

“…The quantum well solar cell (QWSC) is a novel device that has been proposed by Barnham and co‐workers at Imperial College London. In this work, the quantum…”
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1 MeV electron irradiation influence on GaAs solar cell performance by Danilchenko, B., Budnyk, A., Shpinar, L., Poplavskyy, D., Zelensky, S.E., Barnham, K.W.J., Ekins-Daukes, N.J.

“…The results of experimental study of radiation resistance of GaAs-based solar cells are presented. The solar cells were irradiated by 1 MeV electrons at room…”
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Spectral response and I-V characteristics of large well number multi quantum well solar cells by Lynch, M C, Ballard, I M, Bushnell, D B, Connolly, J P, Johnson, D C, Tibbits, T N D, Barnham, K W J, Ekins-Daukes, N J, Roberts, J S, Hill, G, Airey, R, Mazzer, M

“…The inclusion of quantum wells in p-i-n solar cells leads to both an increase in photocurrent and a reduction in open circuit voltage. It has been shown that…”
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Short-circuit current enhancement in Bragg stack multi-quantum-well solar cells for multi-junction space cell applications by Bushnell, D.B., Ekins-Daukes, N.J., Barnham, K.W.J., Connolly, J.P., Roberts, J.S., Hill, G., Airey, R., Mazzer, M.

“…GaInP/GaAs tandem cells are limited by the current generated in the bottom GaAs junction. Strain-balanced multi-quantum well (MQW) solar cells offer a way of…”
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Strain-balanced MQW pin solar cells grown using a robot-loading showerhead reactor by Roberts, J.S., Airey, R., Hill, G., Calder, C., Barnham, K.W.J., Lynch, M., Tibbits, T., Johnson, D., Pakes, A., Grantham, T.

“…A touch-screen controlled, robot-loading system for the Thomas Swan 7×2 flip-top showerhead reactor has been developed. The reactor has been configured for the…”
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Observation of photon recycling in strain-balanced quantum well solar cells by Johnson, D. C., Ballard, I. M., Barnham, K. W. J., Connolly, J. P., Mazzer, M., Bessière, A., Calder, C., Hill, G., Roberts, J. S.

“…Photon recycling in strain-balanced quantum well solar cells grown on distributed Bragg reflectors has been observed as a suppression of the dark current and a…”
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Strain-balanced GaAsP/InGaAs quantum well solar cells by Ekins-Daukes, N. J., Barnham, K. W. J., Connolly, J. P., Roberts, J. S., Clark, J. C., Hill, G., Mazzer, M.

“…A strain-balance multiquantum well (MQW) approach to enhance the GaAs solar cell efficiency is reported. Using a p-i-n diode structure, the strain-balanced…”
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Progress in quantum well solar cells by Mazzer, M., Barnham, K.W.J., Ballard, I.M., Bessiere, A., Ioannides, A., Johnson, D.C., Lynch, M.C., Tibbits, T.N.D., Roberts, J.S., Hill, G., Calder, C.

“…A quantum well solar cell is a special multiple-band gap device with intermediate properties between heterojunction cells (sum of the currents generated in the…”
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Short-circuit current and energy efficiency enhancement in a low-dimensional structure photovoltaic device by BARNHAM, K. W. J, BRAUN, B, NELSON, J, PAXMAN, M, BUTTON, C, ROBERTS, J. S, FOXON, C. T

“…We have studied the forward bias behavior of AlGaAs/GaAs p-i-n multiquantum well (MQW) photodiodes. In samples with low background impurity levels in the…”
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Did civil reactors supply plutonium for weapons? by Barnham, K. W. J, Nelson, J, Stevens, R. A

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Radiation resistance of GaAs solar cells and hot carriers by Danilchenko, B.A., Budnyk, A.P., Shpinar, L.I., Yaskovets, I.I., Barnham, K.W.J., Ekins-Daukes, N.J.

“…The role of hot carriers in enhancing the radiation resistance of GaAs solar cells has been investigated. The laser-pulse induced, short-circuit current…”
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Where has Britain's plutonium gone? by Barnham, K. W. J, Nelson, J, Stevens, R. A

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Advances in Bragg stack quantum well solar cells by Johnson, D.C., Ballard, I., Barnham, K.W.J., Bishnell, D.B., Connolly, J.P., Lynch, M.C., Tibbits, T.N.D., Ekins-Daukes, N.J., Mazzer, M., Airey, R., Hill, G., Roberts, J.S.

“…Strain-balanced quantum well solar cells (SB-QWSC) extend the photon absorption edge beyond that of bulk GaAs by incorporation of quantum wells in the i-region…”
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Efficiency enhancement of ideal photovoltaic solar cells by photonic excitations in multi-intermediate band structures by Peng, R. W., Mazzer, M., Barnham, K. W. J.

“…We present an efficiency analysis of ideal photovoltaic solar cells based on multi-intermediate band structures. It is shown that the difference between the…”
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Wavy growth onset in strain-balanced InGaAs multi-quantum wells by Nasi, L., Ferrari, C., Lanzi, A., Lazzarini, L., Balboni, R., Clarke, G., Mazzer, M., Rohr, C., Abbott, P., Barnham, K.W.J.

“…Different strain-balanced InGaAs/InGaAs multi-quantum wells (MQWs) were grown on (0 0 1) InP to be used as active layers of thermophotovoltaic devices…”
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Photovoltaic efficiency enhancement through thermal up-conversion by Ekins-Daukes, N.J., Ballard, I., Calder, C.D.J., Barnham, K.W.J., Trupke, T., Brown, A., Roberts, J.S., Hill, G.

“…A scheme is presented whereby ambient thermal energy is coupled to sub-band-gap photons through the creation and recombination of electron hole pairs, thereby…”
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Experimental measurement of restricted radiative emission in quantum well solar cells by Adams, J G J, Elder, W, Stavrinou, P N, Roberts, J S, Gonzalez, M, Tischler, J G, Walters, R J, Abell, J, Vurgaftman, I, Meyer, J R, Jenkins, P, Barnham, K W J, Ekins-Daukes, N J

“…We present the first experimental data showing a restriction of the radiative recombination in strain-balanced quantum well solar cells. This arises due to the…”
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Steady-state carrier escape from single quantum wells by Nelson, J., Paxman, M., Barnham, K.W.J., Roberts, J.S., Button, C.

“…The authors have studied the variation in DC photocurrent with bias and temperature from GaAs-Al/sub x/Ga/sub 1-x/As single quantum wells embedded in p-i-n…”
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