Results 21 to 30 of about 267 (145)

Cooling Fiber Laser Power Converter Systems by Immersion in Oil

Photonics
We demonstrate the use of Laser Power Converters (LPCs) driven by fiber laser light while immersed in transformer oil for heat management purposes. Reliability tests performed via extended continuous operation using 6–7 W of input power from 808 nm and ...
Denis Masson, Simon Fafard
doaj   +1 more source

Efficiency increase in multijunction monochromatic photovoltaic devices due to luminescent coupling [PDF]

Journal of Applied Physics, 2020
We present a multijunction detailed-balance model that includes the effects of luminescent coupling, light trapping, and nonradiative recombination, suitable for the treatment of multijunction solar cells and photonic power converters—photovoltaic devices designed to convert the narrow-band light.
Daixi Xia, Jacob J. Krich
openaire   +2 more sources

67.5% Efficient InP-Based Laser Power Converters at 1470 nm at 77 K

Photonics
Recent developments in long wavelength and cryogenic laser power converters have unlocked record performances in both areas. Here, devices for an optical input at ~1470 nm are studied for cryogenic applications, combining these cryogenic and long ...
Simon Fafard, Denis Masson
doaj   +1 more source

Formation and destabilization of Ga interstitials in GaAsN: Experiment and theory [PDF]

, 2012
Using first-principles total energy calculations we have found complex defects induced by N incorporation in GaAsN. The formation energy of the Ga interstitial atom is very significantly decreased due to local effects within the defect complex.
Dahl, J., Guina, M., Johansson, B., Kokko, K., Kuzmin, M., Lang, J., Laukkanen, P., Levamaki, H., Lund University., Palotas, K., Punkkinen, M. P. J., Puustinen, J., Schulte, Karina,, Tuominen, M., Vitos, L., Zhang, H. L.   +15 more
core   +1 more source

Impurity Photovoltaic Effect in Multijunction Solar Cells

Procedia Technology, 2013
AbstractA study has been carried out to investigate the Impurity Photovoltaic (IPV) effect on the performance of a double junction solar cell, which is yet, to the best of the authors’ knowledge, the first attempt at incorporating IPV effect in multijunction solar cell.
Khan, Md. Shahriar Parvez, Farzana, Esmat   +1 more
openaire   +1 more source

Steering perovskite precursor solutions for multijunction photovoltaics

Nature
Abstract Multijunction photovoltaics (PVs) are gaining prominence owing to their superior capability of achieving power conversion efficiencies (PCEs) beyond the radiative limit of single-junction cells1–8, for which improving narrow-bandgap (NBG) tin–lead perovskites is critical for thin-film devices9. Here, with a focus on understanding the
Hu, S, Wang, J, Zhao, P, Pascual, J, Wang, J, Rombach, F, Dasgupta, A, Liu, W, Truong, MA, Zhu, H, Kober-Czerny, M, Drysdale, JN, Smith, JA, Yuan, Z, Aalbers, GJW, Schipper, NRM, Yao, J, Nakano, K, Turren-Cruz, S-H, Dallmann, A, Christoforo, MG, Ball, JM, McMeekin, DP, Zaininger, K-A, Liu, Z, Noel, NK, Tajima, K, Chen, W, Ehara, M, Janssen, RAJ, Wakamiya, A, Snaith, HJ   +31 more
openaire   +5 more sources

Demonstration of Power-over-Fiber with Watts of Output Power Capabilities over Kilometers or at Cryogenic Temperatures

Photonics
We demonstrate the use of laser diodes and multijunction photovoltaic power converters to efficiently deliver watts of electrical power for long-distance or cryogenic applications. Transmission through single-mode and multi-mode fibers at the wavelengths
Simon Fafard, Denis Masson
doaj   +1 more source

Design and fabrication of silicon nanowires towards efficient solar cells [PDF]

, 2016
The recent rise of semiconductor nanowires opens new opportunities for realizing high efficiency photovoltaic devices at low cost due to the unique one-dimensional structure with remarkable electrical and optical properties.
Jagadish, C, Liu, S, Wang, ZM, Wu, J, Xiong, J, Yu, P   +5 more
core   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

Comparing nanowire, multijunction, and single junction solar cells in the presence of light trapping

, 2016
In this paper we quantify the constraints and opportunities for radial junctionnanowiresolar cells, compared to single junction and multijunction solar cells, when light trapping is included.
Beck, Fiona, Catchpole, K. R, Mokkapati, S   +2 more
core   +1 more source